George Nahass, M.D.
George Nahass, M.D. is a Dermatopathology Physician in Glen Carbon, IL, registered under NPI 1215902986. NPPES records them as a sole proprietor, meaning the practice is not incorporated as a separate legal entity.
Getting there
The practice address on file is 4573 BENES AVE, Glen Carbon, IL 64064. 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 |
|---|---|---|
| 036094700 | IL | Dermatopathology Physician primary |
This provider holds licence 036094700 issued in IL. 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
- Practitioner - Dermatology
- PAC ID
- 3476585167
Enrolled in Medicare 2 times, across 2 states:
| State | Enrollment ID | Provider type |
|---|---|---|
| Illinois | I20050908000440 | Practitioner - Dermatology |
| New York | I20250922000645 | Practitioner - Dermatology |
Medicare enrolment is recorded as approved under the provider type Practitioner - Dermatology. There are 2 separate enrolment records across 2 states (IL, NY). 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 Dermatopathology covers
A dermatopathologist has the expertise to diagnose and monitor diseases of the skin including infectious, immunologic, degenerative and neoplastic diseases. This entails the examination and interpretation of specially prepared tissue sections, cellular scrapings and smears of skin lesions by means of routine and special (electron and fluorescent) microscopes. NUCC Health Care Provider Taxonomy, code 207ND0900X
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-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.
| NPI | 1215902986 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Feb 17, 2006 |
| Last updated | Apr 24, 2024 |
| Status | Active |
| Sole proprietor | Yes |
| Credential | M.D. |
| Practice address |
4573 BENES AVE Glen Carbon, IL 64064 (618) 961-1950 |
| Mailing address |
2 CARLSON PKWY N STE 240 Plymouth, MN 55447 |
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 | 2 | 1 | 5 | 9 | 0 | 2 | 9 | 8 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 2 | 2 | 5 | 9 | 0 | 4 | 9 | 7 |
Sum = 64 · next multiple of 10 = 70 · check digit = 6 · actual last digit = 6
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.