Alexander Oparin, M.D.

Primary specialty

Family Medicine PhysicianTaxonomy code 207Q00000X

License

A111603 Issued in CA

Practice address

2041 East St Ste 1198
Concord, CA 94520-2126

Phone

(925) 322-1834

Fax

(925) 567-9321

NPI assigned

Sep 4, 2008

Sex

Male

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

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 and National Provider Directory roles.

• Permanente Medical Group Inc

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

  Family Medicine

  Medicare reassignment NPD
• Permanente Medical Group Inc

  • Internal Medicine Physician
  • Stockton, CA
  • NPI 1548343510

  Family Medicine

  NPD
• Permanente Medical Group, Inc

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

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

{
    "created_epoch": "1220486400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1780444800000",
    "number": "1376791152",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "2041 EAST ST STE 1198",
            "city": "CONCORD",
            "state": "CA",
            "postal_code": "945202126",
            "telephone_number": "925-322-1834",
            "fax_number": "925-567-9321"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2041 EAST ST STE 1198",
            "city": "CONCORD",
            "state": "CA",
            "postal_code": "945202126",
            "telephone_number": "925-322-1834",
            "fax_number": "925-567-9321"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "OPARIN",
        "first_name": "ALEXANDER",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2008-09-04",
        "last_updated": "2026-06-03",
        "certification_date": "2026-06-03",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207Q00000X",
            "taxonomy_group": "",
            "desc": "Family Medicine",
            "state": "CA",
            "license": "A111603",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Jechol Liah Ontiveros
• Roxanne Michelle Ontiveros
• Nkechi Caroline Onuoha, RPH
• Obioma Onuoha
• Samuel Onyewumbu, LICDC,PMC, MCAP.
• Rose Nneka Opene
• Jennings Oppenhimer
• Peter Oppermann, PHD
• Options Recovery Services
• Minnie C Orais

• Family Medicine Physician in Concord, CA
• Providers in Concord, CA by specialty
• Family Medicine Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 3, 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.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.