Zachary Charles Herzfeldt, M.D.

Primary specialty

Psychiatry PhysicianTaxonomy code 2084P0800X

License

A148801 Issued in CA

Practice address

21015 Pathfinder Rd Ste 100
Diamond Bar, CA 91765-4002

Phone

(909) 468-2300

NPI assigned

May 27, 2015

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

Merit-based Incentive Payment System (MIPS)

Final score

88.87 of 100Reported as group

Quality

72.13

Promoting interoperability

80

Improvement activities

40

Cost

77.36

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.

• Faculty Physicians and Surgeons of Llusm

  • Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician
  • Apple Valley, CA
  • NPI 1205009917
  Medicare reassignment NPD
• Faculty Physicians and Surgeons of Llusm

  • Psychiatry Physician
  • Redlands, CA
  • NPI 1558311373
  NPD
• Faculty Physicians and Surgeons of Llusm

  • Family Medicine Physician
  • Moreno Valley, CA
  • NPI 1558788331
  NPD

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

{
    "created_epoch": "1432684800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783555200000",
    "number": "1205215936",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "21015 PATHFINDER RD STE 100",
            "city": "DIAMOND BAR",
            "state": "CA",
            "postal_code": "917654002"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "21015 PATHFINDER RD STE 100",
            "city": "DIAMOND BAR",
            "state": "CA",
            "postal_code": "917654002",
            "telephone_number": "909-468-2300"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "HERZFELDT",
        "first_name": "ZACHARY",
        "middle_name": "CHARLES",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2015-05-27",
        "last_updated": "2026-07-09",
        "certification_date": "2026-07-09",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2084P0800X",
            "taxonomy_group": "",
            "desc": "Psychiatry & Neurology, Psychiatry",
            "state": "CA",
            "license": "A148801",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Heavenly Care Transportation
• Hector Z. Landig, D.M.D., Inc.
• Marsha Hernandez
• Debra Herrera
• Edwin Herrero
• HHL Care Corporation
• Stephen William Hill, PH.D.
• Elmer Enerio Hilo II, DMD
• David T Hinman
• Nidia Andrea Hitschfeld Valdera, SLP

• Psychiatry Physician in Diamond Bar, CA
• Providers in Diamond Bar, CA by specialty
• Psychiatry Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 9, 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.