Dr. Regan H. Marsh, MD
- Medicare services, 2024
- 110
- Medicare patients, 2024
- 148
- Part D claims, 2024
- 11
- Hospital affiliations
- 4
- Medical groups
- 2
- Practice address
- 75 Francis Street, Boston, MA 02115
- Practice phone
- Call (617) 732-5500
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Marsh's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Regan H. Marsh is an emergency medicine physician in Boston, Massachusetts
Dr. Marsh practices at Brigham and Women's Hospital in Boston, Massachusetts, part of Mass General Brigham.
Dr. Marsh's NPI, 1740215730, was assigned on July 11, 2006. Dr. Marsh graduated from Perelman School of Med at the University of Pennsylvania in 2004. Dr. Marsh holds Massachusetts license 230033.
- NPI
- 1740215730NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9739225772
- NPI enumeration date
- July 11, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (617) 732-5500
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 48
- Medical school graduation
- 2004
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Regan H. Marsh practices at Brigham and Women's Hospital in Boston, Massachusetts
Dr. Marsh's primary practice is Brigham and Women's Hospital, at 75 Francis Street, Boston, MA 02115 in Suffolk County. The practice phone is (617) 732-5500.
- Brigham and Women's Hospital75 Francis Street, Boston, MA 02115 · Suffolk CountyPhone(617) 732-5500
Source: Dmand AI Affiliation Data
Dr. Regan H. Marsh is affiliated with 6 sites of care and 2 medical groups
Dr. Marsh's primary practice is Brigham and Women's Hospital in Boston, Massachusetts, part of Mass General Brigham. Dr. Marsh is also affiliated with Brigham and Women's Faulkner Hospital. The medical group on file is Brigham and Women's Hospital. Dmand AI also links Dr. Marsh to 2 more hospitals, 1 group practice or clinic, 1 hospital outpatient department and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Regan H. Marsh's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Marsh practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Brigham and Women's Hospital | Available with a free account |
| +5 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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Dr. Regan H. Marsh is one of 1,483 emergency medicine physicians in Massachusetts
Emergency medicine is Dr. Marsh's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Marsh is licensed in Massachusetts.
Specialties and state licenses
- Emergency medicine, MassachusettsPrimary
Emergency medicine physicians near Dr. Marsh
Counts of emergency medicine physicians with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Regan H. Marsh billed Medicare for 110 services in 2024
CMS data shows 110 Medicare services from Dr. Marsh across 2 procedure codes in 2024, for 148 Medicare patients. Medicare paid $14,108 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Marsh's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 692024: 11059%
Dr. Marsh compared with the Massachusetts median for emergency medicine physicians, 2024
- Dr. Marsh
- Massachusetts median
- Medicare services
- 110vs 34168% below
- Medicare patients
- 148vs 33756% below
Medians across 1,477 emergency medicine physicians in Massachusetts with Dmand AI profiles that report each measure.
Dr. Marsh's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Marsh?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Marsh and other emergency medicine physicians in Massachusetts.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Regan H. Marsh treated 148 Medicare patients in 2024, average age 74
CMS counts 148 Medicare patients who saw Dr. Marsh in 2024. The largest group is 75 to 84, with 48 patients. 75% of them have high blood pressure, and 68% have high cholesterol. 42% are also on Medicaid. Their average risk score is 2.25, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Marsh's median patient age at 60, with 54% women.
Dr. Marsh's Medicare patients by age, 2024
Dr. Marsh's Medicare patients by sex, 2024
- Women8658%
- Men6242%
Chronic conditions among Dr. Marsh's Medicare patients, 2024
- High blood pressure75%
- High cholesterol68%
- Arthritis54%
- Chronic kidney disease41%
- Diabetes41%
- Mood disorders38%
- Anxiety36%
- Ischemic heart disease36%
Share of Medicare patients with each condition. A patient can have several.
Dr. Marsh's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 60
Patient panel by sex, all payers
- Women54%
- Men45%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Regan H. Marsh wrote 11 Medicare Part D claims in 2024
In 2024, Dr. Marsh wrote 11 Medicare Part D claims.
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Regan H. Marsh takes part in Medicare
Dr. Marsh accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Regan H. Marsh graduated from Perelman School of Med at the University of Pennsylvania
Dr. Marsh graduated from Perelman School of Med at the University of Pennsylvania in 2004.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Regan H. Marsh's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Regan H. Marsh
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Regan H. Marsh's NPI number?
Dr. Regan H. Marsh's NPI number is 1740215730. It was assigned on July 11, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Regan H. Marsh?
Dr. Regan H. Marsh is an emergency medicine physician in Boston, Massachusetts. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Regan H. Marsh practice?
Dr. Marsh practices at 75 Francis Street, Boston, MA 02115. Dr. Marsh's primary practice is Brigham and Women's Hospital in Boston, Massachusetts, part of Mass General Brigham. Dmand AI also links Dr. Marsh to 2 hospitals, 1 group practice or clinic, 1 hospital outpatient department and 1 medical group.
What is Dr. Regan H. Marsh's office phone number?
The practice phone on file for Dr. Marsh is (617) 732-5500.
What is Dr. Regan H. Marsh's medical license number?
Dr. Marsh holds Massachusetts license 230033.
Which hospitals is Dr. Regan H. Marsh affiliated with?
Dr. Marsh practices at Brigham and Women's Hospital in Boston, Massachusetts. Dr. Marsh is also affiliated with Brigham and Women's Faulkner Hospital. Dmand AI links Dr. Marsh to 2 more hospitals.
What medical group is Dr. Regan H. Marsh part of?
Dr. Marsh is linked to Brigham and Women's Hospital. Dmand AI links Dr. Marsh to 1 more medical group.
Does Dr. Regan H. Marsh accept Medicare?
Yes. CMS data shows Dr. Marsh billed Medicare for 110 services in 2024, and Dr. Marsh accepts Medicare assignment.
How many Medicare patients does Dr. Regan H. Marsh see?
CMS counts 148 Medicare patients who saw Dr. Marsh in 2024, with an average age of 74.
What services does Dr. Regan H. Marsh bill to Medicare?
In 2024, Dr. Marsh's most billed Medicare services were emergency department visit (99285) and emergency department visit (99284).
Where did Dr. Regan H. Marsh go to medical school?
Dr. Marsh graduated from Perelman School of Med at the University of Pennsylvania in 2004.
How long has Dr. Regan H. Marsh been practicing?
Dr. Marsh graduated from medical school in 2004, 22 years ago.
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