Individual provider Active NPI

James Stephen Allen, D.O.

  • Internal Medicine Physician
  • San Ramon, CA
National Provider Identifier
1902099518
Registry record updated Mar 17, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Internal Medicine PhysicianTaxonomy code 207R00000X
License
159380-1 Issued in NY
Practice address
6001 Bollinger Canyon Rd
Chevron Singapore-Orchard
San Ramon, CA 94583-7170
Phone
(925) 842-3224
Fax
(925) 842-3242
NPI assigned
Aug 27, 2007
Last updated
Mar 17, 2026By the provider in NPPES
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Mar 17, 2026

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Internal Medicine Physician 207R00000X OP61072641 WA
Internal Medicine Physician 207R00000X 159380-1 NY Primary

Addresses

Primary practice location

6001 Bollinger Canyon Rd
Chevron Singapore-Orchard
San Ramon, CA 94583-7170

Mailing address

6001 Bollinger Canyon Rd
San Ramon, CA 94583-2324
Phone (925) 842-3224

Other practice location 1

1813 Sumner Ave
Aberdeen, WA 98520-4600
Phone (360) 538-1293

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in WA
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

Enrollment IDStateProvider typePAC IDDetails
I20260330003568 WA Practitioner - Internal Medicine 7315422110 Reassigns benefits to 1 organization

Care Compare profile

Medicare Care Compare
Specialty
Internal Medicine
Education
Other, 1983
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
Sea Mar Community Health CentersGroup PAC ID 7315831161, 235 clinicians

Practice addresses (Care Compare)

1813 Sumner Ave
Aberdeen, WA 98520-4600
Phone (360) 538-1293

Hospital & facility affiliations

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Osteopathy

State licenses

LicenseStateTypeSpecialty
159380-1NYMDInternal Medicine Physician
OP61072641WAMDInternal Medicine Physician

Organizations & group practices 1

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.

Hospital & facility affiliations 1

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

NPI Registry JSON

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

{
    "created_epoch": "1188172800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1773705600000",
    "number": "1902099518",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "6001 BOLLINGER CANYON RD",
            "city": "SAN RAMON",
            "state": "CA",
            "postal_code": "945832324",
            "telephone_number": "925-842-3224",
            "fax_number": "925-842-3242"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "6001 BOLLINGER CANYON RD",
            "address_2": "CHEVRON SINGAPORE-ORCHARD",
            "city": "SAN RAMON",
            "state": "CA",
            "postal_code": "945837170",
            "telephone_number": "925-842-3224",
            "fax_number": "925-842-3242"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "1813 Sumner Ave",
            "address_purpose": "LOCATION",
            "city": "Aberdeen",
            "state": "WA",
            "postal_code": "985204600",
            "country_code": "US",
            "telephone_number": "360-538-1293",
            "fax_number": "360-538-3908",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "ALLEN",
        "first_name": "JAMES",
        "middle_name": "STEPHEN",
        "name_prefix": "Dr.",
        "credential": "D.O.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2007-08-27",
        "last_updated": "2026-03-17",
        "certification_date": "2026-03-17",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "WA",
            "license": "OP61072641",
            "primary": false
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "NY",
            "license": "159380-1",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in San Ramon, CA

Sources for this page

Verify at the official NPI Registry.