Quadmed Medical Clinics of California, Inc.

Primary specialty

Primary Care Clinic/CenterTaxonomy code 261QP2300X

Legal business name

QUADMED MEDICAL CLINICS OF CALIFORNIA, INC.

Practice address

2065 Keystone Pacific Parkway
Patterson, CA 95363

Phone

(888) 235-8462

NPI assigned

Apr 10, 2018

Organization subpart

No

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

Authorized official

Name

Jefferson Harman, MD

Title

Medical Director

Phone

(414) 566-8400

Specialties & licenses 1

Addresses

Other names 1

• Patterson, CA Other name

Tax ID family

Patterson Ca2 organizations share this tax ID, including this one

Other organizations with this tax ID 1

Organizations that report the same tax identification number in the National Provider Directory.

• Quadmed Medical Clinics of California, Inc.

  • Primary Care Clinic/Center
  • San Bernardino, CA
  • NPI 1487151098
  NPD tax ID

Locations

Practitioners 1

Individual providers connected to this organization through Medicare benefit reassignment, Care Compare group membership or National Provider Directory roles.

• Ann B Merkow, M.D.

  • Internal Medicine Physician
  • West Allis, WI
  • NPI 1528035383
  NPD

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

{
    "created_epoch": "1523318400000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1759881600000",
    "number": "1871090472",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "W227N6103 SUSSEX RD",
            "city": "SUSSEX",
            "state": "WI",
            "postal_code": "530893969",
            "telephone_number": "414-566-8400",
            "fax_number": "414-566-8400"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2065 KEYSTONE PACIFIC PARKWAY",
            "city": "PATTERSON",
            "state": "CA",
            "postal_code": "95363",
            "telephone_number": "888-235-8462"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "QUADMED MEDICAL CLINICS OF CALIFORNIA, INC.",
        "organizational_subpart": "NO",
        "enumeration_date": "2018-04-10",
        "last_updated": "2025-10-08",
        "certification_date": "2025-10-08",
        "status": "A",
        "authorized_official_last_name": "HARMAN",
        "authorized_official_first_name": "JEFFERSON",
        "authorized_official_title_or_position": "MEDICAL DIRECTOR",
        "authorized_official_telephone_number": "414-566-8400",
        "authorized_official_credential": "MD"
    },
    "taxonomies": [
        {
            "code": "261QP2300X",
            "taxonomy_group": "",
            "desc": "Clinic/Center, Primary Care",
            "state": null,
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "organization_name": "Patterson, CA",
            "code": "5",
            "type": "Other Name"
        }
    ]
}

• Leonard Piotrzkowski
• Steven M Pittson, D.C.
• Kiana Presley
• Alejandra Prieto de Chavez, FNP-C
• Priority Transit, LLC
• Jocelyn Quevedo
• Elizabeth Ann Raines Azwell, FNP
• Jessica Ramirez-Aguilar, NP
• Daniel Michael Ramirez, FNP
• Michael Ratliff, MSN RN FNP-C

• Primary Care Clinic/Center in Patterson, CA
• Providers in Patterson, CA by specialty
• Primary Care Clinic/Center in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Oct 8, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.