Doctor profile · Federal record
Dr. Regan Marsh, M.D.
Emergency Medicine Physician (CMS: Emergency Medicine) · Boston, MA
- NPI 1740215730
- Accepts Medicare
- 22 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
Brigham and Women's Hospital, 75 Francis St/Emergency Medicine
Boston, MA 02115
(617) 732-8070 - Additional location
-
Corner of Route N12 and N7
Fort Defiance, AZ 865040649
(928) 729-8000 - Mailing address
-
16 Woodholm RD
Manchester by the Sea, MA 019441042
Credentials & registration
- NPI registered
- July 2006 — 20 yrs on file
- Profile last updated
- March 14, 2025
- Year of graduation
- 2004 — 22 yrs since
- Specialty taxonomy
- 207P00000X — NUCC code
- State license (1)
- Massachusetts #230033
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1740215730. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
69
Distinct HCPCS
3
Medicare allowed
$11,908
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99285 |
Emergency department visit with high level of medical decision making | 45 | 44 | $183 | |
99284 |
Emergency department visit with moderate level of medical decision making | 13 | 13 | $125 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 11 | 11 | $184 |
In context: peer comparison
Among 183 peers in Boston Emergency Medicine Physician, average services per provider: 65. This provider delivers 1.1× the peer median.Hospital affiliations
Frequently asked questions
What is Dr. Regan Marsh's medical specialty?
Dr. Regan Marsh practices Emergency Medicine Physician in Boston, MA.
Where does Dr. Regan Marsh practice?
Dr. Regan Marsh practices at Brigham and Women's Hospital, Boston, MA 02115. Office phone: 6177328070.
What is Dr. Regan Marsh's NPI?
Dr. Regan Marsh's National Provider Identifier (NPI) is 1740215730, issued by NPPES.
Does Dr. Regan Marsh accept Medicare assignment?
Yes. Dr. Regan Marsh accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Regan Marsh 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); Initial hospital care with moderate level of medical decision making (HCPCS 99223). Source: CMS Medicare Physician & Other Practitioners file.