Kathleen Walker Mayer, MD

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

C176095 Issued in CA

Practice address

4900 California Ave FL 2
Bakersfield, CA 93309-7024

Phone

(617) 505-1520

Fax

(617) 928-8401

NPI assigned

Feb 27, 2007

Last updated

Jun 11, 2026By the provider in NPPES

Sex

Female

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 TX, MN, OH, NC, TN, CA, IL7 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 7

Specialty

Internal Medicine

Education

University of Colorado School of Medicine, Aurora, 1997

Medicare assignment

May accept Medicare assignment

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

• Cirrusmd Medical Group of Delaware, P.a.

  • Family Medicine Physician
  • Denver, CO
  • NPI 1922664200

  CA, MN, OH

  Medicare reassignment NPD
• Cmdpn Medical Group of Washington P C

  • Family Medicine Physician
  • Spokane, WA
  • NPI 1316422454

  NC, TN

  Medicare reassignment NPD
• Cmdpn Medical Group of Texas, P.a.

  • Family Medicine Physician
  • Dallas, TX
  • NPI 1174082150
  Medicare reassignment
• Form Health Associates Ma, P.C.

  • Endocrinology, Diabetes & Metabolism Physician
  • Boston, MA
  • NPI 1386260594

  IL

  Medicare reassignment
• Iora Health Massachusetts, P.C.

  dba One Medical

  • Internal Medicine Physician
  • Hyannis, MA
  • NPI 1851858666
  NPD (past)
• Iora Health, LLC

  dba One Medical at Dartmouth

  • Internal Medicine Physician
  • Hanover, NH
  • NPI 1700285616
  NPD (past)

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

{
    "created_epoch": "1172534400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1781136000000",
    "number": "1457488439",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "109 S STATE ST STE 5",
            "city": "CHICAGO",
            "state": "IL",
            "postal_code": "606035606",
            "telephone_number": "617-505-1520",
            "fax_number": "617-928-8401"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "4900 CALIFORNIA AVE FL 2",
            "city": "BAKERSFIELD",
            "state": "CA",
            "postal_code": "933097024",
            "telephone_number": "617-505-1520",
            "fax_number": "617-928-8401"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "MAYER",
        "first_name": "KATHLEEN",
        "middle_name": "WALKER",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2007-02-27",
        "last_updated": "2026-06-11",
        "certification_date": "2026-06-11",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "CO",
            "license": "37902",
            "primary": false
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "CA",
            "license": "C176095",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Beauty Lu May
• Kamala Unique May, LVN
• Stephanie May
• Destiny Maya
• Tani Mayeda
• Ashley Mayorga
• Mayowa Olugbami (Pine Medical Transportation)
• Kristin Maytubby, PSY.D., LCSW
• Nichol Arline Maytubby, DPT
• Summer Rae Mazantini

• Internal Medicine Physician in Bakersfield, CA
• Providers in Bakersfield, CA by specialty
• Internal Medicine Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 11, 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.