Ellen Gustafson, MD
Ellen Gustafson, MD is a Hematology & Oncology Physician in Joliet, IL, registered under NPI 1245296896.
Getting there
The practice address on file is 2614 W JEFFERSON ST, Joliet, IL 60435. 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 |
|---|---|---|
| 036109139 | IL | Hematology & Oncology Physician primary |
This provider holds licence 036109139 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 - Hematology/oncology
- PAC ID
- 3971512708
Medicare enrolment is recorded as approved under the provider type Practitioner - Hematology/oncology. 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 Hematology & Oncology covers
An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered. NUCC Health Care Provider Taxonomy, code 207RH0003X
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 | 1245296896 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Apr 24, 2006 |
| Last updated | Apr 25, 2025 |
| Status | Active |
| Sole proprietor | No |
| Credential | MD |
| Practice address |
2614 W JEFFERSON ST Joliet, IL 60435 (815) 725-1355 Fax (815) 725-9857 |
| Mailing address |
1860 PAYSPHERE CIR Chicago, IL 60674 |
| Other identifiers |
K26698
· MEDICARE INDIV ID# FOR GROUP 208256 (IL) K26699 · MEDICARE INDIV ID# FOR GROUP 336140 (IL) 036109139 (IL) K26697 · MEDICARE INDIV ID# FOR GROUP 205474 (IL) P00307129 · MEDICARE RR (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 | 4 | 5 | 2 | 9 | 6 | 8 | 9 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 2 | 8 | 5 | 4 | 9 | 3 | 8 | 9 |
Sum = 74 · next multiple of 10 = 80 · 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.