Doctor profile · Federal record
Dr. Warren Chow, MD
Hematology & Oncology Physician (CMS: Medical Oncology) · Internal Medicine Physician · Medical Oncology Physician · Orange, CA
- NPI 1093822017
- Accepts Medicare
- MIPS 91.2 / 100 · 2023
- 40 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
101 the City Dr S
Orange, CA 928683201
(714) 456-5153
fax (714) 456-5280 - Mailing address
-
200 S Manchester Ave Ste 300
Orange, CA 928683219
Credentials & registration
- NPI registered
- August 2006 — 20 yrs on file
- Profile last updated
- March 25, 2025
- Year of graduation
- 1986 — 40 yrs since
- Specialty taxonomy
- 207RH0003X — NUCC code
- State license (1)
- California #G61354
- Medicaid
- CA #00G613540
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1093822017. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
386
Distinct HCPCS
5
Medicare allowed
$41,626
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 277 | 90 | $104 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 41 | 32 | $71 | |
99205 |
New patient office or other outpatient visit, 60-74 minutes | 36 | 36 | $194 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 16 | 11 | $139 | |
99441 |
Telephone medical discussion with physician, 5-10 minutes | 16 | 13 | $38 |
In context: peer comparison
Among 20 peers in this city , average services per provider: 1,067. This provider delivers 0.4× the peer median.Open Payments
Industry payments received
All-time total
$457
Transactions
4
Manufacturers
3
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Inari Medical, Inc. | 1 | $232.63 | |
| Balt USA, LLC | 2 | $209.24 | |
| Abbott Laboratories | 1 | $15.41 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
127
Patients
0
Total drug cost
$150,562
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Imatinib Mesylate | Generic | 32 | 0 | $150,035 |
| Dexamethasone | Generic | 28 | 0 | $172 |
| Olanzapine | Generic | 28 | 0 | $101 |
| Prochlorperazine Maleate | Generic | 15 | 0 | $135 |
| Prednisone | Generic | 13 | 0 | $65 |
| Ondansetron Hcl | Generic | 11 | 0 | $54 |
Frequently asked questions
What is Dr. Warren Chow's medical specialty?
Dr. Warren Chow practices Hematology & Oncology Physician in Orange, CA.
Where does Dr. Warren Chow practice?
Dr. Warren Chow practices at 101 the City Dr S, Orange, CA 928683201. Office phone: 7144565153.
What is Dr. Warren Chow's NPI?
Dr. Warren Chow's National Provider Identifier (NPI) is 1093822017, issued by NPPES.
Does Dr. Warren Chow accept Medicare assignment?
Yes. Dr. Warren Chow accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Warren Chow commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Established patient office or other outpatient visit (HCPCS 99213); New patient office or other outpatient visit (HCPCS 99205). Source: CMS Medicare Physician & Other Practitioners file.