James Whittenburg Walker Jr., MD

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

H9584 Issued in TX

Practice address

1400 S Coulter St
Amarillo, TX 79106-1786

Phone

(806) 414-9100

Fax

(806) 354-5717

NPI assigned

Dec 8, 2005

Sex

Male

Sole proprietor

No

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

Specialties & licenses 1

Addresses

Other identifiers 5

Medicare fee-for-service enrollment

Enrolled in TX

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

Internal Medicine

Education

University of Texas Southwestern Medical School at Dallas, 1990

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Texas Tech University Health Sciences Center AmarilloGroup PAC ID 9234037847, 74 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Enhabit Hospice Hospice, Amarillo, TX, CCN 741634
• Northwest Texas Hospital Hospital, Amarillo, TX, CCN 450209
• Bsa Hospital Hospital, Amarillo, TX, CCN 450231

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: jameswalker@ttuhsc.allscriptsdirect.net

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.

• Texas Tech University Health Sciences Center Amarillo

  • Internal Medicine Physician
  • Amarillo, TX
  • NPI 1871525840
  Medicare reassignment Care Compare group NPD
• Texas Tech University Health Sciences Center

  • Pharmacy
  • Lubbock, TX
  • NPI 1609810977
  NPD
• Northwest Texas Healthcare System Inc

  • General Acute Care Hospital
  • Amarillo, TX
  • NPI 1467442418
  NPD (past)
• Texas Tech University Health Sciences Center El Paso

  • Internal Medicine Physician
  • El Paso, TX
  • NPI 1598705055
  NPD (past)

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

• Abba Home Health, LP

  • Community Based Hospice Care Agency
  • Amarillo, TX
  • NPI 1982097242
  Care Compare affiliation
• Bsa Hospital LLC

  • General Acute Care Hospital
  • Amarillo, TX
  • NPI 1407191984
  Care Compare affiliation
• Northwest Texas Healthcare System Inc

  • General Acute Care Hospital
  • Amarillo, TX
  • NPI 1467442418
  Care Compare affiliation

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

{
    "created_epoch": "1134000000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1748822400000",
    "number": "1144205568",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1400 WALLACE BLVD",
            "city": "AMARILLO",
            "state": "TX",
            "postal_code": "791061708",
            "telephone_number": "806-414-9100",
            "fax_number": "806-354-5717"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1400 S COULTER ST",
            "city": "AMARILLO",
            "state": "TX",
            "postal_code": "791061786",
            "telephone_number": "806-414-9100",
            "fax_number": "806-354-5717"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "WALKER",
        "first_name": "JAMES",
        "middle_name": "WHITTENBURG",
        "name_suffix": "Jr.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2005-12-08",
        "last_updated": "2025-06-02",
        "certification_date": "2025-06-02",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "TX",
            "license": "H9584",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "200347260 A",
            "state": "OK"
        },
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "P089K7726",
            "state": "TX"
        },
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "132290108",
            "state": "TX"
        },
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "132290109",
            "state": "TX"
        },
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "64971589",
            "state": "NM"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Shelly Lynn Walker-Adams, M.D.
• Allison Irene Walker, PHARM D
• Andrea Walker
• Augusta Walker
• Brock Walker, MD
• Juliana Walker
• Mary Caroline Walker, NP-C
• Rachel L Walker, DO
• Wayne Scott Walker
• William Trace Walker, D.M.D.

• Internal Medicine Physician in Amarillo, TX
• Providers in Amarillo, TX by specialty
• Internal Medicine Physician in Texas

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