David Giangreco, M.D.
David Giangreco, M.D. is a Rheumatology Physician in Geneva, IL, registered under NPI 1285861179. This provider registers 2 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
The practice address on file is 302 RANDALL RD SUITE 307B, Geneva, IL 60134. 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 |
|---|---|---|
| 036129016 | IL | Rheumatology Physician primary |
| 125.056129 | IL | Internal Medicine Physician |
This provider holds licence 036129016 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 - Rheumatology
- PAC ID
- 2466676671
Medicare enrolment is recorded as approved under the provider type Practitioner - Rheumatology. This means the provider is enrolled to bill Medicare, though it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
What Rheumatology covers
An internist who treats diseases of joints, muscle, bones and tendons. This specialist diagnoses and treats arthritis, back pain, muscle strains, common athletic injuries and "collagen" diseases. NUCC Health Care Provider Taxonomy, code 207RR0500X
All registered taxonomy codes
This provider registers 2 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 207RR0500X | Rheumatology Physician Rheumatology | 036129016 | IL | primary |
| 207R00000X | Internal Medicine Physician | 125.056129 | IL |
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 | 1285861179 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jun 17, 2009 |
| Last updated | Jan 22, 2016 |
| Status | Active |
| Sole proprietor | No |
| Credential | M.D. |
| Practice address |
302 RANDALL RD SUITE 307B Geneva, IL 60134 (630) 232-2391 Fax (630) 232-2472 |
| Other identifiers |
F400259766
· MEDICARE PTAN (INDIVIDUAL) (IL) 206147 · MEDICARE PTAN (GROUP) (IL) |
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 | 8 | 5 | 8 | 6 | 1 | 1 | 7 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 2 | 7 | 5 | 7 | 6 | 2 | 1 | 5 |
Sum = 61 · next multiple of 10 = 70 · check digit = 9 · actual last digit = 9
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.