Justin Tien, MD

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

A173600 Issued in CA

Practice address

505 Parnassus Ave
San Francisco, CA 94143-2204

Phone

(415) 476-1000

NPI assigned

Mar 19, 2018

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

Internal Medicine

Education

Other, 2018

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

University of California SFGH Medical GroupGroup PAC ID 5496668410, shared by 14 NPIs, 566 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Zuckerberg San Francisco General Hosp & Trauma Ctr Hospital, San Francisco, CA, CCN 050228

Merit-based Incentive Payment System (MIPS)

Final score

97.28 of 100Reported as group

Quality

89.92

Promoting interoperability

100

Improvement activities

40

Cost

78.23

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.

• Regents of the University of California

  • Internal Medicine Physician
  • San Francisco, CA
  • NPI 1760552343
  Medicare reassignment NPD
• UCSF Medical Group Business Services

  • Internal Medicine Physician
  • San Francisco, CA
  • NPI 1477624104
  Medicare reassignment NPD
• University of California San Francisco

  • Pediatrics Physician
  • San Francisco, CA
  • NPI 1861578973
  Medicare reassignment NPD
• University of California SFGH Medical Group

  • Otolaryngology Physician
  • San Francisco, CA
  • NPI 1154396208
  Medicare reassignment NPD
• University of California SFGH Medical Group

  • Cardiovascular Disease Physician
  • San Francisco, CA
  • NPI 1386619344
  Medicare reassignment NPD
• UCSF Medical Group Business Services

  • Health Service Clinic/Center
  • San Francisco, CA
  • NPI 1194115246
  NPD
• University of California San Francisco

  • Internal Medicine Physician
  • San Francisco, CA
  • NPI 1164512851
  NPD
• University of California San Francisco

  • Community/Retail Pharmacy
  • San Francisco, CA
  • NPI 1659141711
  NPD
• University of California SFGH Medical Group

  • Vascular Surgery Physician
  • San Francisco, CA
  • NPI 1033913959
  NPD
• University of California SFGH Medical Group

  • Internal Medicine Physician
  • San Francisco, CA
  • NPI 1306811930
  NPD
• University of California SFGH Medical Group

  • Addiction Medicine (Internal Medicine) Physician
  • San Francisco, CA
  • NPI 1629550660
  NPD
• Regents of the University of California

  • Rheumatology Physician
  • San Francisco, CA
  • NPI 1881763597
  NPD (past)

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

• City & County of San Francisco

  • General Acute Care Hospital
  • San Francisco, CA
  • NPI 1083648810
  Care Compare affiliation
• City & County of San Francisco

  • General Acute Care Hospital
  • San Francisco, CA
  • NPI 1164609962
  Care Compare affiliation

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

{
    "created_epoch": "1521417600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1758240000000",
    "number": "1609370345",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1001 POTRERO AVE",
            "city": "SAN FRANCISCO",
            "state": "CA",
            "postal_code": "941103518"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "505 PARNASSUS AVE",
            "city": "SAN FRANCISCO",
            "state": "CA",
            "postal_code": "941432204",
            "telephone_number": "415-476-1000"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "1001 Potrero Avenue, #0862",
            "address_purpose": "LOCATION",
            "city": "San Francisco",
            "state": "CA",
            "postal_code": "94110",
            "country_code": "US",
            "telephone_number": "415-514-9256",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "TIEN",
        "first_name": "JUSTIN",
        "credential": "MD",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2018-03-19",
        "last_updated": "2025-09-19",
        "certification_date": "2025-09-19",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "CA",
            "license": "A173600",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Irene Elena Tiedeman, RN
• Ivy Tiegel, LMFT, MA, MFA
• Kay Amanda Tiemann
• Cheryl Tien
• Emily Taylor Tien, LMFT
• Nenh Tien, RN
• Pamela G Tien, PHARM.D
• Phyllis Tien
• Susan I Chin Tien, M.D.
• Hannah Rose Tierney, MD, MPH

• Internal Medicine Physician in San Francisco, CA
• Providers in San Francisco, 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 Sep 19, 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.