Mon-Ta Tsai, M.D.

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

A65382 Issued in CA

Practice address

25982 Pala
Suite 250
Mission Viejo, CA 92691-6719

Phone

(949) 588-0051

Fax

(949) 588-0052

NPI assigned

Mar 31, 2006

Sex

Male

Sole proprietor

No

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

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

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

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.

• Mission Hills Medical Group, Inc.

  • Internal Medicine Physician
  • Mission Viejo, CA
  • NPI 1225093305
  Medicare reassignment NPD Authorized official
• Pacific Private Practice Network Inc

  • Pulmonary Disease Physician
  • San Juan Capistrano, CA
  • NPI 1033501077

  Internal Medicine

  Medicare reassignment NPD
• Paloma Medical Group Inc

  • Specialist
  • San Juan Capistrano, CA
  • NPI 1346331725

  Internal Medicine

  NPD
• Advanced Hospitalist Medical Group, Inc.

  • Emergency Medicine Physician
  • Mission Viejo, CA
  • NPI 1841240967
  NPD (past)
• MD Solutions Medical Corp

  • Dermatology Physician
  • Sherman Oaks, CA
  • NPI 1902837735
  NPD (past)

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

{
    "created_epoch": "1143763200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1427019231",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "25982 PALA",
            "address_2": "SUITE 250",
            "city": "MISSION VIEJO",
            "state": "CA",
            "postal_code": "926916719",
            "telephone_number": "949-588-0051",
            "fax_number": "949-588-0052"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "25982 PALA",
            "address_2": "SUITE 250",
            "city": "MISSION VIEJO",
            "state": "CA",
            "postal_code": "926916719",
            "telephone_number": "949-588-0051",
            "fax_number": "949-588-0052"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "TSAI",
        "first_name": "MON-TA",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-03-31",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "CA",
            "license": "A65382",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Andrew Thuc Truong, MD
• Kim Phung Truong, D.O.
• Michael PM Truong, M.D.
• Tiffany Thi Mong Truong, PHARMD
• Connie Sauwen Tsai, O.D.
• Asterios Tsimpas, M.D.
• Sofia Tuc
• Aaron Tucker
• Breanna Lynnae Tucker, LCSW
• Tami Loree Tucker, PHD

• Internal Medicine Physician in Mission Viejo, CA
• Providers in Mission Viejo, CA by specialty
• Internal Medicine Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 13, 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.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.