Zain Ahsan, DO
NPI 1740919588 · Internal Medicine Physician · Chicago, IL
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Zain Ahsan, DO is a Internal Medicine Physician provider in Chicago, IL (NPI 1740919588).
Provider details
- NPI number
- 1740919588
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- Yes
- License
- R3747 (AZ)
Specialties & taxonomies
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
4 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 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 (1)
- 5700 Az-90Sierra Vista, AZ 85635Phone: (520) 263-2000
Registry dates
- Enumerated
- 2022-06-07
- Last updated
- 2025-07-30
- Certified
- 2025-07-30
Frequently asked questions
- What is Zain Ahsan's NPI number?
- Zain Ahsan's National Provider Identifier (NPI) is 1740919588, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Zain Ahsan's specialty?
- Zain Ahsan is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Zain Ahsan located?
- Zain Ahsan's practice location on file with NPPES is 1500 S Fairfield Ave, Chicago, IL 60608-1782.
- What is Zain Ahsan's phone number?
- The practice phone number listed in the NPPES registry for Zain Ahsan is (773) 542-2000.
- Does Zain Ahsan accept Medicare?
- Zain Ahsan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Zain Ahsan's NPI active?
- Yes — Zain Ahsan's NPI (1740919588) is active in the NPPES registry as of the last update on 2025-07-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.