Ammar Hassan, D.O.

Primary specialty

Gastroenterology PhysicianTaxonomy code 207RG0100X

License

2005989A Issued in IN

Practice address

9410 Calumet Ave Ste 401
Munster, IN 46321-0018

Phone

(219) 922-4900

Fax

(219) 836-9922

NPI assigned

May 2, 2014

Sex

Male

Sole proprietor

No

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

Specialties & licenses 4

Addresses

Electronic endpoints 1

Medicare fee-for-service enrollment

Enrolled in IN, IL2 enrollments

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 2

Specialty

GastroenterologyAlso: Internal Medicine

Education

Midwestern University, Chicago College of Osteopathic Med, 2014

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Prime Healthcare Illinois Medical Group LLCGroup PAC ID 5597275685, 278 clinicians

Dalal Medical CorporationGroup PAC ID 8527128503, 9 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Franciscan Health Munster Hospital, Munster, IN, CCN 150165
• Methodist Hospitals Inc Hospital, Gary, IN, CCN 150002
• Franciscan Health Dyer Hospital, Dyer, IN, CCN 150090
• Saint Joseph Medical Center Hospital, Joliet, IL, CCN 140007
• Presence Mercy Medical Center Hospital, Aurora, IL, CCN 140174

Merit-based Incentive Payment System (MIPS)

Final score

92.23 of 100Reported as group

Quality

84.45

Improvement activities

40

Merit-based Incentive Payment System (MIPS)

Final score

78.64 of 100Reported as group

Quality

56.64

Promoting interoperability

73

Improvement activities

40

Cost

76.72

Procedures performed for Medicare patients

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Osteopathy

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: ahassan119020@themethodisthospitals.direct-ci.com
• Direct secure messaging: cdh-nwi@directaddress.net
• Direct secure messaging: ahassan105144@direct.franciscanalliance.org

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

• Dalal Medical Corporation

  • Gastroenterology Physician
  • Munster, IN
  • NPI 1720024615
  Medicare reassignment Care Compare group NPD
• Prime Healthcare Illinois Medical Group LLC

  • Multi-Specialty Clinic/Center
  • Des Plaines, IL
  • NPI 1023837689

  Internal Medicine

  Medicare reassignment Care Compare group NPD
• The Methodist Hospitals, Inc

  • Internal Medicine Physician
  • Gary, IN
  • NPI 1720290349
  Medicare reassignment NPD
• The Methodist Hospitals, Inc

  • Gastroenterology Physician
  • Gary, IN
  • NPI 1326614991
  NPD
• The Methodist Hospitals, Inc

  • Neurology Physician
  • Gary, IN
  • NPI 1720290588
  NPD

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

• Franciscan Health Dyer & Hammond

  • General Acute Care Hospital
  • Dyer, IN
  • NPI 1811077431
  Care Compare affiliation
• Franciscan Health Munster

  • General Acute Care Hospital
  • Munster, IN
  • NPI 1427493246
  Care Compare affiliation
• The Methodist Hospitals, Inc

  • General Acute Care Hospital
  • Gary, IN
  • NPI 1467504555
  Care Compare affiliation
• Mercy Medical Center - Aurora LLC

  • General Acute Care Hospital
  • Aurora, IL
  • NPI 1598503922
  Care Compare affiliation
• Saint Joseph Medical Center - Joliet LLC

  • General Acute Care Hospital
  • Joliet, IL
  • NPI 1760220198
  Care Compare affiliation

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

{
    "created_epoch": "1398988800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1765756800000",
    "number": "1023428877",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "9410 CALUMET AVE STE 401",
            "city": "MUNSTER",
            "state": "IN",
            "postal_code": "463210018",
            "telephone_number": "219-922-4900",
            "fax_number": "219-836-9922"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "9410 CALUMET AVE STE 401",
            "city": "MUNSTER",
            "state": "IN",
            "postal_code": "463210018",
            "telephone_number": "219-922-4900",
            "fax_number": "219-836-9922"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "500 S Weber Rd",
            "address_purpose": "LOCATION",
            "city": "Romeoville",
            "state": "IL",
            "postal_code": "604466528",
            "country_code": "US",
            "telephone_number": "815-773-7732",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "HASSAN",
        "first_name": "AMMAR",
        "credential": "D.O.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2014-05-02",
        "last_updated": "2025-12-15",
        "certification_date": "2025-12-15",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "IN",
            "license": "02005989A",
            "primary": false
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "IL",
            "license": "036153911",
            "primary": false
        },
        {
            "code": "207RG0100X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Gastroenterology",
            "state": "IN",
            "license": "2005989A",
            "primary": true
        },
        {
            "code": "207RG0100X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Gastroenterology",
            "state": "IL",
            "license": "036153911",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "cdh-nwi@directaddress.net",
            "affiliation": "N",
            "endpointDescription": "CDH Ggastro",
            "use": "DIRECT",
            "useDescription": "Direct",
            "contentType": "CSV",
            "contentTypeDescription": "CSV",
            "address_1": "9410 Calumet Ave Ste 401",
            "city": "Munster",
            "state": "IN",
            "country_code": "US",
            "postal_code": "463210018",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Abbe Lynne Harpp, ATC, LAT
• Kyle Harrington, PA-C
• David John Harris, M.D.
• Dominic Harris, MD
• Siddiq S Hasan, MD
• Nicole Elizabeth Hawkins, FNP
• Jennifer Hayes, PT
• Hannah Hazlewood, PA-C
• Michael Travis Hazy, LMHC
• Health for the Soul LLC

• Gastroenterology Physician in Munster, IN
• Providers in Munster, IN by specialty
• Gastroenterology Physician in Indiana

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Dec 15, 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.