John Wesley Patresan, MD

Primary specialty

Hematology & Oncology PhysicianTaxonomy code 207RH0003X

License

A205802 Issued in CA

Practice address

2500 Alhambra Ave
Martinez, CA 94553-3156

Phone

(925) 370-5000

NPI assigned

Mar 22, 2020

Last updated

Aug 8, 2026By the provider in NPPES

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 RI

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

Hematology/Oncology

Education

Other, 2020

Medicare assignment

May accept Medicare assignment

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

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

{
    "created_epoch": "1584835200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1786147200000",
    "number": "1023644978",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "2500 ALHAMBRA AVE",
            "city": "MARTINEZ",
            "state": "CA",
            "postal_code": "945533156",
            "telephone_number": "209-207-4069"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2500 ALHAMBRA AVE",
            "city": "MARTINEZ",
            "state": "CA",
            "postal_code": "945533156",
            "telephone_number": "925-370-5000"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "PATRESAN",
        "first_name": "JOHN",
        "middle_name": "WESLEY",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2020-03-22",
        "last_updated": "2026-08-08",
        "certification_date": "2026-08-08",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RH0003X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Hematology & Oncology",
            "state": "CA",
            "license": "A205802",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Arpita P Patel, PHARM.D.
• Ekta Patel, PHARMD
• Vikas Virendra Patel, P.A
• Deborah Susan Paterson, RN
• Lydia Patkay, MA/CAGS
• James Andrew Patrizi, PT, CWS, FCCWS
• Priscilla Nicole Payne, PHARM.D.
• Katherine Ellen Pecson, P.T.
• Gary Robert Pelz, PHYSICAL THERAPIST
• Yu-Hung Patty Peng, MD

• Hematology & Oncology Physician in Martinez, CA
• Providers in Martinez, CA by specialty
• Hematology & Oncology Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 8, 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.