David Tartof, MD., PH.D., INC
David Tartof, MD., PH.D., INC is a Rheumatology Physician in Chicago, IL, registered under NPI 1811974314.
Getting there
The practice address on file is 2525 S MICHIGAN AVE DOCTORS OFFICE CENTER - 2ND FLOOR, Chicago, IL 60616. 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 |
|---|---|---|
| 036044364 | IL | Rheumatology Physician primary |
This provider holds licence 036044364 issued in IL. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
This NPI does not appear in the PECOS Medicare enrolment file. Providers who do not bill Medicare — or who bill only through a group's enrolment — will not appear here. It is not a sign of any problem with the registration.
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
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 | 1811974314 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Dec 27, 2005 |
| Last updated | Sep 9, 2008 |
| Status | Active |
| Sole proprietor | No |
| Credential | MD., PH.D., INC |
| Practice address |
2525 S MICHIGAN AVE DOCTORS OFFICE CENTER - 2ND FLOOR Chicago, IL 60616 (312) 315-5115 Fax (312) 986-8694 |
| Mailing address |
5511 S KIMBARK AVE Chicago, IL 60637 |
| Other identifiers |
036044364
· Medicaid (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 | 8 | 1 | 1 | 9 | 7 | 4 | 3 | 1 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 8 | 2 | 1 | 9 | 7 | 8 | 3 | 2 |
Sum = 66 · next multiple of 10 = 70 · check digit = 4 · actual last digit = 4
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.