Doctor profile · Federal record
Dr. Yunn-Yi Chen, MD
Anatomic Pathology & Clinical Pathology Physician (CMS: Pathology) · San Francisco, CA
- NPI 1841245966
- Accepts Medicare
- MIPS 70.8 / 100 · 2023
- 41 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
505 Parnassus Ave
San Francisco, CA 941432204
(415) 353-1102
fax (415) 353-1102 - Mailing address
-
1635 Divisadero Street, Suite 625, Box 1821
San Francisco, CA 941430001
Credentials & registration
- NPI registered
- May 2006 — 20 yrs on file
- Profile last updated
- June 5, 2008
- Year of graduation
- 1985 — 41 yrs since
- Specialty taxonomy
- 207ZP0102X — NUCC code
- State license (1)
- California #A65410
- Medicaid
- CA #00A654100
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1841245966. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
790
Distinct HCPCS
10
Medicare allowed
$40,160
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
88360 |
Microscopic genetic analysis of tumor, manual | 205 | 56 | $47 | |
88305 |
Pathology examination of tissue using a microscope, intermediate complexity | 175 | 93 | $42 | |
88307 |
Pathology examination of tissue using a microscope, moderately high complexity | 133 | 37 | $94 | |
88341 |
Special stained specimen slides to examine tissue, each additional procedure | 110 | 36 | $32 | |
88342 |
Special stained specimen slides to examine tissue, initial procedure | 64 | 50 | $39 | |
76098 |
X-ray of surgical specimen | 36 | 32 | $17 | |
88321 |
Surgical pathology consultation and report on referred slides prepared elsewhere | 18 | 18 | $95 | |
88323 |
Surgical pathology consultation and report on referred material requiring preparation of slides | 18 | 17 | $99 | |
88363 |
Examination of archival tissue for genetic analysis | 17 | 16 | $22 | |
88302 |
Pathology examination of tissue using a microscope | 14 | 12 | $8 |
In context: peer comparison
Among 13 peers in San Francisco Anatomic Pathology & Clinical Pathology Physician, average services per provider: 110. This provider delivers 7.2× the peer median.Open Payments
Industry payments received
All-time total
$31
Transactions
1
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| AstraZeneca Pharmaceuticals Lp | 1 | $31.13 |
By nature of payment
Hospital affiliations
Frequently asked questions
What is Dr. Yunn-Yi Chen's medical specialty?
Dr. Yunn-Yi Chen practices Anatomic Pathology & Clinical Pathology Physician in San Francisco, CA.
Where does Dr. Yunn-Yi Chen practice?
Dr. Yunn-Yi Chen practices at 505 Parnassus Ave, San Francisco, CA 941432204. Office phone: 4153531102.
What is Dr. Yunn-Yi Chen's NPI?
Dr. Yunn-Yi Chen's National Provider Identifier (NPI) is 1841245966, issued by NPPES.
Does Dr. Yunn-Yi Chen accept Medicare assignment?
Yes. Dr. Yunn-Yi Chen accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Yunn-Yi Chen commonly perform?
Top Medicare-reported procedures in 2023: Microscopic genetic analysis of tumor, manual (HCPCS 88360); Pathology examination of tissue using a microscope, intermediate complexity (HCPCS 88305); Pathology examination of tissue using a microscope, moderately high complexity (HCPCS 88307). Source: CMS Medicare Physician & Other Practitioners file.