Calvin C. Ross, M.D.
Internal Medicine Physician · South Boston, MA
Calvin C. Ross, M.D. is an internal medicine physician with a practice address in South Boston, Massachusetts, and NPI 1326178922, issued on Mar 6, 2007. Check the license (Massachusetts 31545, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Calvin C. Ross
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 31545 MA
Self-reported in NPPES; status is on the state search - Practice location
- 585 E Broadway, South Boston, MA 02127
- Phone
- (617) 268-2404
- Enumerated
- Mar 6, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 6,825 in Massachusetts → Look up another NPI →
Verify Calvin C. Ross in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 31545Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average internal medicine physician in 2024
79 Medicare Part D claims, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 18% of claims.
Most prescribed
- Invega Sustenna14 claims
- Lisinopril13 claims
- Atorvastatin Calcium12 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.
Calvin C. Ross among 6,825 internal medicine physician records in Massachusetts
Calvin C. Ross, M.D. 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 2007, is newer than 46% of them.
- NPI issued2007 · 46% of these records are older, 45% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 60% of these records are
- Record last updated2007 · 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).
7 internal medicine physician records list a practice address in South Boston
They are 7 of the 224 NPPES records with a practice address in South Boston, and 6,825 internal medicine physician records in Massachusetts.
All 6,825 in Massachusetts → Every provider in South Boston → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Pamela Cattel, MDSouth Boston, MA 021271023081841
- Suru Lin, M.D., M.P.H.South Boston, MA 021271316112162
- Mohamed Mehssen, MDSouth Boston, MA 021271578536389
- Sheel Saxena, MDSouth Boston, MA 021271629041462
- James Scharback, M.D.Boston, MA 021271457401598
- Sarah Sloan, M.D.South Boston, MA 021271770719460
- Sujata Welankiwar, M.D.South Boston, MA 021271881759512
- Reginald Barnett, MDMattapan, MA 021261649207051
Common questions
What is Calvin C. Ross, M.D.'s NPI number?
Calvin C. Ross, M.D.'s National Provider Identifier (NPI) is 1326178922, issued on Mar 6, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Calvin C. Ross, M.D. located?
The NPPES record lists a practice address at 585 E Broadway, South Boston, MA, 02127. Phone: (617) 268-2404. Providers update this record themselves, so call before visiting.
How can I verify Calvin C. Ross, M.D.'s license?
NPPES lists Massachusetts license number 31545, 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 Calvin C. Ross, M.D. prescribe under Medicare Part D?
In 2024, Calvin C. Ross, M.D. had 79 Medicare Part D claims; 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.