Doctor profile · Federal record
Dr. Derek Barclay, M.D.
Medical Toxicology (Emergency Medicine) Physician · Boston, MA
- NPI 1801820659
- 20 yrs on file
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
Brigham and Women's Hospital, 75 Francis Street, Neville House
Boston, MA 02115
(617) 732-5656 - Mailing address
-
20 Norris St, Apartment #2
Cambridge, MA 021401815
Credentials & registration
- NPI registered
- July 2006 — 20 yrs on file
- Profile last updated
- July 8, 2007
- Specialty taxonomy
- 207PT0002X — NUCC code
- State license (1)
- Massachusetts #226628
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1801820659. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
430
Distinct HCPCS
4
Medicare allowed
$70,906
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99285 |
Emergency department visit with high level of medical decision making | 231 | 229 | $185 | |
99284 |
Emergency department visit with moderate level of medical decision making | 113 | 113 | $127 | |
99291 |
Critical care, first 30-74 minutes | 50 | 50 | $222 | |
99283 |
Emergency department visit with low level of medical decision making | 36 | 36 | $76 |
In context: peer comparison
Among 2 peers in Boston Medical Toxicology (Emergency Medicine) Physician, average services per provider: 131. This provider delivers 3.3× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
85
Patients
83
Total drug cost
$464
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Cephalexin | Generic | 28 | 27 | $278 |
| Prednisone | Generic | 25 | 25 | $63 |
| Oxycodone-Acetaminophen (Oxycodone Hcl/Acetaminophen) | Brand | 20 | 20 | $99 |
| Clonidine Hcl | Generic | 12 | 11 | $23 |
Frequently asked questions
What is Dr. Derek Barclay's medical specialty?
Dr. Derek Barclay practices Medical Toxicology (Emergency Medicine) Physician in Boston, MA.
Where does Dr. Derek Barclay practice?
Dr. Derek Barclay practices at Brigham and Women's Hospital, Boston, MA 02115. Office phone: 6177325656.
What is Dr. Derek Barclay's NPI?
Dr. Derek Barclay's National Provider Identifier (NPI) is 1801820659, issued by NPPES.
What procedures does Dr. Derek Barclay commonly perform?
Top Medicare-reported procedures in 2023: Emergency department visit with high level of medical decision making (HCPCS 99285); Emergency department visit with moderate level of medical decision making (HCPCS 99284); Critical care (HCPCS 99291). Source: CMS Medicare Physician & Other Practitioners file.