Karine Hajyan, DO

Primary specialty

Obstetrics & Gynecology PhysicianTaxonomy code 207V00000X

License

20A12220 Issued in CA

Practice address

970 Dewing Ave Ste 301
Lafayette, CA 94549-4284

Phone

(925) 385-7023

NPI assigned

Mar 1, 2010

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

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

Obstetrics/Gynecology

Education

Lake Erie College of Osteopathic Medicine, Erie, 2007

Medicare assignment

May accept Medicare assignment

Telehealth

Offers telehealth services

Group practices

John Muir Physician NetworkGroup PAC ID 6608789813, 488 clinicians

Obstetrix Medical Group of California a Professional CorporationGroup PAC ID 0244120939, 15 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• John Muir Medical Center - Walnut Creek Campus Hospital, Walnut Creek, CA, CCN 050180

Merit-based Incentive Payment System (MIPS)

Final score

90.32 of 100Reported as group

Quality

89.54

Promoting interoperability

100

Improvement activities

40

Cost

74.34

Procedures performed for Medicare patients

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Osteopathy

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: khajyan177935@ehr.johnmuirhealth.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.

• John Muir Physician Network

  • General Practice Physician
  • Walnut Creek, CA
  • NPI 1841407665
  Medicare reassignment Care Compare group NPD
• Obstetrix Medical Group of California, a Professional Corporation

  • Maternal & Fetal Medicine Physician
  • Campbell, CA
  • NPI 1629175336
  Medicare reassignment Care Compare group
• John Muir Trauma Physicians Billing Service

  • Hospitalist Physician
  • Walnut Creek, CA
  • NPI 1093864837
  Medicare reassignment NPD
• Permanente Medical Group Inc

  • Internal Medicine Physician
  • Santa Clara, CA
  • NPI 1073606299

  Obstetrics & Gynecology

  Medicare reassignment NPD
• Alameda Health System

  • Surgery Physician
  • Oakland, CA
  • NPI 1740332931
  Medicare reassignment
• DHP of California Medical Group Inc

  • Obstetrics & Gynecology Physician
  • Stockton, CA
  • NPI 1679836084
  Medicare reassignment
• John Muir Trauma Physicians Billing Service

  • Trauma Surgery Physician
  • Walnut Creek, CA
  • NPI 1962551861
  NPD
• Permanente Medical Group, Inc

  • Clinical Medical Laboratory
  • San Jose, CA
  • NPI 1497971584
  NPD

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

• John Muir Health

  • General Acute Care Hospital
  • Walnut Creek, CA
  • NPI 1740215219
  Care Compare affiliation

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

{
    "created_epoch": "1267401600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1785628800000",
    "number": "1154644425",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "970 DEWING AVE STE 301",
            "city": "LAFAYETTE",
            "state": "CA",
            "postal_code": "945494284",
            "telephone_number": "925-385-7023"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "970 DEWING AVE STE 301",
            "city": "LAFAYETTE",
            "state": "CA",
            "postal_code": "945494284",
            "telephone_number": "925-385-7023"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "HAJYAN",
        "first_name": "KARINE",
        "credential": "DO",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2010-03-01",
        "last_updated": "2026-08-02",
        "certification_date": "2026-08-02",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207V00000X",
            "taxonomy_group": "",
            "desc": "Obstetrics & Gynecology",
            "state": "CA",
            "license": "20A12220",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Gurinder K Randhawa MD Inc
• Kathy V Gusenkov
• Scott Gwilliam, FNP-BC
• Tina Michele Hadaway, RN
• Natasha Y Hadweh
• Debra Halliday, M.A., MFT, SEP
• Rahil Hamidi
• Hammad Shere DMD Inc
• Sharlene Marie Hanaway, MFT
• Elizabeth G Hansen, IBCLC

• Obstetrics & Gynecology Physician in Lafayette, CA
• Providers in Lafayette, CA by specialty
• Obstetrics & Gynecology Physician in California

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