Mitchell Mark Nass, O.D.

Primary specialty

OptometristTaxonomy code 152W00000X

License

35433 Issued in CA

Practice address

Corner of Route N12 and N7
Fort Defiance, AZ 86504-0649

Phone

(928) 729-8000

NPI assigned

Dec 11, 2006

Sex

Male

Sole proprietor

Yes

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, TX2 enrollments

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: No
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 2

Specialty

Optometry

Education

Pennsylvania College of Optometry, 1982

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

The Fort Defiance Indian Hospital Board, IncorporationGroup PAC ID 0941336697, 153 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Fort Defiance Indian Hospital Hospital, Ft. Defiance, AZ, CCN 030071

Medicare enrollment (NPD)

Enrolled

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: mitchell.nass.p4@direct.vht.nextgenshare.com

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.

• The Fort Defiance Indian Hospital Board, Incorporation

  • General Acute Care Hospital
  • Fort Defiance, AZ
  • NPI 1477876639

  TX

  Medicare reassignment Care Compare group NPD
• Golden Valley Health Centers

  • Federally Qualified Health Center (FQHC)
  • Turlock, CA
  • NPI 1356445753
  Medicare reassignment NPD
• Total Vision PC

  • Optometrist
  • San Diego, CA
  • NPI 1356813711
  Medicare reassignment NPD
• Golden Valley Health Center

  • Federally Qualified Health Center (FQHC)
  • Westley, CA
  • NPI 1770568347
  NPD
• Golden Valley Health Centers

  • Community/Retail Pharmacy
  • Merced, CA
  • NPI 1093817405
  NPD
• Golden Valley Health Center

  • Federally Qualified Health Center (FQHC)
  • Modesto, CA
  • NPI 1487867503
  NPD (past)
• Marina Eyecare Center

  • Optometrist
  • Los Angeles, CA
  • NPI 1407917701
  NPD (past)
• Mark a. Chung, O.D., a Professional Corporation

  • Optometrist
  • West Hollywood, CA
  • NPI 1861800997
  NPD (past)
• Seal Beach Eyes Optometry Inc

  • Optometrist
  • Seal Beach, CA
  • NPI 1124171566
  NPD (past)

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

{
    "created_epoch": "1165795200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1771372800000",
    "number": "1609936558",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 649",
            "city": "FORT DEFIANCE",
            "state": "AZ",
            "postal_code": "865040649",
            "telephone_number": "928-729-8000"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "CORNER OF ROUTE N12 AND N7",
            "city": "FORT DEFIANCE",
            "state": "AZ",
            "postal_code": "865040649",
            "telephone_number": "928-729-8000"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "NASS",
        "first_name": "MITCHELL",
        "middle_name": "MARK",
        "name_prefix": "Dr.",
        "credential": "O.D.",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2006-12-11",
        "last_updated": "2026-02-18",
        "certification_date": "2026-02-18",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "152W00000X",
            "taxonomy_group": "",
            "desc": "Optometrist",
            "state": "CA",
            "license": "35433",
            "primary": true
        },
        {
            "code": "152W00000X",
            "taxonomy_group": "",
            "desc": "Optometrist",
            "state": "FL",
            "license": "OPC1771",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Patricia Nadurak
• Sharita Nagaraj, M.D.
• Junko Nakai, MD
• Andrew Napolitano
• Gustavo Naranjo
• Jessica Layne Nelson, PHARMD
• New Emergence, Incorporated
• Yolanda P Nez, PHARMD
• Kuong Ngann, DO
• Uykok Ngo, PHARMACIST

• Optometrist in Fort Defiance, AZ
• Providers in Fort Defiance, AZ by specialty
• Optometrist in Arizona

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Feb 18, 2026; 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.