Kristin M. Williams, M.D.

Primary specialty

Maternal & Fetal Medicine PhysicianTaxonomy code 207VM0101X

License

76897 Issued in AZ

Practice address

2620 N 3Rd St Ste 103
Phoenix, AZ 85004-1153

Phone

(480) 756-6000

NPI assigned

Feb 13, 2007

Sex

Female

Sole proprietor

No

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

Specialties & licenses 1

Addresses

Medicare fee-for-service enrollment

Enrolled in CA, AZ2 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 2

Specialty

Obstetrics/Gynecology

Education

Drexel University College of Medicine, 1999

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Valley Perinatal Services LLCGroup PAC ID 1658505011, 61 clinicians

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: kristin.williams.2@20219.direct.athenahealth.com
• FHIR API: https://api.platform.athenahealth.com/20219/brand/1/csg/1/fhir/r4
• Direct secure messaging: kristin.williams.1@20219.direct.athenahealth.com
• Direct secure messaging: kwilliams148815@radychildrens.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.

• Valley Perinatal Services, LLC

  • Maternal & Fetal Medicine Physician
  • Chandler, AZ
  • NPI 1174866743
  Medicare reassignment Care Compare group NPD
• Rady Children'S Hospital San Diego

  • Pediatrics Physician
  • San Diego, CA
  • NPI 1669617197
  Medicare reassignment
• Fetal and Women'S Center of Arizona, LLC

  • Specialist
  • Scottsdale, AZ
  • NPI 1801822119
  NPD (past)

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

{
    "created_epoch": "1171324800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1786492800000",
    "number": "1992847131",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "3020 CHILDRENS WAY",
            "address_2": "MC5003",
            "city": "SAN DIEGO",
            "state": "CA",
            "postal_code": "921234223",
            "telephone_number": "858-309-6300"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2620 N 3RD ST STE 103",
            "city": "PHOENIX",
            "state": "AZ",
            "postal_code": "850041153",
            "telephone_number": "480-756-6000"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "7910 Frost St",
            "address_2": "Suite # 140",
            "address_purpose": "LOCATION",
            "city": "San Diego",
            "state": "CA",
            "postal_code": "921232771",
            "country_code": "US",
            "telephone_number": "858-966-6269",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "WILLIAMS",
        "first_name": "KRISTIN",
        "middle_name": "M.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2007-02-13",
        "last_updated": "2026-08-12",
        "certification_date": "2026-08-12",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207VM0101X",
            "taxonomy_group": "",
            "desc": "Obstetrics & Gynecology, Maternal & Fetal Medicine",
            "state": "AZ",
            "license": "76897",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Keonna Marie Williams, OTD
• Kevin King James Williams II
• Kimberly Williams, RPH
• Korwyn L Williams, M.D.
• Kristen Williams, MS, RD
• Laiken Williams
• Lauren Williams, LMSW
• Liana Williams, RBT
• Lillia L Williams, PHARMD, BS
• Lindsay Nicole Williams, DO

• Maternal & Fetal Medicine Physician in Phoenix, AZ
• Providers in Phoenix, AZ by specialty
• Maternal & Fetal Medicine Physician in Arizona

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 12, 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.