Rian McCormack
Physician Assistant · Somerville, MA
Rian McCormack is a physician assistant with a practice address in Somerville, Massachusetts, and NPI 1699186312, issued on May 15, 2014. Check the license (Massachusetts PA4876, as entered in NPPES) with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Rian McCormack
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- PA4876 MA
Self-reported in NPPES; status is on the state search - Practice location
- 33 Bow St, Somerville, MA 02143
- Phone
- (617) 625-9992
- Enumerated
- May 15, 2014
- Record last updated
- May 15, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (617) 666-0662
- Medicare enrollment
- Enrolled (PECOS I20230510001409); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 4,713 in Massachusetts → Look up another NPI →
Verify Rian McCormack in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Massachusetts board licenses this profession
Search for license PA4876Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
69% more Medicare Part D claims than the average physician assistant in 2024
1,403 Medicare Part D claims for 152 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. 101 claims were for opioids.
Most prescribed
- Lorazepam127 claims
- Eliquis79 claims
- Quetiapine Fumarate57 claims
- Amlodipine Besylate50 claims
- Clonazepam50 claims
- Tramadol Hcl46 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 practice group's MIPS final score for 2023 (Medicare payment program): 100 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. 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, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $82.18
1 payment: food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 64,719 providers of this specialty with any payment received $841.65 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- 360 Healthcare LLCBurlington, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Rian McCormack among 4,713 physician assistant records in Massachusetts
Rian McCormack is one of 4,713 physician assistant records with a practice address in Massachusetts. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2014, is newer than 30% of them.
- NPI issued2014 · 30% of these records are older, 67% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated2012 · median 2019 among the 3,217 with a school on file
- Record last updated2014 · 38% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Physician Assistant providers in Massachusetts
There are 4,713 physician assistant records in Massachusetts.
All 4,713 in Massachusetts → Every provider in Somerville → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Danielle Jacobsen, PA-CSomerville, MA 021431811546781
- Nicolas Sluyter-Beltrao, PA-CSomerville, MA 021431609544428
- Catherine Tovey, PA-CSomerville, MA 021431295355600
- Claire WanSomerville, MA 021431003288572
- Grace Bouton, PA-CSomerville, MA 021441417506684
- Rachid Chakri, PA-CCambridge, MA 021421033763354
- Giyoung Choi, PHYSICIAN ASSISTANTSomerville, MA 021441154192334
- D. Gilbert, PA-CSomerville, MA 021441033274436
Common questions
What is Rian McCormack's NPI number?
Rian McCormack's National Provider Identifier (NPI) is 1699186312, issued on May 15, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Rian McCormack located?
The NPPES record lists a practice address at 33 Bow St, Somerville, MA, 02143. Phone: (617) 625-9992. Providers update this record themselves, so call before visiting.
How can I verify Rian McCormack's license?
NPPES lists Massachusetts license number PA4876, as entered by the provider. Search the Massachusetts board that licenses this profession; the NPPES record confirms identity only.
How much does Rian McCormack prescribe under Medicare Part D?
In 2024, Rian McCormack had 1,403 Medicare Part D claims for 152 beneficiaries; the average among physician assistant prescribers was 830. Part D covers Medicare prescriptions only.
What is Rian McCormack's MIPS final score?
The 2023 MIPS final score is 100 of 100, reported for the practice group. 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.