Jonathon Mark Weisz, MD

Primary specialty

Pediatrics PhysicianTaxonomy code 208000000X

License

G74937 Issued in CA

Practice address

420 W Rowland St
Covina, CA 91723-2943

Phone

(626) 331-6411

Fax

(626) 251-1560

NPI assigned

Mar 22, 2006

Last updated

Apr 13, 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 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

Interoperability endpoints

• Direct secure messaging: jweisz206563@westdirect.optum.com

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.

• Healthcare Partners Affiliates Medical Group

  dba Optum

  • Internal Medicine Physician
  • Los Angeles, CA
  • NPI 1659312593
  Medicare reassignment NPD
• Healthcare Partners Affiliates Medical Group

  dba Optum

  • Durable Medical Equipment & Medical Supplies
  • Murrieta, CA
  • NPI 1760057269
  NPD
• Healthcare Partners Affiliates Medical Group

  dba Optum

  • Addiction Medicine (Internal Medicine) Physician
  • Tustin, CA
  • NPI 1891981502
  NPD
• Emanate Health Medical Center

  dba Citrus Valley Medical Center Queen Of the Valley Campus

  • General Acute Care Hospital
  • West Covina, CA
  • NPI 1063441293
  NPD (past)
• Emanate Health Medical Center

  dba Citrus Valley Medical Center Inter-Community Campus

  • General Acute Care Hospital
  • Covina, CA
  • NPI 1982629440
  NPD (past)
• San Dimas Community Hospital, Inc.

  dba San Dimas Community Hospital

  • Skilled Nursing Facility
  • San Dimas, CA
  • NPI 1568487619
  NPD (past)
• St. Joseph Health Northern California, LLC

  dba Providence Queen of the Valley Medical Center

  • Rehabilitation Hospital Unit
  • Napa, CA
  • NPI 1609947282
  NPD (past)
• Memorial Medical Group Inc

  • Durable Medical Equipment & Medical Supplies
  • Phoenix, AZ
  • NPI 1255523643
  NPD (past)

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

{
    "created_epoch": "1142985600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1776038400000",
    "number": "1841259298",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 35380",
            "city": "LAS VEGAS",
            "state": "NV",
            "postal_code": "891335380",
            "telephone_number": "702-579-3203"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "420 W ROWLAND ST",
            "city": "COVINA",
            "state": "CA",
            "postal_code": "917232943",
            "telephone_number": "626-331-6411",
            "fax_number": "626-251-1560"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "WEISZ",
        "first_name": "JONATHON",
        "middle_name": "MARK",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-03-22",
        "last_updated": "2026-04-13",
        "certification_date": "2026-04-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "208000000X",
            "taxonomy_group": "",
            "desc": "Pediatrics",
            "state": "CA",
            "license": "G74937",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Marjorie Webster, PT
• Michael Weden
• Zackary Weir
• John Purnell Weirick
• Melinda Joy Weiss
• Wel-Mor Psychology Group, Inc
• Destiny Wells
• Elijah Wells
• Jacqueline Wells
• Michael Job Wells

• Pediatrics Physician in Covina, CA
• Providers in Covina, CA by specialty
• Pediatrics Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Apr 13, 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.