Doctor profile · Federal record
Dr. Diane Tseng, MD,PHD
Medical Oncology Physician (CMS: Medical Oncology) · Internal Medicine Physician · Seattle, WA
- NPI 1164862785
- Accepts Medicare
- MIPS 87.0 / 100 · 2023
- 13 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
825 Eastlake Ave E
Seattle, WA 981094405
(206) 520-5000 - Mailing address
-
Po Box 50095
Seattle, WA 981455095
Credentials & registration
- NPI registered
- June 2013 — 13 yrs on file
- Profile last updated
- June 10, 2020
- Year of graduation
- 2013 — 13 yrs since
- Specialty taxonomy
- 207RX0202X — NUCC code
- State license (1)
- Washington #MD61038846
- Medicaid
- WA #1164862785
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1164862785. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
198
Distinct HCPCS
3
Medicare allowed
$27,721
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 111 | 51 | $152 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 67 | 40 | $105 | |
99205 |
New patient office or other outpatient visit, 60-74 minutes | 20 | 20 | $194 |
In context: peer comparison
Among 18 peers in Seattle Medical Oncology Physician, average services per provider: 51. This provider delivers 3.9× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
34
Patients
0
Total drug cost
$880
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Prochlorperazine Maleate | Generic | 22 | 0 | $491 |
| Ondansetron Hcl | Generic | 12 | 0 | $389 |
Hospital affiliations
Frequently asked questions
What is Dr. Diane Tseng's medical specialty?
Dr. Diane Tseng practices Medical Oncology Physician in Seattle, WA.
Where does Dr. Diane Tseng practice?
Dr. Diane Tseng practices at 825 Eastlake Ave E, Seattle, WA 981094405. Office phone: 2065205000.
What is Dr. Diane Tseng's NPI?
Dr. Diane Tseng's National Provider Identifier (NPI) is 1164862785, issued by NPPES.
Does Dr. Diane Tseng accept Medicare assignment?
Yes. Dr. Diane Tseng accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Diane Tseng commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99215); Established patient office or other outpatient visit (HCPCS 99214); New patient office or other outpatient visit (HCPCS 99205). Source: CMS Medicare Physician & Other Practitioners file.