Marshall K. Walker, M.D.

Primary specialty

Vascular & Interventional Radiology PhysicianTaxonomy code 2085R0204X

License

MD.31143 Issued in AL

Practice address

3610 Springhill Memorial Dr. N.
Mobile, AL 36608-1162

Phone

(251) 410-3600

Fax

(251) 410-3743

NPI assigned

May 4, 2010

Sex

Male

Sole proprietor

Yes

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

Specialties & licenses 8

Addresses

Other names 1

• Mr. Marshall Kingman Walker Sr. Other name

Medicare fee-for-service enrollment

Enrolled in AL, MS, MT, NC, FL5 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 5

Specialty

Diagnostic Radiology

Education

Tulane University School of Medicine, 2010

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Radiology Imaging Specialists LLCGroup PAC ID 0244529030, 17 clinicians

Mobile Open MRI LLCGroup PAC ID 8628098845, 3 clinicians

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations (25 of 31)

Networks

• Optimum HealthCare HMO Network

Interoperability endpoints

• FHIR API: https://api.platform.athenahealth.com/10998/brand/1/csg/1/fhir/r4

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.

• Radiology Imaging Specialists LLC

  • Diagnostic Radiology Physician
  • Ocala, FL
  • NPI 1952763971
  Medicare reassignment Care Compare group NPD
• Mobile Open MRI LLC

  • Diagnostic Radiology Physician
  • Mobile, AL
  • NPI 1548228323
  Medicare reassignment Care Compare group
• Advanced Imaging of Alabama LLC

  • Diagnostic Radiology Physician
  • Anniston, AL
  • NPI 1629221510
  Medicare reassignment NPD
• Advanced Imaging of Gadsden LLC

  • Diagnostic Radiology Physician
  • Gadsden, AL
  • NPI 1972615581
  Medicare reassignment NPD
• American Family Care, LLC

  • Primary Care Clinic/Center
  • Birmingham, AL
  • NPI 1669429080
  Medicare reassignment NPD
• Prime Healthcare Services-Gadsden Physician Management LLC

  • Family Medicine Physician
  • Gadsden, AL
  • NPI 1356731467
  Medicare reassignment NPD
• Selma Radiology Associates P C

  • Specialist
  • Montgomery, AL
  • NPI 1669429296
  Medicare reassignment NPD
• Seton Medical Management Inc.

  • Radiation Oncology Physician
  • Mobile, AL
  • NPI 1841629946
  Medicare reassignment NPD
• The Orthopaedic Group, PC

  • Specialist
  • Mobile, AL
  • NPI 1164489951
  Medicare reassignment NPD
• University of South Alabama

  • Family Medicine Physician
  • Mobile, AL
  • NPI 1992746838
  Medicare reassignment NPD
• USA Health Physician Billing Services LLC

  • Internal Medicine Physician
  • Mobile, AL
  • NPI 1720645468

  Diagnostic Radiology

  Medicare reassignment NPD
• USA Health Physician Billing Services LLC

  • Radiation Oncology Physician
  • Mobile, AL
  • NPI 1871150508

  Diagnostic Radiology

  Medicare reassignment NPD

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

{
    "created_epoch": "1272931200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1763683200000",
    "number": "1619295441",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "3610 SPRINGHILL MEMORIAL DR N",
            "city": "MOBILE",
            "state": "AL",
            "postal_code": "366081162",
            "telephone_number": "251-410-3600",
            "fax_number": "251-410-3700"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "3610 SPRINGHILL MEMORIAL DR. N.",
            "city": "MOBILE",
            "state": "AL",
            "postal_code": "366081162",
            "telephone_number": "251-410-3600",
            "fax_number": "251-410-3743"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "4250 Hospital Dr",
            "address_purpose": "LOCATION",
            "city": "Marianna",
            "state": "FL",
            "postal_code": "324461917",
            "country_code": "US",
            "telephone_number": "850-526-2200",
            "fax_number": "850-718-2844",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "WALKER",
        "first_name": "MARSHALL",
        "middle_name": "K.",
        "name_prefix": "Mr.",
        "credential": "M.D.",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2010-05-04",
        "last_updated": "2025-11-21",
        "certification_date": "2025-11-21",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2085R0202X",
            "taxonomy_group": "",
            "desc": "Radiology, Diagnostic Radiology",
            "state": "KY",
            "license": "C3071",
            "primary": false
        },
        {
            "code": "2085R0202X",
            "taxonomy_group": "",
            "desc": "Radiology, Diagnostic Radiology",
            "state": "MS",
            "license": "24945",
            "primary": false
        },
        {
            "code": "2085R0204X",
            "taxonomy_group": "",
            "desc": "Radiology, Vascular & Interventional Radiology",
            "state": "FL",
            "license": "ME170526",
            "primary": false
        },
        {
            "code": "2085R0204X",
            "taxonomy_group": "",
            "desc": "Radiology, Vascular & Interventional Radiology",
            "state": "AL",
            "license": "31143",
            "primary": false
        },
        {
            "code": "390200000X",
            "taxonomy_group": "",
            "desc": "Student in an Organized Health Care Education/Training Program",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "2085R0204X",
            "taxonomy_group": "",
            "desc": "Radiology, Vascular & Interventional Radiology",
            "state": "AL",
            "license": "MD.31143",
            "primary": true
        },
        {
            "code": "2085R0204X",
            "taxonomy_group": "",
            "desc": "Radiology, Vascular & Interventional Radiology",
            "state": "MS",
            "license": "24945",
            "primary": false
        },
        {
            "code": "2085R0204X",
            "taxonomy_group": "",
            "desc": "Radiology, Vascular & Interventional Radiology",
            "state": "KY",
            "license": "C3071",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "first_name": "MARSHALL",
            "last_name": "WALKER",
            "middle_name": "KINGMAN",
            "prefix": "MR.",
            "suffix": "SR.",
            "credential": "M.D.",
            "code": "5",
            "type": "Other Name"
        }
    ]
}

• James L. Walker, M.D.
• Karen Denise Walker, OTR/L
• Kathy E. Walker, NP
• Kimberly Ann Walker, PHARMD
• Kira Stojcich Walker, PHARMD
• Morgan Walker
• Nikki Halla Devenny Walker, M.S., CCC-SLP
• Rachel Walker, PHARM.D
• Scott Evan Walker, D.C.
• Teresa G. Walker, M.D.

• Vascular & Interventional Radiology Physician in Mobile, AL
• Providers in Mobile, AL by specialty
• Vascular & Interventional Radiology Physician in Alabama

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Nov 21, 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.