NPIMap

Individual provider Active NPI

Thomas Andrew Hryniewicki, M.D.

  • Internal Medicine Physician
  • Orange, CA
National Provider Identifier
1992807341
Registry record updated Nov 20, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Internal Medicine PhysicianTaxonomy code 207R00000X
License
G50543 Issued in CA
Practice address
845 E Chapman Ave
Orange, CA 92866-1622
Phone
(714) 997-2899
Fax
(714) 289-7062
NPI assigned
Sep 5, 2006
Sex
Male
Sole proprietor
Yes

NPPES NPI Registry

Updated by the provider on Nov 20, 2025

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Internal Medicine Physician 207R00000X G50543 CA Primary

Addresses

Primary practice location

845 E Chapman Ave
Orange, CA 92866-1622

Mailing address

PO Box 35380
Las Vegas, NV 89133-5380
Phone (702) 579-3203

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in CA
Eligible to order & refer
  • Part B services
  • Medical equipment
  • Home health
  • Power mobility devices
  • Hospice
Green means eligible to order or refer.

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20101214000001 CA Practitioner - Internal Medicine 8022205236 Reassigns benefits to 2 organizations

Care Compare profile

Medicare Care Compare
Specialty
Internal Medicine
Education
University of California, Irvine, California College of Medicine, 1987
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Telehealth
Offers telehealth services
Group practices
Centers for Family Medicine GPGroup PAC ID 9931143799, 87 clinicians
Healthcare Partners Affiliates Medical GroupGroup PAC ID 7315842002, 775 clinicians

Practice addresses (Care Compare)

3460 Katella Ave
Los Alamitos, CA 90720-2334
Phone (562) 594-6599

845 E Chapman Ave
Orange, CA 92866-1622
Phone (714) 997-2899

Hospital & facility affiliations

  • Leo Home Health Inc Home health agency, Van Nuys, CA, CCN 757894
  • Providence at Home With Compassus Home Health Orange County Home health agency, Anaheim, CA, CCN 057600
  • Hollywood Home Health Services Home health agency, N Hollywood, CA, CCN 058310
  • Providence at Home With Compassus Home Health, Orange County South Home health agency, Irvine, CA, CCN 058238
  • Hoag Memorial Hospital Presbyterian Hospital, Newport Beach, CA, CCN 050224
  • Providence St. Joseph Hospital Hospital, Orange, CA, CCN 050069
  • Providence St. Jude Medical Center Hospital, Fullerton, CA, CCN 050168
  • Memorialcare Saddleback Medical Center Hospital, Laguna Hills, CA, CCN 050603

Procedures performed for Medicare patients

ProcedureNumber of procedures
Removal of skin lesions1-10

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Medicine

State licenses

LicenseStateTypeSpecialty
G50543CAMDInternal Medicine Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Centers for Family Medicine GP Internal Medicine CurrentSince Apr 17, 2024 Accepting new patients
Healthcare Partners Affiliates Medical Group Internal Medicine CurrentSince Sep 1, 2025 Accepting new patients
Healthcare Partners Affiliates Medical Group CurrentSince Sep 1, 2025 Accepting new patients
Memorial Medical Group Inc Past Accepting new patients
St Joseph Hospital of Orange Past Accepting new patients

Locations

1236 N Magnolia Ave
Anaheim, CA 92801
Phone (714) 995-1000

5957 W Ramsey St
Banning, CA 92220
Phone (951) 845-8864

2910 Jefferson St
Ste 100
Carlsbad, CA 92008
Phone (760) 729-8600

824 E Carson St
Ste 104
Carson, CA 90745
Phone (310) 830-9706

3460 Katella Ave
Los Alamitos, CA 90720
Phone (310) 594-6599

845 E Chapman Ave
Orange, CA 92866
Phone (714) 997-2899

1700 N Waterman Ave
Sn Bernrdno, CA 92404
Phone (909) 883-8611

Networks

  • BSC 65 PLUS INDIVIDUAL MAPD

Interoperability endpoints

  • Direct secure messaging: thomas.hryniewicki.p33@direct.monarchhealthcare.nextgenshare.com

Organizations & group practices 5

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.

Hospital & facility affiliations 10

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

NPI Registry JSON

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

{
    "created_epoch": "1157414400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1763596800000",
    "number": "1992807341",
    "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": "845 E CHAPMAN AVE",
            "city": "ORANGE",
            "state": "CA",
            "postal_code": "928661622",
            "telephone_number": "714-997-2899",
            "fax_number": "714-289-7062"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "HRYNIEWICKI",
        "first_name": "THOMAS",
        "middle_name": "ANDREW",
        "credential": "M.D.",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2006-09-05",
        "last_updated": "2025-11-20",
        "certification_date": "2025-11-20",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "CA",
            "license": "G50543",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Orange, CA

Sources for this page

Verify at the official NPI Registry.