Byung Don Ahn, MD

Primary specialty

Cardiovascular Disease PhysicianTaxonomy code 207RC0000X

License

A39266 Issued in CA

Practice address

685 N 13TH Ave Ste 1
Upland, CA 91786-4963

Phone

(909) 500-8683

NPI assigned

Oct 21, 2005

Last updated

Mar 25, 2026By the provider in NPPES

Sex

Male

Sole proprietor

Yes

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

Specialty

Cardiovascular Disease (Cardiology)Also: Internal Medicine

Education

Other, 1978

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

Prohealth Partners, a Medical GroupGroup PAC ID 2769388412, 236 clinicians

United Heart InstituteGroup PAC ID 2860908084, 5 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• San Antonio Regional Hospital Hospital, Upland, CA, CCN 050099
• City of Hope Helford Clinical Research Hospital Hospital, Duarte, CA, CCN 050146

Procedures performed for Medicare patients

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

Practice roles

Locations

Networks

• BSC 65 PLUS INDIVIDUAL MAPD

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

• Prohealth Partners, a Medical Group

  • Internal Medicine Physician
  • Lakewood, CA
  • NPI 1003949975

  Cardiovascular Disease

  Medicare reassignment Care Compare group NPD
• United Heart Institute

  • Cardiovascular Disease Physician
  • Upland, CA
  • NPI 1871394791
  Medicare reassignment Care Compare group NPD
• B Don Ahn MD Inc

  dba Inland Cardiology Medical Associates

  • Cardiovascular Disease Physician
  • Upland, CA
  • NPI 1942366992
  NPD (past) Authorized official
• Modern Nuclear, Inc.

  • Nuclear Medicine Technology Radiologic Technologist
  • La Habra, CA
  • NPI 1659394047
  NPD
• Prohealth Partners a Medical Group Inc

  • Cardiovascular Disease Physician
  • Chino, CA
  • NPI 1326700626
  NPD
• Prohealth Partners, a Medical Group, Inc.

  • Internal Medicine Physician
  • Pico Rivera, CA
  • NPI 1912899394
  NPD
• Cardiac Imaging Inc

  • Mobile Radiology Clinic/Center
  • Oakbrook Terrace, IL
  • NPI 1770830606
  NPD

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

• City of Hope National Medical Center

  • General Acute Care Hospital
  • Duarte, CA
  • NPI 1750358297
  Care Compare affiliation
• San Antonio Regional Hospital

  • General Acute Care Hospital
  • Upland, CA
  • NPI 1780681189
  Care Compare affiliation

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

{
    "created_epoch": "1129852800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1774396800000",
    "number": "1194715193",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1382 E FOOTHILL BLVD",
            "city": "UPLAND",
            "state": "CA",
            "postal_code": "917864014",
            "telephone_number": "909-982-6500",
            "fax_number": "909-920-0406"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "685 N 13TH AVE STE 1",
            "city": "UPLAND",
            "state": "CA",
            "postal_code": "917864963",
            "telephone_number": "909-500-8683"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "1382 E Foothill Blvd",
            "address_purpose": "LOCATION",
            "city": "Upland",
            "state": "CA",
            "postal_code": "917864014",
            "country_code": "US",
            "telephone_number": "909-982-6500",
            "fax_number": "909-920-0406",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "AHN",
        "first_name": "BYUNG",
        "middle_name": "DON",
        "credential": "MD",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2005-10-21",
        "last_updated": "2026-03-25",
        "certification_date": "2026-03-25",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RC0000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Cardiovascular Disease",
            "state": "CA",
            "license": "A39266",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Elenor Aguilar, DDS
• Johanna Aguirre Salazar
• Marisol Aguirre
• Farhana Ahmed
• Obaid Ahmed
• AIDS Healthcare Foundation (AHF Pharmacy)
• Aim Learning Inc (Fit Learning)
• Akachi Azubuike MD a Professional Corporation
• James S Akamine, M.D.
• Owen Akenzua, LCSW

• Cardiovascular Disease Physician in Upland, CA
• Providers in Upland, CA by specialty
• Cardiovascular Disease Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Mar 25, 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.