Doctor profile · Federal record
Dr. Yiann Chen, MD
Nephrology Physician (CMS: Nephrology) · Oakland, CA
- NPI 1891912689
- Accepts Medicare
- 24 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
275 W Macarthur Blvd
Oakland, CA 946115641
(510) 752-1000
Credentials & registration
- NPI registered
- April 2007 — 19 yrs on file
- Profile last updated
- December 9, 2021
- Year of graduation
- 2002 — 24 yrs since
- Specialty taxonomy
- 207RN0300X — NUCC code
- State license (1)
- California #A100448
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1891912689. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
133
Distinct HCPCS
2
Medicare allowed
$12,497
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 119 | 34 | $88 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 14 | 12 | $144 |
In context: peer comparison
Among 6 peers in Oakland Nephrology Physician, average services per provider: 129. This provider delivers 1.0× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
331
Patients
122
Total drug cost
$38,657
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Losartan Potassium | Generic | 62 | 31 | $854 |
| Amlodipine Besylate | Generic | 52 | 29 | $628 |
| Sevelamer Carbonate | Generic | 42 | 24 | $17,716 |
| Calcium Acetate | Generic | 39 | 22 | $6,180 |
| Furosemide | Generic | 35 | 16 | $760 |
| Gentamicin Sulfate | Generic | 27 | 0 | $1,164 |
| Metoprolol Tartrate | Generic | 18 | 0 | $175 |
| Jardiance (Empagliflozin) | Brand | 16 | 0 | $10,463 |
| Atorvastatin Calcium | Generic | 15 | 0 | $175 |
| Hydralazine Hcl | Generic | 13 | 0 | $433 |
Frequently asked questions
What is Dr. Yiann Chen's medical specialty?
Dr. Yiann Chen practices Nephrology Physician in Oakland, CA.
Where does Dr. Yiann Chen practice?
Dr. Yiann Chen practices at 275 W Macarthur Blvd, Oakland, CA 946115641. Office phone: 5107521000.
What is Dr. Yiann Chen's NPI?
Dr. Yiann Chen's National Provider Identifier (NPI) is 1891912689, issued by NPPES.
Does Dr. Yiann Chen accept Medicare assignment?
Yes. Dr. Yiann Chen accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Yiann Chen commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232); Initial hospital care with straightforward or low-level medical decision making (HCPCS 99222). Source: CMS Medicare Physician & Other Practitioners file.