Doctor profile · Federal record
Dr. Justin Tien, MD
Internal Medicine Physician (CMS: Internal Medicine) · San Francisco, CA
- NPI 1609370345
- Accepts Medicare
- MIPS 85.5 / 100 · 2023
- 8 yrs in practice
- Male
- Solo practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
505 Parnassus Ave
San Francisco, CA 941432204
(415) 476-1000 - Additional location
-
1001 Potrero Avenue, #0862
San Francisco, CA 94110
(415) 514-9256 - Mailing address
-
1001 Potrero Ave
San Francisco, CA 941103518
Credentials & registration
- NPI registered
- March 2018 — 8 yrs on file
- Profile last updated
- September 19, 2025
- Year of graduation
- 2018 — 8 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- California #A173600
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1609370345. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
135
Distinct HCPCS
4
Medicare allowed
$21,468
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 57 | 56 | $193 | |
99233 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 44 | 19 | $132 | |
99239 |
Hospital discharge day management, more than 30 minutes | 18 | 17 | $129 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 16 | 16 | $144 |
In context: peer comparison
Among 236 peers in this city , average services per provider: 93. This provider delivers 1.5× the peer median.Hospital affiliations
Frequently asked questions
What is Dr. Justin Tien's medical specialty?
Dr. Justin Tien practices Internal Medicine Physician in San Francisco, CA.
Where does Dr. Justin Tien practice?
Dr. Justin Tien practices at 505 Parnassus Ave, San Francisco, CA 941432204. Office phone: 4154761000.
What is Dr. Justin Tien's NPI?
Dr. Justin Tien's National Provider Identifier (NPI) is 1609370345, issued by NPPES.
Does Dr. Justin Tien accept Medicare assignment?
Yes. Dr. Justin Tien accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Justin Tien commonly perform?
Top Medicare-reported procedures in 2023: Initial hospital care with moderate level of medical decision making (HCPCS 99223); Subsequent hospital care with moderate levelof medical decision making (HCPCS 99233); Hospital discharge day management (HCPCS 99239). Source: CMS Medicare Physician & Other Practitioners file.