Ismail Deniz, MD

Primary specialty

Psychiatry PhysicianTaxonomy code 2084P0800X

License

194547 Issued in CA

Practice address

15615 Alton Pkwy Ste 220
Irvine, CA 92618-7305

Phone

(949) 665-9136

Fax

(310) 912-6743

NPI assigned

Mar 23, 2019

Sex

Male

Sole proprietor

No

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

Specialties & licenses 3

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

Psychiatry

Education

Other, 2013

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Hiawatha Harris MD Inc.Group PAC ID 1052580115, 12 clinicians

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Networks

• Healthfirst Medicare Network H1722
• Healthfirst Medicare Network H3359
• Healthfirst Medicare Network H5989
• Healthfirst Medicare Network H9678

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.

• Hiawatha Harris, M.D., Inc.

  • Mental Health Counselor
  • Oakland, CA
  • NPI 1942420724
  Medicare reassignment Care Compare group NPD
• Cuneyt Tegin MD Inc

  • Psychiatry Physician
  • Irvine, CA
  • NPI 1962102814
  NPD
• Hiawatha Harris, Corporation

  • Clinical Child & Adolescent Psychologist
  • Martinez, CA
  • NPI 1407063936
  NPD

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

{
    "created_epoch": "1553299200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1752451200000",
    "number": "1619437704",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "757 WESTWOOD PLZ",
            "city": "LOS ANGELES",
            "state": "CA",
            "postal_code": "900957419"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "15615 ALTON PKWY STE 220",
            "city": "IRVINE",
            "state": "CA",
            "postal_code": "926187305",
            "telephone_number": "949-665-9136",
            "fax_number": "310-912-6743"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "DENIZ",
        "first_name": "ISMAIL",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2019-03-23",
        "last_updated": "2025-07-14",
        "certification_date": "2025-07-14",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2084P0802X",
            "taxonomy_group": "",
            "desc": "Psychiatry & Neurology, Addiction Psychiatry",
            "state": "CA",
            "license": "194547",
            "primary": false
        },
        {
            "code": "2084P0804X",
            "taxonomy_group": "",
            "desc": "Psychiatry & Neurology, Child & Adolescent Psychiatry",
            "state": "CA",
            "license": "194547",
            "primary": false
        },
        {
            "code": "2084P0800X",
            "taxonomy_group": "",
            "desc": "Psychiatry & Neurology, Psychiatry",
            "state": "CA",
            "license": "194547",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Alexis Dendaas
• Alex Deng
• Crystal Deng
• Gary E Deng, MD
• Huijia Deng
• Dominique Denning
• Denny Y. Fang, D.D.S., Inc.
• Dental Digital Design
• Dental Sleep Care Alliance LLC
• Dentireal, Inc.

• Psychiatry Physician in Irvine, CA
• Providers in Irvine, 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 14, 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.