Helen Zukin-O'Callaghan

Primary specialty

Gynecology PhysicianTaxonomy code 207VG0400X

License

A199431 Issued in CA

Practice address

751 S Bascom Ave
San Jose, CA 95128-2604

Phone

(805) 450-3279

NPI assigned

Apr 15, 2021

Last updated

Aug 14, 2025By 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 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

Other, 2021

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

County of Santa ClaraGroup PAC ID 1254244973, 1,000 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Santa Clara Valley Medical Center Hospital, San Jose, CA, CCN 050038

Medicare enrollment (NPD)

Enrolled

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: hzukinocallagh175709@santaclaravalley.direct-ci.net

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.

• County of Santa Clara

  dba Josefina Narvaez Mental Health Center MH Aoa

  • Mental Health Clinic/Center (Including Community Mental Health Center)
  • San Jose, CA
  • NPI 1699885079
  Medicare reassignment Care Compare group NPD
• County of Santa Clara

  dba SCVMC Physician Services

  • Anesthesiology Physician
  • San Jose, CA
  • NPI 1588721500
  NPD
• County of Santa Clara

  dba SCVMC Outpatient Pharmacy

  • Pharmacy
  • San Jose, CA
  • NPI 1891871919
  NPD
• County of Santa Clara

  • Federally Qualified Health Center (FQHC)
  • Gilroy, CA
  • NPI 1922093533
  NPD

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

• County of Santa Clara

  dba Inpatient Acute/Outpatient Facility Services

  • General Acute Care Hospital
  • San Jose, CA
  • NPI 1063406551
  Care Compare affiliation

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

{
    "created_epoch": "1618444800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1755129600000",
    "number": "1578144143",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "751 S BASCOM AVE",
            "city": "SAN JOSE",
            "state": "CA",
            "postal_code": "951282604"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "751 S BASCOM AVE",
            "city": "SAN JOSE",
            "state": "CA",
            "postal_code": "951282604",
            "telephone_number": "805-450-3279"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "ZUKIN-O'CALLAGHAN",
        "first_name": "HELEN",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2021-04-15",
        "last_updated": "2025-08-14",
        "certification_date": "2025-08-14",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207VG0400X",
            "taxonomy_group": "",
            "desc": "Obstetrics & Gynecology, Gynecology",
            "state": "CA",
            "license": "A199431",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Christina M. Zubach
• Mary Helen Zuccaro, FNP-BC
• Jonathan Zuchowski, DC
• Paul Jacob Zuchowski, DC
• Courtney Zucker, ASW
• Mark Douglas Zukunft, M.D.
• Kristen Zung
• Jennie Zuniga
• Jose Zuniga
• Monica Guadalupe Zuniga

• Gynecology Physician in San Jose, CA
• Providers in San Jose, CA by specialty
• Gynecology Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 14, 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.