Dr. Ronald William Mercer, MD
- Medicare services, 2024
- 3,929
- Medicare patients, 2024
- 3,326
- Hospital affiliations
- 5
- Industry payments
- $16,874
- Medical groups
- 4
- Practice address
- 55 Fruit Street, Boston, MA 02114
- Practice phone
- Call (617) 726-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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Dr. Ronald William Mercer is a diagnostic radiologist in Boston, Massachusetts
Dr. Mercer practices at Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham.
Dr. Mercer's NPI, 1437543766, was assigned on March 25, 2015. Dr. Mercer holds Massachusetts license 270973.
- NPI
- 1437543766NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4587095336
- NPI enumeration date
- March 25, 2015
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (617) 726-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 37
- Medical school graduation
- 2015
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Ronald William Mercer practices at Massachusetts General Hospital in Boston, Massachusetts
Dr. Mercer's primary practice is Massachusetts General Hospital, at 55 Fruit Street, Boston, MA 02114 in Suffolk County. The practice phone is (617) 726-2000.
- Massachusetts General Hospital55 Fruit Street, Boston, MA 02114 · Suffolk CountyPhone(617) 726-2000
Source: Dmand AI Affiliation Data
Dr. Ronald William Mercer is affiliated with 6 sites of care and 4 medical groups
Dr. Mercer's primary practice is Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham. Dr. Mercer is also affiliated with Brigham and Women's Hospital. The medical group on file is Massachusetts General Physicians Organization (MGPO). Dmand AI also links Dr. Mercer to 3 more hospitals, 3 medical groups and 1 community health center, 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. Ronald William Mercer's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Mercer practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Massachusetts General Hospital | Available with a free account |
| +5 more sites and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Ronald William Mercer is one of 1,246 diagnostic radiologists in Massachusetts
Diagnostic radiology is Dr. Mercer's primary specialty in the NPI Registry, under taxonomy code 2085R0202X. Dr. Mercer is licensed in Massachusetts.
Specialties and state licenses
- Diagnostic radiology, MassachusettsPrimary
Diagnostic radiologists near Dr. Mercer
Counts of diagnostic radiologists 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. Ronald William Mercer billed Medicare for 3,929 services in 2024
CMS data shows 3,929 Medicare services from Dr. Mercer across 52 procedure codes in 2024, for 3,326 Medicare patients. Medicare paid $71,814 for them.
Dr. Mercer's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Imaging
- 2023: 3,7702024: 3,8713%
- Surgery
- 2023: 522024: 5812%
- Other services
- 2023: 4,8802024: 0100%
Where Dr. Mercer's Medicare services took place, 2024
- In an office1,21731%
- In a facility2,71269%
Dr. Mercer compared with the Massachusetts median for diagnostic radiologists, 2024
- Dr. Mercer
- Massachusetts median
- Medicare services
- 3,929vs 2,24275% above
- Medicare patients
- 3,326vs 1,5712.1 times
Medians across 1,108 diagnostic radiologists in Massachusetts with Dmand AI profiles that report each measure.
Dr. Mercer'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. Mercer?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Mercer and other diagnostic radiologists in Massachusetts.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Ronald William Mercer treated 3,326 Medicare patients in 2024, average age 74
CMS counts 3,326 Medicare patients who saw Dr. Mercer in 2024. The largest group is 65 to 74, with 1,479 patients. 75% of them have arthritis, and 72% have high cholesterol. 16% are also on Medicaid. Their average risk score is 1.33, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Mercer's median patient age at 60, with 53% women.
Dr. Mercer's Medicare patients by age, 2024
Dr. Mercer's Medicare patients by sex, 2024
- Women2,01260%
- Men1,31440%
Chronic conditions among Dr. Mercer's Medicare patients, 2024
- Arthritis75%
- High cholesterol72%
- High blood pressure70%
- Anxiety34%
- Mood disorders34%
- Depression30%
- Ischemic heart disease27%
- Osteoporosis26%
Share of Medicare patients with each condition. A patient can have several.
Dr. Mercer'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
- Women53%
- Men46%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
How Dr. Ronald William Mercer takes part in Medicare
Dr. Mercer 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. Ronald William Mercer received $16,874 in industry payments from 2023 to 2025
CMS Open Payments shows 10 general payments to Dr. Mercer from 4 drug and device companies from 2023 to 2025. Consulting fees make up the largest share, 98% of the total. Pfizer Inc. paid the most, $16,500.
General payments to Dr. Mercer by program year, 2023 to 2025
General payments to Dr. Mercer by kind, 2023 to 2025
- Consulting fees$16,50098%
- Food and beverage$2752%
- Travel and lodging$991%
Companies that paid Dr. Mercer the most, 2023 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Ronald William Mercer'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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. Ronald William Mercer
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. Ronald William Mercer's NPI number?
Dr. Ronald William Mercer's NPI number is 1437543766. It was assigned on March 25, 2015, and it is active in the NPI Registry.
What kind of doctor is Dr. Ronald William Mercer?
Dr. Ronald William Mercer is a diagnostic radiologist in Boston, Massachusetts. The primary specialty in the NPI Registry is Diagnostic Radiology Physician (taxonomy code 2085R0202X).
Where does Dr. Ronald William Mercer practice?
Dr. Mercer practices at 55 Fruit Street, Boston, MA 02114. Dr. Mercer's primary practice is Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham. Dmand AI also links Dr. Mercer to 3 hospitals, 3 medical groups and 1 community health center.
What is Dr. Ronald William Mercer's office phone number?
The practice phone on file for Dr. Mercer is (617) 726-2000.
What is Dr. Ronald William Mercer's medical license number?
Dr. Mercer holds Massachusetts license 270973.
Which hospitals is Dr. Ronald William Mercer affiliated with?
Dr. Mercer practices at Massachusetts General Hospital in Boston, Massachusetts. Dr. Mercer is also affiliated with Brigham and Women's Hospital. Dmand AI links Dr. Mercer to 3 more hospitals.
What medical group is Dr. Ronald William Mercer part of?
Dr. Mercer is linked to Massachusetts General Physicians Organization (MGPO). Dmand AI links Dr. Mercer to 3 more medical groups.
Does Dr. Ronald William Mercer accept Medicare?
Yes. CMS data shows Dr. Mercer billed Medicare for 3,929 services in 2024, and Dr. Mercer accepts Medicare assignment.
How many Medicare patients does Dr. Ronald William Mercer see?
CMS counts 3,326 Medicare patients who saw Dr. Mercer in 2024, with an average age of 74.
What services does Dr. Ronald William Mercer bill to Medicare?
In 2024, Dr. Mercer's most billed Medicare services were diagnostic imaging (73502), diagnostic imaging (73030) and diagnostic imaging (73630).
Has Dr. Ronald William Mercer received payments from drug or device companies?
CMS Open Payments shows $16,874 in general payments to Dr. Mercer from 4 companies from 2023 to 2025. The largest total came from Pfizer Inc.
How long has Dr. Ronald William Mercer been practicing?
Dr. Mercer graduated from medical school in 2015, 11 years ago.
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