K142573 · Lexington International, LLC · OAP · Dec 1, 2014 · Physical Medicine
Device Facts
Record ID
K142573
Device Name
HairMax LaserComb, HairMax LaserComb
Applicant
Lexington International, LLC
Product Code
OAP · Physical Medicine
Decision Date
Dec 1, 2014
Decision
SESE
Submission Type
Traditional
Regulation
21 CFR 890.5500
Device Class
Class 2
Attributes
Therapeutic
Indications for Use
The HairMax LaserComb 41 is indicated to treat Androgenetic alopecia and promote hair growth in males who have Norwood Hamilton Classifications of IIa to V patterns of hair loss and treat Androgenetic alopecia and, promote hair growth in females who have Ludwig (Savin) Scale I-4, II-1, II-2, or frontal, both with Fitzpatrick Skin Types I to IV. The HairMax LaserComb 82 is indicated to treat Androgenetic alopecia and promote hair growth in males who have Norwood Hamilton Classifications of IIa to V patterns of hair loss and treat Androgenetic alopecia and, promote hair growth in females who have Ludwig (Savin) Scale 1-4, II-1, II-2, or frontal, both with Fitzpatrick Skin Types I to IV.
Device Story
HairMax LaserComb 41 and 82 are low-level laser devices for home use to treat androgenetic alopecia. Devices feature hair-parting teeth to ensure laser light reaches the scalp. HMLC 82 emits 82 laser beams; HMLC 41 emits 41 beams; both at 655 nm wavelength. User places device on scalp sections; device uses vibration to signal when to move to next position. Proximity sensor prevents laser activation unless in contact with scalp. Internal lithium polymer battery powers device. Lasers automatically turn off after treatment duration. Output is intended to promote hair growth. Healthcare providers do not operate; patient self-use.
Clinical Evidence
Bench testing only. Laser safety testing per IEC60825-1:2007 confirmed Class 3R operation. Laser output parameters and dose rates were verified against predicate devices using calibrated equipment, confirming output levels are substantially equivalent within +/-10% tolerance.
Technological Characteristics
Low-level laser device; 655 nm (+/- 10 nm) wavelength; Class 3R laser. Features hair-parting teeth, proximity sensor, and internal rechargeable lithium polymer battery. Powered by 6VDC/1000mA wall transformer. Software-controlled treatment timing and vibration alerts. Designed for hands-free scalp contact.
Indications for Use
Indicated for males with Norwood Hamilton Classifications IIa to V and females with Ludwig (Savin) Scale I-4, II-1, II-2, or frontal patterns of Androgenetic alopecia, with Fitzpatrick Skin Types I to IV, to promote hair growth.
Regulatory Classification
Identification
An infrared lamp is a device intended for medical purposes that emits energy at infrared frequencies (approximately 700 nanometers to 50,000 nanometers) to provide topical heating.
Special Controls
*Classification.* Class II (special controls). The device, when it is an infrared therapeutic heating lamp, is exempt from the premarket notification procedures in subpart E of part 807 of this chapter subject to the limitations in § 890.9.
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Image /page/0/Picture/1 description: The image shows the logo for the U.S. Department of Health and Human Services. The logo consists of a circular seal with the text "DEPARTMENT OF HEALTH & HUMAN SERVICES - USA" arranged around the perimeter. Inside the circle is an abstract symbol featuring three stylized human profiles facing to the right, resembling a bird-like shape.
Food and Drug Administration 10903 New Hampshire Avenue Document Control Center - WO66-G609 Silver Spring, MD 20993-0002
December 1, 2014
Lexington International, LLC % Mr. Evan P. Phelps OFW Law 600 New Hampshire Avenue, NW, Suite 500 Washington, District of Columbia 20037
Re: K142573
Trade/Device Name: HairMax LaserComb 82 and HairMax LaserComb 41 Regulation Number: 21 CFR 890.5500 Regulation Name: Infrared lamp Regulatory Class: Class II Product Code: OAP Dated: September 12, 2014 Received: September 15, 2014
Dear Mr. Phelps:
We have reviewed your Section 510(k) premarket notification of intent to market the device referenced above and have determined the device is substantially equivalent (for the indications for use stated in the enclosure) to legally marketed predicate devices marketed in interstate commerce prior to May 28, 1976, the enactment date of the Medical Device Amendments, or to devices that have been reclassified in accordance with the provisions of the Federal Food, Drug, and Cosmetic Act (Act) that do not require approval of a premarket approval application (PMA). You may, therefore, market the device, subject to the general controls provisions of the Act. The general controls provisions of the Act include requirements for annual registration, listing of devices, good manufacturing practice, labeling, and prohibitions against misbranding and adulteration. Please note: CDRH does not evaluate information related to contract liability warranties. We remind you; however, that device labeling must be truthful and not misleading.
If your device is classified (see above) into either class II (Special Controls) or class III (PMA), it may be subject to additional controls. Existing major regulations affecting your device can be found in the Code of Federal Regulations, Title 21, Parts 800 to 898. In addition, FDA may publish further announcements concerning your device in the Federal Register.
Please be advised that FDA's issuance of a substantial equivalence determination does not mean that FDA has made a determination that your device complies with other requirements of the Act or any Federal statutes and regulations administered by other Federal agencies. You must comply with all the Act's requirements, including, but not limited to: registration and listing (21 CFR Part 807); labeling (21 CFR Part 801); medical device reporting (reporting of medical
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device-related adverse events) (21 CFR 803); good manufacturing practice requirements as set forth in the quality systems (QS) regulation (21 CFR Part 820); and if applicable, the electronic product radiation control provisions (Sections 531-542 of the Act); 21 CFR 1000-1050.
If you desire specific advice for your device on our labeling regulation (21 CFR Part 801), please contact the Division of Industry and Consumer Education at its toll-free number (800) 638-2041 or (301) 796-7100 or at its Internet address
http://www.fda.gov/MedicalDevices/Resourcesfor You/Industry/default.htm. Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21CFR Part 807.97). For questions regarding the reporting of adverse events under the MDR regulation (21 CFR Part 803), please go to
http://www.fda.gov/MedicalDevices/Safety/ReportaProblem/default.htm for the CDRH's Office of Surveillance and Biometrics/Division of Postmarket Surveillance.
You may obtain other general information on your responsibilities under the Act from the Division of Industry and Consumer Education at its toll-free number (800) 638-2041 or (301) 796-7100 or at its Internet address
http://www.fda.gov/MedicalDevices/ResourcesforYou/Industry/default.htm.
for
Sincerely yours,
# David Krause -S
Binita S. Ashar, M.D., M.B.A., F.A.C.S. Director Division of Surgical Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
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# Indications for Use
510(k) Number (if known) K142573
#### Device Name
Device Name: HairMax LaserComb 82 and HairMax LaserComb 41
Indications for Use (Describe)
The HairMax LaserComb 41 is indicated to treat Androgenetic alopecia and promote hair growth in males who have Norwood Hamilton Classifications of IIa to V patterns of hair loss and treat Androgenetic alopecia and, promote hair growth in females who have Ludwig (Savin) Scale I-4, II-1, II-2, or frontal, both with Fitzpatrick Skin Types I to IV.
The HairMax LaserComb 82 is indicated to treat Androgenetic alopecia and promote hair growth in males who have Norwood Hamilton Classifications of IIa to V patterns of hair loss and treat Androgenetic alopecia and, promote hair growth in females who have Ludwig (Savin) Scale 1-4, II-1, II-2, or frontal, both with Fitzpatrick Skin Types I to IV.
| Type of Use (Select one or both, as applicable) | |
|-------------------------------------------------|---------------------------------------------------------------|
| | <div style="display: flex;"> <div> </div> <div> </div> </div> |
| | Prescription Use (Part 21 CFR 801 Subpart D)
|X | Over-The-Counter Use (21 CFR 801 Subpart C)
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# 510(k) Summary
# "510(k) Summary" As required by section 807.92(c) For HairMax LaserComb 41 and HairMax LaserComb 82
### September 11, 2014
- 1. Company Name and Address
- a. Sponsor/Manufacturer
Lexington International, LLC 777 Yamato Road Suite 105 Boca Raton, FL 33431
- b. Consultant/Contact
Evan P. Phelps OFW Law 600 New Hampshire Ave, Ste. 500 Washington D.C. 20037 ephelps@ofwlaw.com Tel: (202) 789-1212 Fax: (202) 234-3550
- 2. Establishment Registration Number: 3006182775
- 3. Device Name:
| a. Trade Name: | HairMax LaserComb 41<br>HairMax LaserComb 82 |
|-------------------------|-------------------------------------------------|
| b. Common/Usual Name: | Lamp, Non-Heating, for Promotion of Hair Growth |
| c. Classification Name: | Comb, Laser, Hair |
## 4. Device Classification:
- 21 C.F.R. § 890.5500 (Class II) a.
- b. Product Code: OAP
- c. Classification Panel: General & Plastic Surgery
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#### 5. Legally Marketed Predicate Devices:
- a. HairMax LaserComb Lux 9 i. 510(k) Owner: Lexington International, LLC ii. 510(k) Number: K110233 21 C.F.R. § 890.5500 (Class II) Product Code: OAP b. HairMax LaserComb Lux 9 i. 510(k) Owner: ii. 510(k) Number: K103368
Lexington International, LLC 21 C.F.R. § 890.5500 (Class II) Product Code: OAP
#### 6. Device Description
The HairMax LaserComb 41 (HMLC 41) and HairMax LaserComb 82 (HMLC 82) are low-level laser devices that provide distributed laser light to the scalp while comb teeth simultaneously part the user's hair to ensure the laser light reaches the user's scalp. The HMLC 82 device emits 82 laser beams with wavelengths of 655 nm (+/- 10 nm), spaced at 7mm intervals and has a total laser module output within the limitation of a Class 3R laser. The HMLC 41 device emits 41 laser beams with wavelengths of 655 mm (+/- 10 nm), spaced at 7mm intervals and has a total laser module output within the limitation of a Class 3R laser. The laser diode modules used in the HMLC 41 & 82 are identical to those used in their predicate devices.
As with the predicate device, the HMLC 41 & 82's lasers are contained in between hair parting teeth that push the hair aside, allowing the optimum amount of laser energy to reach the scalp, as the user passes over the scalp. The hair parting teeth move the hair aside and allow an unobstructed path of laser energy to the scalp.
At the beginning of a treatment session, the device is placed in the first position on the scalp (the first 7.5cm scalp section, closest to the forehead) and will rest here for the intended treatment time. As with the predicate devices, the HMLC 41 & 82 will use a short vibration to advise the user it is time to move to the next scalp location. The HMLC 41 & 82 will maintain contact with the scalp allowing the hair parting teeth to part the hair as the user moves the device backwards, combing the hair, along the scalp to the second position. The teeth are necessary to part the hair and provide an unobstructed path for the laser light to reach the scalp. The device will remain in the second position until the vibration informs the user to move to the third position. Similar indication and movement will continue for three positions to cover the entire area of hair loss on the scalp. The lasers will automatically turn off after the intended treatment duration.
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The units operate from an internal, rechargeable lithium polymer battery. The LiPoly battery is charged from a Class 2, UL, and CUL rated wall transformer at 6VDC and 1000mA. In the event of a power failure, the laser control circuitry is designed to disable the laser diodes until reactivated by the control switch. The devices include battery monitoring and charging circuitry which ensure the effective delivery of optimal laser energy output during the treatment time. The devices include a proximity sensor and will not allow the lasers to be turned on unless in contact with the scalp.
- 7. Intended Use
The intended use of the HairMax LaserComb 41 and HairMax LaserComb 82 is the same as for the HairMax LaserComb Lux 9 (HMLC Lux 9) cleared pursuant to K103368 and K110233.
The HairMax LaserComb 41 is indicated to treat Androgenetic alopecia and promote hair growth in males who have Norwood Hamilton Classifications of IIa to V patterns of hair loss and treat Androgenetic alopecia and, promote hair growth in females who have Ludwig (Savin) Scale I-4, II-1, II-2, or frontal, both with Fitzpatrick Skin Types I to IV.
The HairMax LaserComb 82 is indicated to treat Androgenetic alopecia and promote hair growth in males who have Norwood Hamilton Classifications of IIa to V patterns of hair loss and treat Androgenetic alopecia and, promote hair growth in females who have Ludwig (Savin) Scale I-4, II-1, II-2, or frontal, both with Fitzpatrick Skin Types I to IV.
- 8. Technological Characteristics
The HMLC 41 & 82 are versions of Lexington's previously cleared HMLC Lux 9 that has been modified as a result of customer feedback to provide hands-free operation for ease of use. To address this issue and reduce the overall effort required by users, Lexington sought to: 1) modify the shape of the device such that it can rest on the scalp (without the need for the user to hold it in place with their hand) while maintaining the device's hair-parting teeth feature; and 2) reduce treatment time by increasing the number of lasers providing treatment over a larger surface area while maintaining dosage rate. The implemented modifications included changes to:
- Device configuration/dimensions to accommodate additional lasers and allow "handsfree" placement on the scalp;
- Addition of a second identical battery
- Conforming software changes reflecting reduced overall treatment time; and
- . Addition of a proximity sensor for laser activation.
Otherwise, the modified devices have the same technological characteristics as their predicate to include operating principle, fundamental scientific technology, design, materials, and chemical composition.
- 9. Performance
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Evidence of safety and efficacy was obtained from bench testing to support the intended use of this device to include:
- Laser Safety testing to confirm Class 3R operation per IEC60825-1:2007, Condition 1 and Condition 2
- Laser output parameters and dose rate were verified against the predicate device using -Ophir 7Z01560, Serial # 544640 with a last calibration date April 2014. Laser output levels were substantially the same to the predicate within the accepted +/-10 tolerance range of the laser specifications.
- HMLC 41 & 82 use identical laser modules as the Predicate Device. A review of the -Laser module specifications and Certificate of Compliance confirms wavelength, divergence and power levels to be identical.
The results of the testing demonstrate that the modified devices (HMLC 41 & 82) operated as intended and are as safe and effective as the predicate device.
Two short videos show you everything — or skip straight to the written tutorial if you'd rather read. You can reopen this any time from the Tutorial button in the top bar.
Part 1 — Search, results, and everyday workflows 16 min
Part 2 — Embeddings: the galaxy map 3 min
1. Search: exact and fuzzy
Type a phrase like "coronary artery calcification" into the search box. You get two kinds of results. Exact results match the literal phrase — prefix searches work ("coronary artery calcificati") but suffix searches do not. Fuzzy results match on the meaning and intent of your phrase rather than the exact words, and are sorted by relevance score. Hover over the Exact or Fuzzy badge on any row to see exactly why it matched.
Use the checkboxes above the results to narrow: SaMD keeps only software-only devices, AI / ML keeps only devices with AI.
Exact vs. fuzzy search: what's the difference?
Exact matches on the literal phrase (prefix search works, suffix does not). Fuzzy matches on the meaning and intent of the phrase rather than the exact words. Hover over the badge on any row to see why it matched.
You search "coronary artery calcification" and want only software devices with AI. What two filters do you apply?
Narrow by SaMD (software-only devices), then narrow by AI/ML (devices with AI).
2. The results table
Scroll right in the results table. The intended use is extracted for you — no need to open the PDF. The device story gives a high-level snapshot of what the device does and how it's used. The AI Performance sub-table shows each output name, acceptance criteria, observed values, and development/test dataset descriptions — the same format Innolitics uses for regulatory strategy outputs, and the fastest high-level fingerprint of an AI device. It is AI-generated but has been very reliable in practice.
Where do you find a device's intended use without opening the PDF?
Scroll right in the search results table. The intended use column is extracted for you; no need to dig into the 510(k) summary PDF.
What does the AI Performance sub-table show, and why is it useful?
Output name, acceptance criteria, observed values, development dataset description, and test dataset description. It's the same format we use for regulatory strategy output and Fast 510(k) input, and the fastest high-level fingerprint of an AI device. AI-generated but reliable in practice.
3. Judging fuzzy relevance
Fuzzy results trail off in relevance as you scroll. Use three signals to decide how far down to go: the fuzzy badge explanations, the intended use column, and whether your target output (e.g., Cobb angle) still appears in the AI Performance sub-table. Once it stops appearing, you're past the relevant zone. A top hit with a low score (~0.4) and a stretched explanation is a hint the closest predicates are far away — the project may be headed for De Novo. Note the fuzzy search is a pattern match: it doesn't handle negation ("not") well, and hardware devices can appear — filter by SaMD/AI ML to cut them.
How do you judge how far down fuzzy search results to go?
Use the relevancy signals: the fuzzy badge explanations, the intended use column, and whether the target output (e.g., Cobb angle) still appears in the AI Performance sub-table. Once it stops appearing, results are trailing off in relevancy.
4. Device detail page: chat and citations
Click a device name to open its detail page: device facts on the left, a chat window on the right. Ask something like "Describe the training data". The answer carries little citation bubbles — click one to jump to the highlighted passage in the source PDF, so you can verify every AI answer against the document. There's also a Download PDF button for sharing.
How do you verify an AI chat answer on the device detail page?
Click the citation bubbles to jump to the relevant highlight in the source document.
Reading rule for every project: how many summaries do you read in full?
At least the three most relevant 510(k) or De Novo summaries, in full. After that, use targeted chat questions to confirm your memory quickly. The tool supports this professional habit — it doesn't replace it.
5. Side-by-side comparison
Select multiple rows in the results table (aim for under ~10), then open the PDF Viewer tab. Ask one question — it goes to all selected devices in parallel, each with citations. This is the fastest way to compare and contrast devices: training data, PCCP scope, how they handled adding new scanners, and so on.
What does the side-by-side PDF viewer mode do?
Select multiple devices, open the PDF viewer tab, and ask one question (e.g., "Describe the training data"). It queries all selected devices simultaneously with citations, so you can compare and contrast quickly.
6. Collections
With rows selected, go to the Collections tab and create a labeled collection (e.g., "Cobb Angle Project"). Reload that selection any time — before a client call, pull up the collection and ask questions across all of its devices at once.
How do you save a set of selected devices for later use?
Select the rows, go to the Collections tab, and create a labeled collection (e.g., "Cobb Angle Project"). You can reload the selection anytime and carry it into the PDF viewer and other tabs that support selections.
7. Product codes and the regulations tree
Click a product code in the results to jump to it in the regulations tree — identification text, sibling product codes, and devices you can open in a PDF viewer on the right. Click a regulation number to see its identification, special controls, and related product codes. You can also search by product code or regulation number at the top of the tree. Always read the special controls if any exist for your device — it broadens your search and sharpens pre-kickoff research.
What can you do from the regulations tree view?
Browse product codes and regulation numbers, read the identification text and special controls, browse sibling product codes, open device PDFs on the right, and search by product code or regulation number at the top of the tree.
8. Chart view
Click Show Chart and segment by regulation number (or product code) to see which regulations dominate your result set. Clicking a regulation takes you into the regulations tree. Great for spotting that most matches are, say, hardware laparoscopic devices — a cue to go back and filter.
How do you see which regulations dominate a search result set?
Click "Show Chart" and segment by Regulation Number. Clicking a regulation takes you to the regulations tree.
9. The predicate graph
Open the Predicates tab for a family-tree view of predicate relationships. Click a node to trace its parents and children; selections from search carry over pre-selected. Commonly predicated devices are worth reading — a lot of people predicated them for a reason. The visual lineage is also handy on client calls, e.g. to show how a predicate family evolved and justify why your predicate still holds.
In the predicate graph, why are commonly predicated devices worth reading?
A lot of people predicated them for a reason. Clicking a node traces parents and children, and selections from search carry over pre-selected.
10. Embeddings: the galaxy map
The Embeddings tab plots every matching document in a 2-D "galaxy map" where semantically similar devices cluster together. Hover or click clusters to explore, and let AI label the clusters for you. Embeddings beat product codes for grouping: two devices can carry different product codes (LLZ vs. QIH) yet do the same thing — the embedding captures the meaning of the intended use and device story. This is also exactly how retrieval-augmented generation (RAG) works under the hood, and it makes a great visual on client calls.
Try it yourself
Head to the search page and work through a few of these AI/ML fuzzy searches to build intuition: perivascular fat on CT · aortic valve calcification opportunistic screening on noncontrast CT · breast cancer prediction on digital pathology slides · autism detection · gestational age prediction · a hearing aid that can also detect a pulse · foundation model based analysis of ECG · large language models · penetration test. Watch how the relevance scores, intended use, and AI Performance tables tell you when results stop being meaningful.