Doctor profile · Federal record
Dr. Gigi Chen, M.D.
Hematology & Oncology Physician (CMS: Hematology/Oncology) · Pleasant Hill, CA
- NPI 1821073636
- Accepts Medicare
- MIPS 85.7 / 100 · 2023
- 24 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
400 Taylor Blvd, Suite 202
Pleasant Hill, CA 945232147
(925) 677-5041
fax (925) 677-5025 - Mailing address
-
1450 Treat Blvd # 300
Walnut Creek, CA 945972168
Credentials & registration
- NPI registered
- December 2005 — 21 yrs on file
- Profile last updated
- August 2, 2021
- Year of graduation
- 2002 — 24 yrs since
- Specialty taxonomy
- 207RH0003X — NUCC code
- State license (1)
- California #A84387
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1821073636. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
104,768
Distinct HCPCS
10
Medicare allowed
$2,764,245
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
J9271 |
Injection, pembrolizumab, 1 mg | 33,000 | 22 | $54 | |
J1453 |
Injection, fosaprepitant, 1 mg | 23,250 | 28 | $0 | |
J1439 |
Injection, ferric carboxymaltose, 1 mg | 16,330 | 13 | $1 | |
J0897 |
Injection, denosumab, 1 mg | 9,421 | 66 | $23 | |
J0885 |
Injection, epoetin alfa, (for non-esrd use), 1000 units | 7,720 | 41 | $7 | |
J1100 |
Injection, dexamethasone sodium phosphate, 1 mg | 2,496 | 49 | $0 | |
J2469 |
Injection, palonosetron hcl, 25 mcg | 1,930 | 38 | $1 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 1,315 | 557 | $149 | |
36415 |
Insertion of needle into vein for collection of blood sample | 975 | 228 | $8 | |
85025 |
Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count | 944 | 231 | $8 |
In context: peer comparison
Among 2 peers in Pleasant Hill Hematology & Oncology Physician, average services per provider: 1,799. This provider delivers 58× the peer median.Open Payments
Industry payments received
All-time total
$4,528
Transactions
45
Manufacturers
15
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Kite Pharma, INC. | 1 | $2,080.00 | |
| E.R. Squibb & Sons, L.L.C. | 6 | $960.98 | |
| Abbvie INC. | 6 | $203.42 | |
| Celgene Corporation | 5 | $162.66 | |
| Pfizer INC. | 6 | $160.87 | |
| Novartis Pharmaceuticals Corporation | 5 | $115.29 | |
| Janssen Biotech, INC. | 4 | $104.70 | |
| Adc Therapeutics America, INC. | 1 | $101.53 | |
| Merck Sharp & Dohme LLC | 3 | $85.44 | |
| GlaxoSmithKline, LLC. | 1 | $64.50 | |
| Genzyme Corporation | 2 | $48.70 | |
| Daiichi Sankyo INC. | 2 | $34.96 | |
| Ipsen Biopharmaceuticals, INC | 1 | $33.27 | |
| Immunocore Limited | 1 | $32.30 | |
| Genentech USA, INC. | 1 | $30.31 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
258
Patients
51
Total drug cost
$262,895
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Gabapentin | Generic | 45 | 15 | $899 |
| Eliquis (Apixaban) | Brand | 39 | 13 | $40,057 |
| Letrozole | Generic | 25 | 0 | $739 |
| Levothyroxine Sodium | Generic | 25 | 0 | $246 |
| Anastrozole | Generic | 23 | 12 | $737 |
| Xarelto (Rivaroxaban) | Brand | 23 | 11 | $29,618 |
| Hydroxyurea | Generic | 21 | 0 | $700 |
| Lisinopril | Generic | 12 | 0 | $80 |
| Warfarin Sodium | Generic | 12 | 0 | $456 |
| Ondansetron Hcl | Generic | 11 | 0 | $153 |
Hospital affiliations
Frequently asked questions
What is Dr. Gigi Chen's medical specialty?
Dr. Gigi Chen practices Hematology & Oncology Physician in Pleasant Hill, CA.
Where does Dr. Gigi Chen practice?
Dr. Gigi Chen practices at 400 Taylor Blvd, Pleasant Hill, CA 945232147. Office phone: 9256775041.
What is Dr. Gigi Chen's NPI?
Dr. Gigi Chen's National Provider Identifier (NPI) is 1821073636, issued by NPPES.
Does Dr. Gigi Chen accept Medicare assignment?
Yes. Dr. Gigi Chen accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Gigi Chen commonly perform?
Top Medicare-reported procedures in 2023: Injection, pembrolizumab, 1 mg (HCPCS J9271); Injection, fosaprepitant, 1 mg (HCPCS J1453); Injection, ferric carboxymaltose, 1 mg (HCPCS J1439). Source: CMS Medicare Physician & Other Practitioners file.