William C Chapman Jr., MD

Primary specialty

Colon & Rectal Surgery PhysicianTaxonomy code 208C00000X

License

2017007784 Issued in MO

Practice address

1044 N Mason Rd
Div Surg Colon/Rectal, Ste 310
Saint Louis, MO 63141-6431

Phone

(314) 454-7177

Fax

(888) 425-7946

NPI assigned

Jun 15, 2015

Sex

Male

Sole proprietor

No

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

Specialties & licenses 2

Addresses

Other identifiers 1

Electronic endpoints 1

Medicare fee-for-service enrollment

Enrolled in MO

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

Colorectal Surgery (Proctology)

Education

Georgetown University School of Medicine, 2015

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

Washington UniversityGroup PAC ID 9830008770, 2,968 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Barnes Jewish Hospital Hospital, Saint Louis, MO, CCN 260032
• Barnes-Jewish West County Hospital Hospital, Creve Coeur, MO, CCN 260162
• Missouri Baptist Medical Center Hospital, Saint Louis, MO, CCN 260108

Merit-based Incentive Payment System (MIPS)

Final score

84.2 of 100Reported as group

Quality

71.6

Promoting interoperability

100

Improvement activities

40

Cost

75.75

Procedures performed for Medicare patients

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Networks

• devoted network organization-734447cc-691b-4aa7-a112-9c9c8698dcc9
• devoted network organization-27eb9117-6975-449a-a7ad-909243995ddc
• devoted network organization-2b183dd2-4e80-4977-80a6-4fdf0df4361d
• IA HMO C-SNP
• IA HMO
• IL PPO Downstate

Interoperability endpoints

• FHIR API: https://epicproxy.et0965.epichosted.com/FHIRProxy/api/FHIR/DSTU2/
• Direct secure messaging: wchapman158794@direct.carenet.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.

• Washington University

  • Multi-Specialty Clinic/Center
  • Saint Louis, MO
  • NPI 1134169568
  Medicare reassignment Care Compare group NPD
• Washington University

  • Multi-Specialty Clinic/Center
  • Saint Louis, MO
  • NPI 1962442475
  NPD
• Barnes Jewish Hospital

  • General Acute Care Hospital
  • Saint Louis, MO
  • NPI 1649299827
  NPD (past)

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

• Barnes Jewish Hospital

  • General Acute Care Hospital
  • Saint Louis, MO
  • NPI 1649299827
  Care Compare affiliation
• Barnes Jewish West County Hospital

  • General Acute Care Hospital
  • Saint Louis, MO
  • NPI 1831107895
  Care Compare affiliation
• Missouri Baptist Medical Center

  • General Acute Care Hospital
  • Saint Louis, MO
  • NPI 1487663506
  Care Compare affiliation

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

{
    "created_epoch": "1434326400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1744675200000",
    "number": "1003297177",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 7412011",
            "city": "CHICAGO",
            "state": "IL",
            "postal_code": "606742011",
            "telephone_number": "314-454-7177",
            "fax_number": "888-425-7946"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1044 N MASON RD",
            "address_2": "DIV SURG COLON/RECTAL, STE 310",
            "city": "SAINT LOUIS",
            "state": "MO",
            "postal_code": "631416431",
            "telephone_number": "314-454-7177",
            "fax_number": "888-425-7946"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "CHAPMAN",
        "first_name": "WILLIAM",
        "middle_name": "C",
        "name_prefix": "Dr.",
        "name_suffix": "Jr.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2015-06-15",
        "last_updated": "2025-04-15",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "208600000X",
            "taxonomy_group": "",
            "desc": "Surgery",
            "state": "MO",
            "license": "2017007784",
            "primary": false
        },
        {
            "code": "208C00000X",
            "taxonomy_group": "",
            "desc": "Colon & Rectal Surgery",
            "state": "MO",
            "license": "2017007784",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "200044671",
            "state": "MO"
        }
    ],
    "endpoints": [
        {
            "endpointType": "FHIR",
            "endpointTypeDescription": "FHIR URL",
            "endpoint": "https://epicproxy.et0965.epichosted.com/FHIRProxy/api/FHIR/DSTU2/",
            "affiliation": "Y",
            "affiliationName": "Washington University",
            "address_1": "1044 N Mason Rd",
            "address_2": "Div Surg Colon/Rectal, Ste 310",
            "city": "Saint Louis",
            "state": "MO",
            "country_code": "US",
            "postal_code": "631416431",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Matthew Brandon Chapman, MD
• Morgan Chapman
• Nickie Chapman
• Roxanne Chapman
• Taylor Chapman, PT
• William Cavanaugh Chapman, MD
• Dana Chapnick
• Melissa Chapnick, RD, MS, MPH
• Joel Chappeau, MAC, LPC
• Christopher Lee Chappell, DO

• Colon & Rectal Surgery Physician in Saint Louis, MO
• Providers in Saint Louis, MO by specialty
• Colon & Rectal Surgery Physician in Missouri

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