Marc A. Theroux, MD
Internal Medicine Physician · Fall River, MA
Marc A. Theroux, MD is an internal medicine physician with a practice address in Fall River, Massachusetts, and NPI 1497742514, issued on Oct 4, 2005. Check the license (Massachusetts 72558, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Marc A. Theroux
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 72558 MA
MD08048 RI
Self-reported in NPPES; status is on the state search - Practice location
- 534 Prospect St, Fall River, MA 02720
- Phone
- (508) 973-7766
- Enumerated
- Oct 4, 2005
- Record last updated
- Apr 27, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (508) 973-7753
- Medicaid ID
- 110048792A MA
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 6,825 in Massachusetts → Look up another NPI →
Also registered at 534 Prospect St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Taylor Bardsley, FNP-CNurse Practitioner1417792524
- Brianne Castro, FNP-BCNurse Practitioner1790514735
- Bamidele Fagbola, DNP, AGPCNPNurse Practitioner1265002075
- Fatima MedeirosNurse Practitioner1144757998
- Linda Paiva, NPNurse Practitioner1619302023
Verify Marc A. Theroux in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 72558Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.6 times the Medicare Part D claims of the average internal medicine physician in 2024
8,114 Medicare Part D claims for 703 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 319 claims were for opioids.
Most prescribed
- Rosuvastatin Calcium431 claims
- Atorvastatin Calcium355 claims
- Lisinopril346 claims
- Amlodipine Besylate262 claims
- Levothyroxine Sodium259 claims
- Omeprazole246 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Marc A. Theroux among 6,825 internal medicine physician records in Massachusetts
Marc A. Theroux, MD is one of 6,825 internal medicine physician records with a practice address in Massachusetts. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 88% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 60% of these records are
- Record last updated2020 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
62 internal medicine physician records list a practice address in Fall River
They are 62 of the 3,032 NPPES records with a practice address in Fall River, and 6,825 internal medicine physician records in Massachusetts.
All 6,825 in Massachusetts → Every provider in Fall River → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Miguel Brillantes, MDFall River, MA 027201609878859
- Mark Hilty, MDFall River, MA 027201609863729
- Ossama Labib, M.D.Fall River, MA 027201225033673
- Nicole McDonald, M.D.Fall River, MA 027201992744080
- Irina Merport, M.D.Fall River, MA 027201992760912
- Harvey Reback, MDFall River, MA 027201285668947
- Ronald Schwartz, M.D.Fall River, MA 027201477519080
- Kenath Shamir, M.D.Fall River, MA 027201811952955
Common questions
What is Marc A. Theroux, MD's NPI number?
Marc A. Theroux, MD's National Provider Identifier (NPI) is 1497742514, issued on Oct 4, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Marc A. Theroux, MD located?
The NPPES record lists a practice address at 534 Prospect St, Fall River, MA, 02720. Phone: (508) 973-7766. Providers update this record themselves, so call before visiting.
How can I verify Marc A. Theroux, MD's license?
NPPES lists Massachusetts license number 72558, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Marc A. Theroux, MD prescribe under Medicare Part D?
In 2024, Marc A. Theroux, MD had 8,114 Medicare Part D claims for 703 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.