Muhammad Shahmir Abbasi, M.D.
NPI 1598408866 · Geriatric Medicine (Internal Medicine) Physician · Chicago, IL
Enrolled with Medicare as Order and Referring Only - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Muhammad Shahmir Abbasi, M.D. is a Geriatric Medicine (Internal Medicine) Physician provider in Chicago, IL (NPI 1598408866).
Provider details
- NPI number
- 1598408866
- Entity type
- Individual
- Primary specialty
- Geriatric Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 036175742 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
4 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
3 documented practice locations
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 4 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Atorvastatin Calcium | 17 |
| Losartan Potassium | 15 |
| Levothyroxine Sodium | 11 |
| Metoprolol Succinate | 11 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Additional practice locations (2)
- 6565 N. Charles Street Ste 203Towson, MD 21204Phone: (443) 894-3760Fax: (443) 849-8138
- 1 Medical DrLebanon, NH 03756-1000Phone: (603) 650-5000
Registry dates
- Enumerated
- 2022-04-15
- Last updated
- 2025-07-07
- Certified
- 2025-07-07
Frequently asked questions
- What is Muhammad Shahmir Abbasi's NPI number?
- Muhammad Shahmir Abbasi's National Provider Identifier (NPI) is 1598408866, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Muhammad Shahmir Abbasi's specialty?
- Muhammad Shahmir Abbasi is listed in the NPPES registry with a primary specialty of Geriatric Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Muhammad Shahmir Abbasi located?
- Muhammad Shahmir Abbasi's practice location on file with NPPES is 1620 W Harrison St, Chicago, IL 60612-3801.
- What is Muhammad Shahmir Abbasi's phone number?
- The practice phone number listed in the NPPES registry for Muhammad Shahmir Abbasi is (312) 942-5000.
- Does Muhammad Shahmir Abbasi accept Medicare?
- Muhammad Shahmir Abbasi is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Muhammad Shahmir Abbasi's NPI active?
- Yes — Muhammad Shahmir Abbasi's NPI (1598408866) is active in the NPPES registry as of the last update on 2025-07-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.