Doctor profile · Federal record
Dr. Gretchen Gignac, MD
Medical Oncology Physician (CMS: Hematology/Oncology) · Internal Medicine Physician · Hematology & Oncology Physician · Boston, MA
- NPI 1821288960
- Accepts Medicare
- 25 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
830 Harrison Avenue, Moakley, 3Rd Floor
Boston, MA 021182905
(617) 638-6428
fax (617) 638-5756 - Mailing address
-
720 Harrison Avenue, Dob 503
Boston, MA 02118
Credentials & registration
- NPI registered
- July 2007 — 19 yrs on file
- Profile last updated
- June 5, 2014
- Year of graduation
- 2001 — 25 yrs since
- Specialty taxonomy
- 207RX0202X — NUCC code
- State license (1)
- Massachusetts #232079
- Medicaid
- MA #110077244A
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1821288960. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
340
Distinct HCPCS
6
Medicare allowed
$38,747
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 150 | 88 | $103 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 78 | 47 | $152 | |
99233 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 53 | 17 | $124 | |
G2212 |
Prolonged office or other outpatient evaluation and management service(s) beyond the maximum required time of the primary procedure which has been selected using total time on the date of the primary service; each additional 15 minutes by the physician or | 29 | 12 | $33 | |
99205 |
New patient office or other outpatient visit, 60-74 minutes | 16 | 16 | $183 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 14 | 14 | $69 |
In context: peer comparison
Among 103 peers in this city , average services per provider: 67. This provider delivers 5.1× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
638
Patients
75
Total drug cost
$2,668,879
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Orgovyx (Relugolix) | Brand | 199 | 34 | $539,631 |
| Nubeqa (Darolutamide) | Brand | 99 | 22 | $1,192,012 |
| Bicalutamide | Generic | 65 | 19 | $1,356 |
| Abiraterone Acetate | Generic | 47 | 0 | $153,430 |
| Tamsulosin Hcl | Generic | 45 | 0 | $371 |
| Prednisone | Generic | 43 | 0 | $180 |
| Xtandi (Enzalutamide) | Brand | 35 | 0 | $403,109 |
| Erleada (Apalutamide) | Brand | 26 | 0 | $367,585 |
| Dexamethasone | Generic | 21 | 0 | $97 |
| Eliquis (Apixaban) | Brand | 20 | 0 | $10,612 |
Hospital affiliations
Frequently asked questions
What is Dr. Gretchen Gignac's medical specialty?
Dr. Gretchen Gignac practices Medical Oncology Physician in Boston, MA.
Where does Dr. Gretchen Gignac practice?
Dr. Gretchen Gignac practices at 830 Harrison Avenue, Boston, MA 021182905. Office phone: 6176386428.
What is Dr. Gretchen Gignac's NPI?
Dr. Gretchen Gignac's National Provider Identifier (NPI) is 1821288960, issued by NPPES.
Does Dr. Gretchen Gignac accept Medicare assignment?
Yes. Dr. Gretchen Gignac accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Gretchen Gignac 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 99215); Subsequent hospital care with moderate levelof medical decision making (HCPCS 99233). Source: CMS Medicare Physician & Other Practitioners file.