Doctor profile · Federal record
Dr. Lillian Tseng, M.D.
Internal Medicine Physician (CMS: Internal Medicine) · Walnut Creek, CA
- NPI 1619016169
- Accepts Medicare
- 22 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
1515 Newell Ave
Walnut Creek, CA 945965120
(925) 295-4000
Credentials & registration
- NPI registered
- February 2007 — 19 yrs on file
- Profile last updated
- December 13, 2021
- Year of graduation
- 2004 — 22 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- California #A92629
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1619016169. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
53
Distinct HCPCS
1
Medicare allowed
$4,666
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 53 | 17 | $88 |
In context: peer comparison
Among 44 peers in Walnut Creek Internal Medicine Physician, average services per provider: 260. This provider delivers 0.2× the peer median.Frequently asked questions
What is Dr. Lillian Tseng's medical specialty?
Dr. Lillian Tseng practices Internal Medicine Physician in Walnut Creek, CA.
Where does Dr. Lillian Tseng practice?
Dr. Lillian Tseng practices at 1515 Newell Ave, Walnut Creek, CA 945965120. Office phone: 9252954000.
What is Dr. Lillian Tseng's NPI?
Dr. Lillian Tseng's National Provider Identifier (NPI) is 1619016169, issued by NPPES.
Does Dr. Lillian Tseng accept Medicare assignment?
Yes. Dr. Lillian Tseng accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Lillian Tseng commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232). Source: CMS Medicare Physician & Other Practitioners file.