WALTER K NAHM MD PHD INC
WALTER K NAHM MD PHD INC is an organization registered with the National Plan and Provider Enumeration System (NPPES) under NPI 1720110968, based in San Diego, CA. The organization lists 3 taxonomy classifications, with MOHS-Micrographic Surgery Physician recorded as primary.
Getting there
The practice address on file is 7695 CARDINAL CT STE 200, San Diego, CA 92123. We have not yet mapped what surrounds this office — parking, transit, and nearby pharmacies are added as our data collection reaches each location.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| A78569 | CA | MOHS-Micrographic Surgery Physician primary |
| A78569 | CA | Dermatology Physician |
| A78569 | CA | Procedural Dermatology Physician |
This provider holds licence A78569 issued in CA. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
- Status
- Approved
- Provider type
- Part B Supplier - Clinic/group Practice
- PAC ID
- 8527968452
Enrolled in Medicare 2 times, across 1 state:
| State | Enrollment ID | Provider type |
|---|---|---|
| California | O20040108001153 | Part B Supplier - Clinic/group Practice |
| California | O20210709000515 | Dme Supplier - Physician - Dermatology |
Medicare enrolment is recorded as approved under the provider type Part B Supplier - Clinic/group Practice. There are 2 separate enrolment records. Multiple enrolments usually mean the provider bills Medicare from more than one practice location, or has kept an earlier enrolment after moving. Each record carries its own enrolment ID, listed above. Being enrolled means the provider can bill Medicare; it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
What MOHS-Micrographic Surgery covers
The highly-trained surgeons that perform Mohs Micrographic Surgery are specialists both in dermatology and pathology. With their extensive knowledge of the skin and unique pathological skills, they are able to remove only diseased tissue, preserving healthy tissue and minimizing the cosmetic impact of the surgery. Mohs surgeons who belong to the American College of Mohs Surgery (ACMS) have completed a minimum of one year of fellowship training at one of the ACMS-approved training centers in the U.S. NUCC Health Care Provider Taxonomy, code 207ND0101X
All registered taxonomy codes
This provider registers 3 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 207ND0101X | MOHS-Micrographic Surgery Physician MOHS-Micrographic Surgery | A78569 | CA | primary |
| 207N00000X | Dermatology Physician | A78569 | CA | |
| 207NS0135X | Procedural Dermatology Physician Procedural Dermatology | A78569 | CA |
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-2 identifies an organization — a clinic, hospital, group practice, laboratory, or supplier. Individual clinicians working there hold their own NPI-1 numbers separately, so a bill may reference both.
| NPI | 1720110968 valid check digit |
|---|---|
| Entity type | Organization (NPI-2) |
| Enumeration date | Mar 12, 2007 |
| Last updated | Jul 20, 2021 |
| Status | Active |
| Practice address |
7695 CARDINAL CT STE 200 San Diego, CA 92123 (858) 278-8835 Fax (858) 386-4776 |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 7 | 2 | 0 | 1 | 1 | 0 | 9 | 6 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 7 | 4 | 0 | 2 | 1 | 0 | 9 | 3 |
Sum = 52 · next multiple of 10 = 60 · check digit = 8 · actual last digit = 8
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.