Dr William C Chapman Jr, MD - Medicare Colon & Rectal Surgery in Saint Louis, MO

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Dr William C Chapman Jr, MD is a medicare enrolled "Colon & Rectal Surgery" physician in Saint Louis, Missouri. His current practice location is 1044 N Mason Rd, Div Surg Colon/rectal, Ste 310, Saint Louis, Missouri. You can reach out to his office (for appointments etc.) via phone at (314) 454-7177.

Dr William C Chapman Jr is licensed to practice in Missouri (license number 2017007784) and he also participates in the medicare program. He does not accept medicare assignments directly but he may accept medicare through third-party (refer to Reassignment section below) and may also prescribe medicare part D drugs. His NPI Number is 1003297177.

Contact Information

Dr William C Chapman Jr, MD
1044 N Mason Rd, Div Surg Colon/rectal, Ste 310,
Saint Louis, MO 63141-6431
(314) 454-7177
(888) 425-7946

Map and Direction




Physician's Profile

Full NameDr William C Chapman Jr
GenderMale
SpecialityColon & Rectal Surgery
Location1044 N Mason Rd, Saint Louis, Missouri
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1003297177
  • Provider Enumeration Date: 06/15/2015
  • Last Update Date: 04/25/2024
  Medicare PECOS Information:
  • PECOS PAC ID: 3274847876
  • Enrollment ID: I20230606000999

Medical Identifiers

Medical identifiers for Dr William C Chapman Jr such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1003297177NPI-NPPES
200044671MedicaidMO

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
208600000XSurgery 2017007784 (Missouri)Secondary
208C00000XColon & Rectal Surgery 2017007784 (Missouri)Primary

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 William C Chapman Jr allows following entities to bill medicare on his behalf.
Entity NameWashington University
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1134169568
PECOS PAC ID: 9830008770
Enrollment ID: O20040317000959

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 William C Chapman Jr 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 William C Chapman Jr, MD
Po Box 60352,
Saint Louis, MO 63160-0352

Ph: (314) 454-7177		Dr William C Chapman Jr, MD
1044 N Mason Rd, Div Surg Colon/rectal, Ste 310,
Saint Louis, MO 63141-6431

Ph: (314) 454-7177

Reviews and Comments



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.