Ammar Hassan, DO - Medicare Gastroenterology in Munster, IN

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Ammar Hassan, DO is a medicare enrolled "Internal Medicine - Gastroenterology" physician in Munster, Indiana. He went to Midwestern University, Chicago College Of Osteopathic Med and graduated in 2014 and has 12 years of diverse experience with area of expertise as Gastroenterology. He is a member of the group practice Prime Healthcare Illinois Medical Group Llc, Dalal Medical Corporation and his current practice location is 9410 Calumet Ave Ste 401, Munster, Indiana. You can reach out to his office (for appointments etc.) via phone at (219) 922-4900.

Ammar Hassan is licensed to practice in Indiana (license number 2005989A) and he also participates in the medicare program. He accepts medicare assignments (which means he accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and his NPI Number is 1023428877.

Contact Information

Ammar Hassan, DO
9410 Calumet Ave Ste 401,
Munster, IN 46321-0018
(219) 922-4900
(219) 836-9922

Map and Direction




Physician's Profile

Full NameAmmar Hassan
GenderMale
SpecialityGastroenterology
Experience12 Years
Location9410 Calumet Ave Ste 401, Munster, Indiana
Accepts Medicare AssignmentsYes. He accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Ammar Hassan attended and graduated from Midwestern University, Chicago College Of Osteopathic Med in 2014
  NPI Data:
  • NPI Number: 1023428877
  • Provider Enumeration Date: 05/02/2014
  • Last Update Date: 12/15/2025
  Medicare PECOS Information:
  • PECOS PAC ID: 1951607506
  • Enrollment ID: I20260120002065

Medical Identifiers

Medical identifiers for Ammar Hassan such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1023428877NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine 02005989A (Indiana)Secondary
207R00000XInternal Medicine 036153911 (Illinois)Secondary
207RG0100XInternal Medicine - Gastroenterology 2005989A (Indiana)Primary
207RG0100XInternal Medicine - Gastroenterology 036153911 (Illinois)Secondary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Franciscan Health MunsterMunster, INHospital
Methodist Hospitals IncGary, INHospital
Franciscan Health DyerDyer, INHospital
Saint Joseph Medical CenterJoliet, ILHospital
Mercy Medical CenterAurora, ILHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Prime Healthcare Illinois Medical Group Llc5597275685278
Dalal Medical Corporation85271285039

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. Ammar Hassan allows following entities to bill medicare on his behalf.
Entity NamePrime Healthcare Illinois Medical Group LLC
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1023837689
PECOS PAC ID: 5597275685
Enrollment ID: O20250609000646

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Ammar Hassan is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Ammar Hassan, DO
9410 Calumet Ave Ste 401,
Munster, IN 46321-0018

Ph: (219) 922-4900		Ammar Hassan, DO
9410 Calumet Ave Ste 401,
Munster, IN 46321-0018

Ph: (219) 922-4900

Reviews and Comments


Internal Medicine Doctors in Munster, IN

Maali Milhem, MD
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 9126 Columbia Ave, Munster, IN 46321
Phone: 219-703-2408    Fax: 219-703-6684
Sahar Halabi, M.D
Gastroenterology
Medicare: Medicare Enrolled
Practice Location: 761 45th St Ste 108, Munster, IN 46321
Phone: 219-922-5416    Fax: 219-922-3745
Wassim Shwaiki, M.D.
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 8840 Calumet Ave Ste 203, Munster, IN 46321
Phone: 219-836-7723    Fax: 219-836-7726
Thottathil Viswanathan Gopan, MD
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 761 45th St Ste 110, Munster, IN 46321
Phone: 219-922-3020    Fax: 219-922-3023
Dr. Kyle Kleist, D.O.
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 701 Superior Ave, Munster, IN 46321
Phone: 219-852-1524    Fax: 219-933-2288
Dr. Gene Lee Chang, M.D.
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 9030 Columbia Ave, Munster, IN 46321
Phone: 219-836-6002    Fax: 219-836-6003
Sana Shoaib Meah, D.O
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 761 45th Avenue, Suite 110, Munster, IN 46321
Phone: 219-922-3020    Fax: 219-922-3023

Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.