Allison Malick, MD
Allison Malick, MD is a Physician Nutrition Specialist (Internal Medicine) in Chicago, IL, registered under NPI 1629609664. 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 5841 S MARYLAND AVE # 4076, Chicago, IL 60637. 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 |
|---|---|---|
| 125087219 | IL | Physician Nutrition Specialist (Internal… primary |
This provider holds licence 125087219 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
- Order And Referring Only - Internal Medicine
- PAC ID
- 4284091992
- Enrollment ID
- I20230611000182
Medicare enrolment is recorded as approved under the provider type Order And Referring Only - Internal Medicine. 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 Physician Nutrition Specialist covers
A physician who specializes in the diagnosis and treatment of primary nutritional diseases (e.g., undernutrition, overnutrition, and genetic or acquired errors of metabolism) and adjunctive nutritional therapeutics (e.g., nutritional therapy or support of diseases states with a metabolic component). Physician Nutrition Specialists also provide services for nutritional disease prevention, including diabetes, cancer, Alzheimer’s, hospital malnutrition screening, and perioperative nutrition. NUCC Health Care Provider Taxonomy, code 207RP1002X
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 | 1629609664 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jan 29, 2020 |
| Last updated | Jun 17, 2026 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Female |
| Credential | MD |
| Practice address |
5841 S MARYLAND AVE # 4076 Chicago, IL 60637 (773) 795-1824 Fax (773) 702-2182 |
| Mailing address |
180 HARVESTER DR STE 110 Burr Ridge, IL 60527 |
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 | 6 | 2 | 9 | 6 | 0 | 9 | 6 | 6 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 6 | 4 | 9 | 3 | 0 | 9 | 6 | 3 |
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.