Ruth A. Ross-McCormack, MD
Gastroenterology Physician · Arlington, MA
Ruth A. Ross-McCormack, MD is a gastroenterology physician with a practice address in Arlington, Massachusetts, and NPI 1295835833, issued on Sep 24, 2006. Check the license (Massachusetts 77649, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Ruth A. Ross-McCormack
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 77649 MA
Self-reported in NPPES; status is on the state search - Practice location
- 37 Broadway, Arlington, MA 02474
- Phone
- (781) 641-0100
- Enumerated
- Sep 24, 2006
- Record last updated
- Oct 30, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (781) 744-7132
- Medicaid ID
- 3141161 MA
- Medicare enrollment
- Enrolled (PECOS I20050517000131); accepts Medicare assignment
- Medical or professional school
- Wake Forest University School Of Medicine, 1990
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 686 in Massachusetts → Look up another NPI →
Also registered at 37 Broadway
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Carol Bickford, MSPTPhysical Therapist1992136337
- Ronald Criscitiello, M.DInternal Medicine Physician1114027091
Verify Ruth A. Ross-McCormack in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 77649Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
13% more Medicare Part D claims than the average gastroenterology physician in 2024
917 Medicare Part D claims for 380 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 4% of claims.
Most prescribed
- Famotidine264 claims
- Omeprazole196 claims
- Gavilyte-C93 claims
- Pantoprazole Sodium64 claims
- Gavilyte-G51 claims
- Esomeprazole Magnesium36 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.
The MIPS final score for 2023 (Medicare payment program): 91.4 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through 2 group practices
- Beth Israel Lahey Health Primary Care, IncSouth Hamilton, MA
- Lahey Clinic IncBurlington, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ruth A. Ross-McCormack among 686 gastroenterology physician records in Massachusetts
Ruth A. Ross-McCormack, MD is one of 686 gastroenterology physician records with a practice address in Massachusetts. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 14% of them.
- NPI issued2006 · 14% of these records are older, 49% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated1990 · median 2004 among the 491 with a school on file
- Record last updated2012 · 66% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Massachusetts
There are 686 gastroenterology physician records in Massachusetts.
All 686 in Massachusetts → Every provider in Arlington → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Michael Richmond, M.D.Watertown, MA 024721285661892
- Mamigon Garabedian, M.D.Belmont, MA 024781003915844
- Rahul Dalal, MDChestnut Hill, MA 024671902291453
- Arthur Gertler, M.D.Wellesley, MA 024811104969682
- Matthew Hamilton, M.D.Chestnut Hill, MA 024671982652814
- John Kauffman, MDChestnut Hill, MA 024671720052038
- Steven Landau, MDWellesley Hills, MA 024811083826515
- Jacquelyn Chenelle, PA-CNewton, MA 024621760905699
Common questions
What is Ruth A. Ross-McCormack, MD's NPI number?
Ruth A. Ross-McCormack, MD's National Provider Identifier (NPI) is 1295835833, issued on Sep 24, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Ruth A. Ross-McCormack, MD located?
The NPPES record lists a practice address at 37 Broadway, Arlington, MA, 02474. Phone: (781) 641-0100. Providers update this record themselves, so call before visiting.
How can I verify Ruth A. Ross-McCormack, MD's license?
NPPES lists Massachusetts license number 77649, 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 Ruth A. Ross-McCormack, MD prescribe under Medicare Part D?
In 2024, Ruth A. Ross-McCormack, MD had 917 Medicare Part D claims for 380 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
What is Ruth A. Ross-McCormack, MD's MIPS final score?
The 2023 MIPS final score is 91.4 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.