Thomas J Grayden, MD

Primary specialty

Psychiatry PhysicianTaxonomy code 2084P0800X

License

G50401 Issued in CA

Practice address

3151 Airway Ave Ste G1
Costa Mesa, CA 92626-4624

Phone

(714) 545-5550

NPI assigned

Dec 29, 2006

Reactivated

Jan 24, 2024

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, AZ2 enrollments

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 2

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Networks

• BSC 65 PLUS INDIVIDUAL MAPD

Interoperability endpoints

• Direct secure messaging: tgrayden255812@direct.valleywisehealth.org

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.

• Nebula Health, LLC

  • Adult Mental Health Clinic/Center
  • Riverside, CA
  • NPI 1194479501

  Psychiatry

  Medicare reassignment NPD
• Pacific Neuropsychiatric Specialists Inc.

  • Psychiatry Physician
  • Costa Mesa, CA
  • NPI 1356685218
  Medicare reassignment NPD
• Denova Collaborative Health, LLC

  • Multi-Specialty Clinic/Center
  • Phoenix, AZ
  • NPI 1609300854
  Medicare reassignment NPD
• Denova Collaborative Health, LLC

  • Multi-Specialty Clinic/Center
  • Peoria, AZ
  • NPI 1740079060
  NPD
• Hoag Hospital

  • General Acute Care Hospital
  • Newport Beach, CA
  • NPI 1689864365
  NPD (past)

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

{
    "created_epoch": "1167350400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1755216000000",
    "number": "1700942117",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "19782 MACARTHUR BLVD STE 300",
            "city": "IRVINE",
            "state": "CA",
            "postal_code": "926122417",
            "telephone_number": "714-545-5550"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "3151 AIRWAY AVE STE G1",
            "city": "COSTA MESA",
            "state": "CA",
            "postal_code": "926264624",
            "telephone_number": "714-545-5550"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "750 E Thunderbird Rd Ste 1-3",
            "address_purpose": "LOCATION",
            "city": "Phoenix",
            "state": "AZ",
            "postal_code": "850225306",
            "country_code": "US",
            "telephone_number": "602-230-7373",
            "fax_number": "602-218-6383",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "9741 N 90th Pl Ste 200",
            "address_purpose": "LOCATION",
            "city": "Scottsdale",
            "state": "AZ",
            "postal_code": "852585065",
            "country_code": "US",
            "telephone_number": "480-237-9776",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "GRAYDEN",
        "first_name": "THOMAS",
        "middle_name": "J",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-12-29",
        "last_updated": "2025-08-15",
        "certification_date": "2025-08-15",
        "deactivation_date": "2023-12-20",
        "reactivation_date": "2024-01-24",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2084P0800X",
            "taxonomy_group": "",
            "desc": "Psychiatry & Neurology, Psychiatry",
            "state": "AZ",
            "license": "67316",
            "primary": false
        },
        {
            "code": "2084P0800X",
            "taxonomy_group": "",
            "desc": "Psychiatry & Neurology, Psychiatry",
            "state": "CA",
            "license": "G50401",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Michael Anthony Grap
• Noah Douglas Grassie I
• Merry Ann Grasska, N.P.
• Derrick Vincent Grassmann
• Armond Jamell Larue Gray
• Lauren Alexis Greaves
• Grecian Chiropractic and Wellness
• Genevieve Greco
• Chanel Green, PA-C
• Jordan Green, OD

• Psychiatry Physician in Costa Mesa, CA
• Providers in Costa Mesa, CA by specialty
• Psychiatry Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 15, 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.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.