John Mark Geiss, D.O.

Primary specialty

Family Medicine PhysicianTaxonomy code 207Q00000X

License

20A12647 Issued in CA

Practice address

5 Hutton Centre Dr Ste 950
Santa Ana, CA 92707-8744

Phone

(855) 434-7763

Fax

(949) 281-5550

NPI assigned

Feb 21, 2013

Last updated

Sep 20, 2025By the provider in NPPES

Sex

Male

Sole proprietor

Yes

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, ID, AZ, NV, TN, OR, UT, TX, CO, GA, AL, MT, FL, IN, NE, MS, ME, CT, OK, MN, KY, OH, WI, NJ, NC, LA, IL, NY, WA, SD, MA, MD, PA, NH, DE, VA, NM, SC, IA, ND, MO, KS43 enrollments

Enrollment records 43

Specialty

Osteopathic Manipulative Medicine

Education

Other, 2011

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Practice addresses (Care Compare)

Hospital & facility affiliations

• Advent Healthcare Services, Inc Home health agency, Diamond Bar, CA, CCN 058466
• Legacy Home Health, Inc Home health agency, Rancho Cucamonga, CA, CCN 058432
• Geiss Med Hospice LLC Hospice, Santa Ana, CA, CCN A01734
• Sunny Hills Post Acute Nursing home, La Mirada, CA, CCN 055737
• Whittier Hills Health Care Ctr Nursing home, Whittier, CA, CCN 055430
• Imperial Healthcare Center Nursing home, La Mirada, CA, CCN 056115
• The Pavilion at Sunny Hills Nursing home, Fullerton, CA, CCN 555733

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Osteopathy

State licenses

Practice roles

Locations (25 of 61)

Networks

• BSC 65 PLUS INDIVIDUAL MAPD

Interoperability endpoints

• FHIR API: https://api.platform.athenahealth.com/19831/brand/2/csg/1/fhir/r4
• FHIR API: https://fhir.nextgen.com/nge/prod/fhir-api-r4/fhir/r4/

All facility ownership & control disclosures 5

Facilities whose Medicare enrollment lists this provider’s PECOS associate ID as an owner or managing party.

Owned or controlled facilities with NPI records 5

Facilities whose Medicare enrollment lists this provider as an owner, officer, director or managing party.

• Dan Home Health Care, Inc.

  dba Remedy Home Health Care

  • Home Health Agency
  • Northridge, CA
  • NPI 1609040740

  5% Or Greater Indirect Ownership Interest

  CMS ownership
• Geiss Med Hospice LLC

  • Community Based Hospice Care Agency
  • Santa Ana, CA
  • NPI 1962978429

  5% Or Greater Direct Ownership Interest, Operational/Managerial Control

  CMS ownership
• South County Hospice, Inc.

  dba Cabrillo Hospice

  • Community Based Hospice Care Agency
  • San Juan Capistrano, CA
  • NPI 1518322593

  5% Or Greater Indirect Ownership Interest

  CMS ownership
• Dahlia Hospice

  dba Prohealth Hospice

  • Community Based Hospice Care Agency
  • Las Vegas, NV
  • NPI 1780358333

  5% Or Greater Indirect Ownership Interest, Contracted Managing Employee

  CMS ownership
• Geiss Med Hospice Id LLC

  • Community Based Hospice Care Agency
  • Nampa, ID
  • NPI 1861136335

  5% Or Greater Direct Ownership Interest, Corporate Director, Corporate Officer, W-2 Managing Employee

  CMS ownership

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.

• Geiss Med Nevada PC

  • Family Medicine Physician
  • Orange, CA
  • NPI 1033793963

  NV

  Medicare reassignment NPD Authorized official
• Senior Doc Az Medical PC

  • Family Medicine Physician
  • Orange, CA
  • NPI 1790550895

  AZ

  Medicare reassignment NPD Authorized official
• Senior Doc Id Medical, PC

  • Family Medicine Physician
  • Orange, CA
  • NPI 1407639941

  ID

  Medicare reassignment NPD Authorized official
• Senior Doc Iowa PC

  • Family Medicine Physician
  • Santa Ana, CA
  • NPI 1558241794

  IA

  Medicare reassignment NPD Authorized official
• Senior Doc Kentucky PSC

  • Family Medicine Physician
  • Santa Ana, CA
  • NPI 1548140684

  KY

  Medicare reassignment NPD Authorized official
• Senior Doc New Hampshire PC

  • Internal Medicine Physician
  • Orange, CA
  • NPI 1750136081

  NH

  Medicare reassignment NPD Authorized official
• Senior Doc North Carolina PC

  • Family Medicine Physician
  • Santa Ana, CA
  • NPI 1902786049

  NC

  Medicare reassignment NPD Authorized official
• Senior Doc North Dakota PC

  • Family Medicine Physician
  • Orange, CA
  • NPI 1760237093

  ND

  Medicare reassignment NPD Authorized official
• Senior Doc Virginia PC

  • Family Medicine Physician
  • Santa Ana, CA
  • NPI 1669352704

  VA

  Medicare reassignment NPD Authorized official
• Geiss Medical New York PC

  • Family Medicine Physician
  • Buffalo, NY
  • NPI 1487539979
  Medicare reassignment NPD Authorized official
• Senior Doc Idaho PC

  • Family Medicine Physician
  • Nampa, ID
  • NPI 1750961637
  Medicare reassignment NPD Authorized official
• Senior Doc Kansas PA

  • Family Medicine Physician
  • Overland Park, KS
  • NPI 1649145467
  Medicare reassignment NPD Authorized official

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

• Advent Healthcare Services, Inc.

  • Home Health Agency
  • Diamond Bar, CA
  • NPI 1558473272
  Care Compare affiliation
• Ensign Whittier East LLC

  dba Whittier Hills Healthcare Center

  • Skilled Nursing Facility
  • Whittier, CA
  • NPI 1255326039

  Nursing home

  Care Compare affiliation
• Fullerton Healthcare & Wellness Centre, LP

  dba The Pavilion at Sunny Hills

  • Skilled Nursing Facility
  • Fullerton, CA
  • NPI 1073944450

  Nursing home

  Care Compare affiliation
• Geiss Med Hospice LLC

  • Community Based Hospice Care Agency
  • Santa Ana, CA
  • NPI 1962978429
  Care Compare affiliation
• La Mirada Healthcare, LLC

  • Skilled Nursing Facility
  • La Mirada, CA
  • NPI 1255742904

  Nursing home

  Care Compare affiliation
• La Mirada Post Acute LLC

  dba Sunny Hills Post Acute

  • Skilled Nursing Facility
  • La Mirada, CA
  • NPI 1891420394

  Nursing home

  Care Compare affiliation
• Legacy Home Health, Inc.

  dba Plexus Healthcare Inc.

  • Home Health Agency
  • Rancho Cucamonga, CA
  • NPI 1225563976
  Care Compare affiliation

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

{
    "created_epoch": "1361404800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1758326400000",
    "number": "1053651497",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "5 HUTTON CENTRE DR STE 950",
            "city": "SANTA ANA",
            "state": "CA",
            "postal_code": "927078744",
            "telephone_number": "855-434-7763",
            "fax_number": "949-281-5550"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "5 HUTTON CENTRE DR STE 950",
            "city": "SANTA ANA",
            "state": "CA",
            "postal_code": "927078744",
            "telephone_number": "855-434-7763",
            "fax_number": "949-281-5550"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "GEISS",
        "first_name": "JOHN",
        "middle_name": "MARK",
        "name_prefix": "Dr.",
        "credential": "D.O.",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2013-02-21",
        "last_updated": "2025-09-20",
        "certification_date": "2025-09-20",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207Q00000X",
            "taxonomy_group": "",
            "desc": "Family Medicine",
            "state": "CA",
            "license": "20A12647",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Marc Jezer Chan Gebala
• Alberto Gedissman, M.D.
• Geeta Seth DDS, Inc
• Alexis Geibler
• Geiss Med Hospice LLC
• Symone Betty Gelay
• Carole Gelker, PHD
• Alexandra Lindsay Geltman
• Nabil S Gemayel
• Nancy Gemayel, PSY.D

• Family Medicine Physician in Santa Ana, CA
• Providers in Santa Ana, 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 Sep 20, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; facility enrollments, owners and changes of ownership; Provider of Services certification data.
• 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.