Syed Zahir, D.O.
NPI 1649666900 · Internal Medicine Physician · Olympia Fields, IL
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Syed Zahir, D.O. is a Internal Medicine Physician provider in Olympia Fields, IL (NPI 1649666900).
Provider details
- NPI number
- 1649666900
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 04430 (KY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
11 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
8 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.
Practice location
Mailing address
Additional practice locations (7)
- 4500 Memorial DrBelleville, IL 62226-5360Phone: (618) 257-6220
- 405 W Jackson StCarbondale, IL 62901-1462Phone: (618) 549-0721
- 1 Ingalls DrHarvey, IL 60426-3558Phone: (708) 333-2300
- 201 S 14th StHerrin, IL 62948-3631Phone: (618) 942-2171
- 1000 Health Center DrMattoon, IL 61938-4644Phone: (217) 238-4325Fax: (217) 348-4290
- 2 S Hospital DrMurphysboro, IL 62966-3333Phone: (618) 684-3156
- 911 Bypass Rd Bldg aPikeville, KY 41501-1689Phone: (606) 218-3500Fax: (606) 218-4697
Registry dates
- Enumerated
- 2015-04-13
- Last updated
- 2025-06-23
- Certified
- 2025-06-23
Frequently asked questions
- What is Syed Zahir's NPI number?
- Syed Zahir's National Provider Identifier (NPI) is 1649666900, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Syed Zahir's specialty?
- Syed Zahir is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Syed Zahir located?
- Syed Zahir's practice location on file with NPPES is 20201 Crawford Ave, Olympia Fields, IL 60461-1010.
- What is Syed Zahir's phone number?
- The practice phone number listed in the NPPES registry for Syed Zahir is (844) 740-4445.
- Does Syed Zahir accept Medicare?
- Syed Zahir is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Syed Zahir's NPI active?
- Yes — Syed Zahir's NPI (1649666900) is active in the NPPES registry as of the last update on 2025-06-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.