Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Zain Bin Ahsan, DO

Individual provider Internal Medicine Physician · NPI 1740919588

Zain Bin Ahsan, DO is an Internal Medicine in Chicago, Illinois. Qualified in 2022, 4 years ago. Practices with Mount Sinai Community Foundation, a 246-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Arizona and Illinois.

Years since qualifying
4
Licensed in
AZ, IL
In the registry since
2022
Specialties on file
2
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

1500 S Fairfield Ave
Chicago, IL 60608-1782
Phone: (773) 542-2000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 5700 Az-90, Sierra Vista, AZ 85635 — (520) 263-2000

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 036176169 (IL)
Internal Medicine Physician Taxonomy 207R00000X · Licence R3747 (AZ)

Record details

NPI number1740919588
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorYes
NPI enumeratedJune 7, 2022
Last updated in NPPESJuly 30, 2025
Certification dateJuly 30, 2025
Mailing address1219 Torrey Pines Ct, Naperville, IL 60540-1400

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 2022 (4 years in practice)
Group practice Mount Sinai Community Foundation — 246 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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