Medicare Enrolled
Dr. Walter Nahm, M.D., PHD.
MOHS-Micrographic Surgery Physician · San Diego, CA
Practice pattern: Mixed Practice
— Diverse clinical practice across multiple procedure types
Low-engagement
Very High
DATA COVERAGE
Data in 4 of 4 federal sources
Measures public federal data availability — not provider quality
Informational, not a quality rating.
This page presents federal public records about Dr. Nahm from CMS (NPPES, Open Payments, Medicare Provider Utilization, PECOS). It is not medical advice, an endorsement, or a judgment of clinical quality. Always consult the provider directly and a licensed clinician for medical decisions. Read methodology →
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What this data tells you about Dr. Nahm
Dr. Walter Nahm is a mohs-micrographic surgery physician in San Diego, CA, with 20 years of NPI registration. Based on federal Medicare data, Dr. Nahm performed 26,935 Medicare services across 3,492 unique beneficiaries.
Between the years covered by Open Payments, Dr. Nahm received a total of $4,280 from 13 pharmaceutical and/or device companies across 44 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in mohs-micrographic surgery physician. Most payments are for meals and travel — low-value interactions common across virtually all practicing physicians. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Nahm is Very High — reflecting how much public federal data is available about this provider. Patients are encouraged to use this data as one of several factors when choosing a healthcare provider.
✓ 20 years in practice
▲ Top 2% volume in CA
$4,280 industry payments
Medicare Practice Summary
Medicare Utilization ↗26,935
Medicare services
Top 2% in CA for mohs-micrographic surgery physician
3,492
Unique beneficiaries
$115
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~1,347 Medicare services per year of practice
Top procedures by volume
Ranked by number of services performed for Medicare patients. Avg. submitted charge is what the provider billed; avg. Medicare payment is what CMS paid.
| Procedure | Volume | Avg. paid | Avg. submitted |
|---|---|---|---|
| Theraskin application, per square centimeter Application of Theraskin, a skin substitute, measured by each square centimeter of surface area treated. |
6,425 | $36 | $900 |
| Epifix, per square centimeter | 3,183 | $119 | $1,500 |
| Amniotic membrane graft, per square centimeter Application of amniotic membrane tissue to a wound or surgical site. The graft is measured and billed based on the surface area covered in square centimeters. |
2,643 | $79 | $900 |
| Puraply AM application per square centimeter Application of Puraply AM dressing to the skin. The charge is calculated based on the surface area treated. |
1,625 | $83 | $900 |
| Cogenex amniotic membrane, per square centimeter This code represents the application of Cogenex, a processed amniotic membrane product, measured by each square centimeter used during a procedure. |
1,617 | $148 | $4,500 |
| Tissue pathology examination, moderate complexity A laboratory test where a pathologist examines tissue samples under a microscope to analyze cellular details. This intermediate complexity procedure involves specialized techniques to identify abnormalities in the tissue. |
1,434 | $32 | $267 |
| Office visit, established patient (30-39 min) A follow-up office visit for an existing patient lasting between 30 and 39 minutes. The visit involves medical evaluation and management of the patient's condition. |
1,192 | $102 | $333 |
| Destruction of 15 or more precancerous skin growths This procedure involves the removal or destruction of fifteen or more precancerous skin lesions. It is performed to treat abnormal skin cells that have the potential to develop into cancer. |
893 | $150 | $475 |
| Destruction of skin growth, 15 or more growths | 892 | $121 | $428 |
| Puraply xt, per square centimeter | 713 | $119 | $3,951 |
| Epicord application, per square centimeter Application of a biological dressing to the skin surface, measured by area. |
658 | $190 | $900 |
| Steroid injection (triamcinolone) A 10 mg injection of triamcinolone acetonide, a corticosteroid medication. This code specifies the drug and dosage administered. |
648 | $1 | $14 |
| Revita dermal filler injection, per square centimeter Injection of Revita dermal filler into the skin, measured by the area treated in square centimeters. |
552 | $510 | $2,500 |
| Laser treatment for inflammatory skin disease, >500 sq cm This procedure uses a laser to treat inflammatory skin conditions covering an area larger than 500 square centimeters. |
495 | $211 | $770 |
| Skin substitute graft application, 25 sq cm or less Application of a skin substitute graft to a wound on the face, scalp, eyelids, mouth, neck, ears, around eyes, genitals, hands, feet, fingers, or toes. The wound area covered is 25.0 square centimeters or less. |
411 | $141 | $397 |
| Skin substitute graft application, 25 sq cm or less Application of a skin substitute graft to a wound on the trunk, arms, or legs covering 25 square centimeters or less. |
401 | $138 | $900 |
| Skin graft site preparation, trunk/arms/legs Preparation of the skin area on the trunk, arms, or legs to receive a skin graft. This procedure is specified for infants and children covering 100.0 square centimeters or 1% of body area or less. |
395 | $306 | $1,101 |
| Skin graft site preparation, face or scalp, 100 sq cm or less Preparation of the skin area on the face, scalp, or other specified body parts to receive a skin graft in infants and children. The area prepared is 100 square centimeters or 1% of the body surface area, whichever is less. |
381 | $349 | $1,267 |
| Corplex per square centimeter A unit of measurement for the Corplex procedure, calculated per square centimeter of the treated area. |
331 | $215 | $1,500 |
| Shaving of skin growth, more than 2.0 cm Removal of a skin growth by shaving the surface with a blade. This procedure is performed on the body, arms, or legs when the growth exceeds 2.0 centimeters. |
277 | $114 | $413 |
| Office visit, established patient (20-29 min) An office visit for an existing patient lasting between 20 and 29 minutes. The visit involves medical evaluation and management of the patient's condition. |
225 | $75 | $227 |
| Skin growth biopsy, first lesion A minor surgical procedure to remove a small sample of tissue from a skin growth for laboratory examination. |
221 | $126 | $275 |
| Shaving of skin growth on face or mouth, larger than 2.0 cm This procedure involves shaving off a skin growth located on the face, ears, eyelids, nose, lips, or mouth. The growth being removed is larger than 2.0 centimeters in size. |
159 | $156 | $595 |
| Skin graft repair, 10.1-30 sq cm A surgical procedure to repair wounds on the forehead, cheeks, chin, mouth, neck, underarms, genitals, hands, or feet by transferring skin. The graft covers an area between 10.1 and 30.0 square centimeters. |
123 | $659 | $2,969 |
| Shaving of skin growth, larger than 2.0 cm This procedure involves the removal of a skin growth by shaving it off. It is performed on areas such as the scalp, neck, hands, feet, or genitals when the growth exceeds 2.0 cm in size. |
118 | $100 | $489 |
| Skin growth removal and lab exam, 1-5 blocks This procedure involves the removal of a growth from the head, neck, hands, feet, or genitals. The removed tissue is then examined under a microscope in the laboratory. |
113 | $610 | $2,076 |
| New patient office visit (45-59 min) An initial office visit for a new patient lasting between 45 and 59 minutes. This code covers the total time spent by the physician or qualified healthcare professional on the date of the encounter. |
106 | $116 | $350 |
| Removal and microscopic exam of growth of head, neck, hands, feet, or genitals, each additional stage, 1-5 tissue blocks | 77 | $376 | $1,249 |
| Skin growth removal and lab exam, 1-5 blocks A procedure to remove a growth from the trunk, arms, or legs and send 1 to 5 tissue samples to a laboratory for microscopic examination. |
74 | $577 | $1,896 |
| Shaving of skin growth, 1.1-2.0 cm This procedure involves shaving off a skin growth measuring between 1.1 and 2.0 centimeters from the body, arms, or legs. |
73 | $63 | $371 |
| Injection into skin growths, more than 7 A procedure involving the injection of medication into more than seven skin growths. |
67 | $61 | $219 |
| Intraoperative pathology examination, first tissue block A pathologist examines a tissue sample removed during surgery to provide a preliminary diagnosis. This test is performed on the first tissue block obtained from the procedure. |
64 | $92 | $316 |
| Skin biopsy, tangential A procedure to remove a sample of the first identified skin growth for laboratory examination. |
61 | $47 | $150 |
| Additional Mohs surgery stage with microscopic exam This procedure involves the removal and microscopic examination of an additional stage of tissue from the trunk, arms, or legs. It is performed in stages to ensure complete removal of the growth. |
49 | $361 | $1,158 |
| Skin graft repair of trunk, 10.1-30 sq cm A surgical procedure to repair a wound on the trunk by transferring skin from another area. The graft covers a surface area between 10.1 and 30.0 square centimeters. |
48 | $560 | $2,520 |
| Skin graft for scalp, arm, or leg wound, 10.1-30 sq cm This procedure involves repairing a wound on the scalp, arms, or legs by transferring skin from another area to cover the defect. The graft size is between 10.1 and 30.0 square centimeters. |
45 | $603 | $2,748 |
| Shaving of skin growth, 1.1-2.0 cm Removal of a skin growth by shaving the surface of the skin. The procedure is performed on the face, ears, eyelids, nose, lips, or mouth and involves a lesion measuring between 1.1 and 2.0 centimeters. |
38 | $77 | $425 |
| Complex or multiple skin abscess drainage A procedure to drain one or more skin abscesses that are complex in nature. This involves opening and cleaning the infected pockets under the skin. |
32 | $189 | $724 |
| Complex wound repair, 1.1-2.5 cm A surgical procedure to close a complex wound measuring between 1.1 and 2.5 centimeters on areas such as the face, neck, hands, or feet. |
20 | $202 | $1,228 |
| Skin graft repair, 10 sq cm or less A surgical procedure to repair a wound by transferring a small piece of skin to the affected area. The graft covers wounds on the face, neck, hands, feet, or other specified body parts. |
18 | $537 | $2,409 |
| Shaving of skin growth, 1.1-2.0 cm Removal of a skin growth by shaving the surface. The procedure is performed on the scalp, neck, hands, feet, or genitals and involves a lesion measuring between 1.1 and 2.0 centimeters. |
14 | $64 | $381 |
| Punch biopsy of first skin growth A small, circular piece of skin is removed from a skin growth using a circular blade. The sample is then sent to a laboratory for examination. |
12 | $97 | $250 |
| New patient office visit (30-44 min) An initial office visit for a new patient lasting between 30 and 44 minutes. This code is used when the total time spent on the date of the encounter falls within this range. |
12 | $73 | $336 |
How to read this data: This reflects Medicare patients only (typically 65+). Payment amounts are what Medicare paid the provider, not your out-of-pocket cost. A higher procedure volume generally indicates more experience with that procedure.
0.2% high complexity
5.8% medium
94.0% routine
Industry Payment Transparency
Open Payments through 2024 ↗$4,280
Total received (2018-2024)
Avg $713/year across 6 years
Top 35% in CA for mohs-micrographic surgery physician
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
13
Companies
44
Individual payments
All payments are legal and publicly reported · Not evidence of wrongdoing · How to interpret →
Payment profile
Industry payments classified by relationship type. Not all payments are equal — research and consulting reflect different relationships than speaking programs or meals.
Meals & Travel
Food, beverages, travel, and lodging — typically low-value
$3,402 (79.5%)
Other
Charitable contributions, space rental, and other categories
$753 (17.6%)
Speaking / Promotional
Speaker programs, honoraria, and industry-sponsored educational events
$124 (2.9%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$504
2023
$533
2022
$46
2021
$219
2019
$1,021
2018
$1,956
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
Integra LifeSciences Corporation
$245
Arcutis Biotherapeutics, Inc.
$138
Janssen Biotech, Inc.
$99
LifeNet Health
$22
Top 3 companies account for 95.7% of 2024 payments
All-time payments by company (2018-2024) ›
UCB SA
$1,875
PFIZER INC.
$983
Integra LifeSciences Corporation
$784
Arcutis Biotherapeutics, Inc.
$138
Misonix Inc
$133
Janssen Biotech, Inc.
$99
Novartis Pharmaceuticals Corporation
$61
LEO Pharma Inc.
$54
Bausch Health US, LLC
$45
Galderma Laboratories, L.P.
$41
Regeneron Healthcare Solutions, Inc.
$29
LifeNet Health
$22
Acera Surgical, Inc.
$16
Top 3 companies account for 85.1% of all-time payments
Associated products mentioned in payments ›
ACell · COSENTYX · DUPIXENT DUPILUMAB INJECTION · EUCRISA · Integra · ORACEA · PICATO · Restrata Wound Matrix · TREMFYA · TheraGenesis Wound Matrix · Zoryve
Should you be concerned? Payments from pharmaceutical and device companies are legal and common — 57% of U.S. physicians receive at least one. They often reflect legitimate consulting, research, or education. What matters is whether a recommended drug or device appears in your doctor's payment records. If so, consider asking your doctor about it. How to interpret this data →
Most payments (80%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians.
Geographic Context
Mohs-micrographic surgery physicians within 10 mi
19
Per 100K population
0.6
County median income
$102,285
Nearest hospital
SHARP MEMORIAL HOSPITAL
0.0 mi
0.0 mi
Data Sources
| Provider Registry | ✓ NPPES | Weekly updates |
| Medicare Enrollment | ✓ PECOS | Monthly updates |
| Practice Data | ✓ Medicare Util. | Annual (CY lag) |
| Industry Payments | ✓ Open Payments | CY 2024 |
| Disciplinary History | — Not public | N/A |
This provider has data in 4 of 4 available federal datasets, with a Data Coverage level of Very High. This reflects how much public data is available about a provider. How we calculate this →
Summary
Dr. Nahm is a mixed practice specialist, with above-average Medicare volume (top 2% in CA), with low-engagement industry engagement, with 20 years of NPI registration.
This summary is auto-generated from federal data, describing data availability and patterns. Read our methodology →
Frequently Asked Questions
Is Dr. Nahm experienced with theraskin application, per square centimeter?
Based on Medicare claims data, Dr. Nahm performed 6,425 theraskin application, per square centimeter services. Research suggests that higher procedure volume is often associated with better outcomes, particularly for complex procedures. Note that Medicare data only captures patients aged 65 and older, so the total practice volume across all patients is likely higher.
Does Dr. Nahm receive payments from pharmaceutical companies?
Yes. Dr. Nahm received a total of $4,280 from 13 companies across 44 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common among physicians — 57% of all U.S. physicians receive at least one industry payment. Patients may wish to ask their doctor about these relationships, especially if a recommended drug or device appears in the payment records.
How do Dr. Nahm's costs compare to other mohs-micrographic surgery physicians in San Diego?
Dr. Nahm's average Medicare payment per service is $115. Note that these figures represent what Medicare pays, not your out-of-pocket cost, which depends on your specific insurance plan and deductible. Procedure-level data above shows both what was submitted and what Medicare paid for each service type.
What does Data Coverage mean?
Data Coverage (currently Very High for Dr. Nahm) measures how much public federal data is available about a provider. It is not a quality rating. A "Very High" or "High" level means the provider has data across multiple federal sources (NPPES, PECOS, Medicare Utilization, Open Payments), indicating a long track record of practice, Medicare participation, and industry disclosure. A "Low" or "Moderate" level may simply mean the provider is newer, does not see Medicare patients, or has not received any industry payments — none of which are inherently negative. Read our full methodology →
Is this data up to date?
Each data source has its own update cycle. Provider registry data (NPPES) is updated weekly. Medicare enrollment (PECOS) is updated monthly. Medicare practice data has a ~2 year lag — the most recent available is typically 2 years prior. Industry payment data (Open Payments) is published annually, usually in June, covering the prior calendar year. We display the data date prominently on each section so you always know how current it is. See our data freshness policy →
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About this page
All data on this page is sourced verbatim from public federal records published by the U.S. Centers for Medicare & Medicaid Services (CMS): NPPES ↗, Open Payments ↗, Medicare Provider Utilization ↗, and PECOS. Publication is mandated by the Physician Payments Sunshine Act (§6002 ACA, 42 U.S.C. §1320a-7h) and the Freedom of Information Act.
This page is not medical advice, an endorsement, a recommendation, or a quality rating. Data Coverage reflects data completeness — how much federal information exists for this provider — not clinical performance, patient outcomes, or quality of care. Always verify information directly with the provider and consult a licensed clinician before making medical decisions.
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