Dr Michael John Weaver, MD - Medicare Gastroenterology in Saint Louis, MO

Dr Michael John Weaver, MD is a medicare enrolled "Internal Medicine - Gastroenterology" physician in Saint Louis, Missouri. He went to Loyola University Of Chicago, Stritch School Of Medicine and graduated in 2013 and has 11 years of diverse experience with area of expertise as Gastroenterology. He is a member of the group practice Granite Peaks Gi, Llc and his current practice location is 4901 Forest Park Ave, Ste 2, Saint Louis, Missouri. You can reach out to his office (for appointments etc.) via phone at (314) 362-5060.

Dr Michael John Weaver is licensed to practice in Utah (license number 12137545-1205) 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 1720427974.

Contact Information

Dr Michael John Weaver, MD
4901 Forest Park Ave, Ste 2,
Saint Louis, MO 63108-1402
(314) 362-5060
(314) 362-6959

Map and Direction




Physician's Profile

Full NameDr Michael John Weaver
GenderMale
SpecialityGastroenterology
Experience11 Years
Location4901 Forest Park Ave, Saint Louis, Missouri
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:
  • Dr Michael John Weaver attended and graduated from Loyola University Of Chicago, Stritch School Of Medicine in 2013
  NPI Data:
  • NPI Number: 1720427974
  • Provider Enumeration Date: 06/20/2013
  • Last Update Date: 05/17/2021
  Medicare PECOS Information:
  • PECOS PAC ID: 5395966816
  • Enrollment ID: I20210616002532

Medical Identifiers

Medical identifiers for Dr Michael John Weaver such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1720427974NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
208D00000XGeneral Practice 2015013524 (Missouri)Secondary
207RG0100XInternal Medicine - Gastroenterology 12137545-1205 (Utah)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Alta View HospitalSandy, UTHospital
Lone Peak HospitalDraper, UTHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Granite Peaks Gi, Llc539592011012

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. Dr Michael John Weaver allows following entities to bill medicare on his behalf.
Entity NameGranite Peaks Gi, Llc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1689872897
PECOS PAC ID: 5395920110
Enrollment ID: O20110420000821

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. Dr Michael John Weaver 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
Dr Michael John Weaver, MD
660 S Euclid Ave, C B 8121,
Saint Louis, MO 63110-1010

Ph: (314) 362-5060
Dr Michael John Weaver, MD
4901 Forest Park Ave, Ste 2,
Saint Louis, MO 63108-1402

Ph: (314) 362-5060

Reviews and Comments


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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).

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