Christopher Grant Chapman, M.D.

Primary specialty

Gastroenterology PhysicianTaxonomy code 207RG0100X

License

036128100 Issued in IL

Practice address

1520 W Harrison St
Chicago, IL 60607-3106

Phone

(312) 942-8651

NPI assigned

Feb 18, 2009

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

Medicare fee-for-service enrollment

Enrolled in IL, OH, IN3 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 3

Specialty

GastroenterologyAlso: Internal Medicine

Education

Johns Hopkins University School of Medicine, 2008

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

Rush University Medical GroupGroup PAC ID 5496658874, 1,521 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Rush University Medical Center Hospital, Chicago, IL, CCN 140119
• Rush Oak Park Hospital Hospital, Oak Park, IL, CCN 140063

Procedures performed for Medicare patients

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: cchapmanmd18235@uchospital.direct-ci.com

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.

• Rush University Medical Group

  dba Rush University Internists

  • Internal Medicine Physician
  • Chicago, IL
  • NPI 1093819542

  IN

  Medicare reassignment Care Compare group NPD
• Carle Health Care Incorporated

  dba Carle Physician Group

  • Internal Medicine Physician
  • Urbana, IL
  • NPI 1154653947

  Gastroenterology

  Medicare reassignment NPD
• Freeport Regional Health Care Foundation

  dba FHN

  • Family Medicine Physician
  • Freeport, IL
  • NPI 1457337016
  Medicare reassignment NPD
• The University of Chicago Medical Center

  • General Acute Care Hospital
  • Chicago, IL
  • NPI 1033218128
  Medicare reassignment NPD
• Trihealth H LLC

  • Obstetrics Physician
  • Cincinnati, OH
  • NPI 1811215742

  Gastroenterology

  Medicare reassignment NPD
• The University of Chicago Medical Center

  dba UCMC Pharmacy Services

  • Community/Retail Pharmacy
  • Calumet City, IL
  • NPI 1255895678
  NPD

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

• Rush Oak Park Hospital Inc

  • General Acute Care Hospital
  • Oak Park, IL
  • NPI 1558391706
  Care Compare affiliation
• Rush University Medical Center

  • Children's Hospital
  • Chicago, IL
  • NPI 1801908728
  Care Compare affiliation
• Rush University Medical Center

  • General Acute Care Hospital
  • Chicago, IL
  • NPI 1932213600
  Care Compare affiliation

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

{
    "created_epoch": "1234915200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1780358400000",
    "number": "1235378043",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1725 W HARRISON ST STE 206",
            "city": "CHICAGO",
            "state": "IL",
            "postal_code": "606123988",
            "telephone_number": "312-942-8651"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1520 W HARRISON ST",
            "city": "CHICAGO",
            "state": "IL",
            "postal_code": "606073106",
            "telephone_number": "312-942-8651"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "CHAPMAN",
        "first_name": "CHRISTOPHER",
        "middle_name": "GRANT",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2009-02-18",
        "last_updated": "2026-06-02",
        "certification_date": "2026-06-02",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RG0100X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Gastroenterology",
            "state": "OH",
            "license": "35.146804",
            "primary": false
        },
        {
            "code": "207RG0100X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Gastroenterology",
            "state": "IL",
            "license": "036128100",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Patricia Chapman-Kelly, APN
• Alexa A Chapman, NP
• Allison Jane Chapman, APRN, CNP
• Arlene Chapman
• Brenna Rose Chapman
• Courtney Brooke Chapman, MA, CCC-SLP
• Dina L Chapman, OT
• Johne Philip Chapman, MD
• Jonathan Chapman, LCSW
• Joseph Chapman

• Gastroenterology Physician in Chicago, IL
• Providers in Chicago, IL by specialty
• Gastroenterology Physician in Illinois

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 2, 2026; 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.