Patrick Giesemann, M.D

Primary specialty

Family Medicine PhysicianTaxonomy code 207Q00000X

License

A68293 Issued in CA

Practice address

4041 Macarthur Blvd Ste 400
Newport Beach, CA 92660-2554

Phone

(949) 736-6100

Fax

(949) 736-6199

NPI assigned

Jul 11, 2006

Last updated

Aug 27, 2025By 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 2

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

Specialty

Family Practice

Education

Albany Medical College of Union University, 1997

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Hoag ClinicGroup PAC ID 3274872064, 447 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Hoag Home Health Home health agency, Newport Beach, CA, CCN 557412
• Hoag Hospice, LLC Hospice, Newport Beach, CA, CCN 551666
• Hoag Memorial Hospital Presbyterian Hospital, Newport Beach, CA, CCN 050224

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• FHIR API: https://api.platform.athenahealth.com/10944/brand/3/csg/1/fhir/r4
• FHIR API: https://fhir.nextgen.com/nge/prod/fhir-api-r4/fhir/r4/

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.

• Hoag Clinic

  • Primary Care Clinic/Center
  • Newport Beach, CA
  • NPI 1942799523
  Medicare reassignment Care Compare group NPD

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

• Hoag Home Health LLC

  • Home Health Agency
  • Newport Beach, CA
  • NPI 1174192892
  Care Compare affiliation
• Hoag Hospice LLC

  • Community Based Hospice Care Agency
  • Orange, CA
  • NPI 1619255106
  Care Compare affiliation
• Hoag Memorial Hospital Presbyterian

  • General Acute Care Hospital
  • Newport Beach, CA
  • NPI 1518951300
  Care Compare affiliation

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

{
    "created_epoch": "1152576000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1756252800000",
    "number": "1649204785",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "4041 MACARTHUR BLVD STE 400",
            "city": "NEWPORT BEACH",
            "state": "CA",
            "postal_code": "926602554",
            "telephone_number": "949-736-6100",
            "fax_number": "949-736-6199"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "4041 MACARTHUR BLVD STE 400",
            "city": "NEWPORT BEACH",
            "state": "CA",
            "postal_code": "926602554",
            "telephone_number": "949-736-6100",
            "fax_number": "949-736-6199"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "GIESEMANN",
        "first_name": "PATRICK",
        "credential": "M.D",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-07-11",
        "last_updated": "2025-08-27",
        "certification_date": "2025-08-27",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207Q00000X",
            "taxonomy_group": "",
            "desc": "Family Medicine",
            "state": "CA",
            "license": "A68293",
            "primary": true
        },
        {
            "code": "207QG0300X",
            "taxonomy_group": "",
            "desc": "Family Medicine, Geriatric Medicine",
            "state": "CA",
            "license": "A68293",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Mohamed Zahan Ghyaz, MD
• Alexandra Gianformaggio
• Francesca Gianformaggio
• Jack R Giangiulio, DC
• Alexis Giermann, LCSW
• Gigi Kroll McConnaughey
• Gigi Kroll MD, Apc
• Gilda Gilak, D.C
• Gilda Gilak Chiropractic Inc
• Harpal Singh Gill, D.C

• Family Medicine Physician in Newport Beach, CA
• Providers in Newport Beach, CA by specialty
• Family Medicine Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 27, 2025; 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.