Zain Bin Ahsan, DO
Internal Medicine Physician · Chicago, IL
Zain Bin Ahsan, DO is an internal medicine physician with a practice address in Chicago, Illinois, and NPI 1740919588, issued on Jun 7, 2022. Check the license (Illinois 036176169, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Zain Bin Ahsan
- Credential
- DO
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 036176169 IL
R3747 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 1500 S Fairfield Ave, Chicago, IL 60608
- Phone
- (773) 542-2000
- Enumerated
- Jun 7, 2022
- Record last updated
- Jul 30, 2025
- Medicare enrollment
- Enrolled (PECOS I20250808003806); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,238 in Illinois → Look up another NPI →
Also registered at 1500 S Fairfield Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mohemmed AbbasFamily Medicine Physician1609612522
- Ka'Tee Abercrombie, FNP-CFamily Nurse Practitioner1023475894
- Halder Abozait, MDInternal Medicine Physician1114844040
- Olga Abreu LopezFamily Medicine Physician1891525267
- Eliz Achhami, MDInternal Medicine Physician1194613919
- Candace Acuff, MD, MPHSurgical Critical Care Physician1235845025
Verify Zain Bin Ahsan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 036176169Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average internal medicine physician in 2024
68 Medicare Part D claims for 36 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Mount Sinai Community FoundationChicago, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Zain Bin Ahsan among 7,238 internal medicine physician records in Illinois
Zain Bin Ahsan, DO is one of 7,238 internal medicine physician records with a practice address in Illinois. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2022, is newer than 78% of them.
- NPI issued2022 · 78% of these records are older, 18% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated2022 · median 2003 among the 3,580 with a school on file
- Record last updated2025 · 47% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
2,867 internal medicine physician records list a practice address in Chicago
They are 2,867 of the 63,379 NPPES records with a practice address in Chicago, and 7,238 internal medicine physician records in Illinois.
All 7,238 in Illinois → Every provider in Chicago → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Edgar Asebey, M.D.Chicago, IL 606081255359097
- Mohammad Jamil, MDChicago, IL 606081174635940
- Mohammed Kassem, M.DChicago, IL 606081023053808
- Gary Kaufman, M.D.Chicago, IL 606081447252457
- Mohammad Khamis, M.D.Chicago, IL 606081881687390
- Girija Kumar, M.D.Chicago, IL 606081861486250
- Jairo Mejia, M.D.Chicago, IL 606081952361164
- Raymond Narh, M.DChicago, IL 606081205846300
Common questions
What is Zain Bin Ahsan, DO's NPI number?
Zain Bin Ahsan, DO's National Provider Identifier (NPI) is 1740919588, issued on Jun 7, 2022. An NPI identifies a provider in billing; it is not a license.
Where is Zain Bin Ahsan, DO located?
The NPPES record lists a practice address at 1500 S Fairfield Ave, Chicago, IL, 60608. Phone: (773) 542-2000. Providers update this record themselves, so call before visiting.
How can I verify Zain Bin Ahsan, DO's license?
NPPES lists Illinois license number 036176169, as entered by the provider. Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Zain Bin Ahsan, DO prescribe under Medicare Part D?
In 2024, Zain Bin Ahsan, DO had 68 Medicare Part D claims for 36 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.