Thomas Barker, MD

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

4301517962 Issued in MI

Practice address

2900 Collins Rd
Lansing, MI 48910-8394

Phone

(517) 975-6000

NPI assigned

Jun 1, 2023

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 MI

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

Michigan State University College of Human Medicine, 2023

Medicare assignment

May accept Medicare assignment

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

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

{
    "created_epoch": "1685577600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1782086400000",
    "number": "1497448773",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "3955 PATIENT CARE DR STE A",
            "city": "LANSING",
            "state": "MI",
            "postal_code": "489114271",
            "telephone_number": "517-374-7600",
            "fax_number": "885-480-9150"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2900 COLLINS RD",
            "city": "LANSING",
            "state": "MI",
            "postal_code": "489108394",
            "telephone_number": "517-975-6000"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "3955 Patient Care Dr Ste A",
            "address_purpose": "LOCATION",
            "city": "Lansing",
            "state": "MI",
            "postal_code": "489114271",
            "country_code": "US",
            "telephone_number": "517-374-7600",
            "fax_number": "885-480-9150",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "BARKER",
        "first_name": "THOMAS",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2023-06-01",
        "last_updated": "2026-06-22",
        "certification_date": "2026-06-22",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "MI",
            "license": "4301517962",
            "primary": true
        },
        {
            "code": "390200000X",
            "taxonomy_group": "",
            "desc": "Student in an Organized Health Care Education/Training Program",
            "state": "MI",
            "license": "4351051047",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Danielle Barber, PA
• Ericka K Barber, LMSW
• Makenzie Barber, PA-C
• Dominic V Barberio, DO
• Sarah Mercke Barden, PHARM.D.
• Nala Barlow
• Brendan Barnes
• Joseph Barnes, CRNA
• Karen Double Barnes, OTR
• Spencer P Barnes, D.D.S.

• All providers in Lansing, MI
• Internal Medicine Physician in Michigan

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 22, 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.