Zain Bin Ahsan, DO

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

036176169 Issued in IL

Practice address

1500 S Fairfield Ave
Chicago, IL 60608-1782

Phone

(773) 542-2000

NPI assigned

Jun 7, 2022

Last updated

Jul 30, 2025By the provider in NPPES

Sex

Male

Sole proprietor

Yes

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 2

Addresses

Medicare fee-for-service enrollment

Enrolled in IL

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 1

Specialty

Internal Medicine

Education

Other, 2022

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Mount Sinai Community FoundationGroup PAC ID 5991600405, 247 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Mt Sinai Hospital Medical Center Hospital, Chicago, IL, CCN 140018
• Holy Cross Hospital Hospital, Chicago, IL, CCN 140133

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Osteopathy

State licenses

Practice roles

Locations

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

• Mount Sinai Community Foundation

  dba Sinai Medical Group

  • Rehabilitation Hospital
  • Chicago, IL
  • NPI 1376715896
  Medicare reassignment Care Compare group NPD
• Mount Sinai Community Foundation

  dba Sinai Medical Group

  • General Acute Care Hospital
  • Chicago, IL
  • NPI 1982657854

  Internal Medicine

  NPD
• Mount Sinai Community Foundation Dba Sinai Medical Group

  • Multi-Specialty Clinic/Center
  • Chicago, IL
  • NPI 1023451119
  NPD

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

• Holy Cross Hospital

  • Psychiatric Hospital Unit
  • Chicago, IL
  • NPI 1427547538
  Care Compare affiliation
• Holy Cross Hospital

  • Substance Abuse Rehabilitation Facility
  • Chicago, IL
  • NPI 1770335770

  Hospital

  Care Compare affiliation
• Holy Cross Hospital

  • Substance Abuse Rehabilitation Facility
  • Chicago, IL
  • NPI 1821840828

  Hospital

  Care Compare affiliation
• Holy Cross Hospital

  • General Acute Care Hospital
  • Chicago, IL
  • NPI 1962425611
  Care Compare affiliation
• Mount Sinai Hospital Medical Center

  • General Acute Care Hospital
  • Chicago, IL
  • NPI 1871581314
  Care Compare affiliation

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1654560000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1753833600000",
    "number": "1740919588",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1219 TORREY PINES CT",
            "city": "NAPERVILLE",
            "state": "IL",
            "postal_code": "605401400",
            "telephone_number": "630-386-7186"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1500 S FAIRFIELD AVE",
            "city": "CHICAGO",
            "state": "IL",
            "postal_code": "606081782",
            "telephone_number": "773-542-2000"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "5700 AZ-90",
            "address_purpose": "LOCATION",
            "city": "Sierra Vista",
            "state": "AZ",
            "postal_code": "85635",
            "country_code": "US",
            "telephone_number": "520-263-2000",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "AHSAN",
        "first_name": "ZAIN",
        "middle_name": "BIN",
        "credential": "DO",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2022-06-07",
        "last_updated": "2025-07-30",
        "certification_date": "2025-07-30",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "AZ",
            "license": "R3747",
            "primary": false
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "IL",
            "license": "036176169",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Travis J Ahrens, D.C.
• William R. Ahrens
• Kiran Ahsan
• Mohammed Ahsan X
• Muhammad Ahsan, D.O.
• Arjun Ahuja, MD
• Ahuja, Chethik, & Associates
• Harmeen Ahuja, PH.D.
• Richard M Ahuja, MD
• Satya Ahuja, M.D.

• Internal Medicine Physician in Chicago, IL
• Providers in Chicago, IL by specialty
• Internal Medicine Physician in Illinois

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 30, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.