Sean Michael Calnan, PA-C
Physician Assistant · Watertown, MA
Sean Michael Calnan, PA-C is a physician assistant with a practice address in Watertown, Massachusetts, and NPI 1831594134, issued on Oct 29, 2014. Check the license (Massachusetts PA5181, as entered in NPPES) with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Sean Michael Calnan
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License numbers
- PA5181 MA
#PA 00788 RI
Self-reported in NPPES; status is on the state search - Practice location
- 11 Mount Auburn Street, Watertown, MA 02472
- Phone
- (781) 653-0100
- Enumerated
- Oct 29, 2014
- Record last updated
- Oct 15, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20161024000210); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 4,713 in Massachusetts → Look up another NPI →
Verify Sean Michael Calnan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Massachusetts board licenses this profession
Search for license PA5181Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
15% more Medicare Part D claims than the average physician assistant in 2024
954 Medicare Part D claims for 252 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. 13 claims were for opioids.
Most prescribed
- Atorvastatin Calcium93 claims
- Levothyroxine Sodium62 claims
- Amlodipine Besylate58 claims
- Omeprazole41 claims
- Losartan Potassium34 claims
- Lisinopril31 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.
Bills Medicare through one group practice
- Mass General Brigham Community Physicians IncWatertown, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sean Michael Calnan among 4,713 physician assistant records in Massachusetts
Sean Michael Calnan, PA-C 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
- Graduated2014 · median 2019 among the 3,217 with a school on file
- Record last updated2021 · 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 Watertown → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Amanda Bolbotowski, PA-CWatertown, MA 024721053865436
- Alice Frawley, PAWatertown, MA 024721356070585
- Szu-Ping Huang, PA-CWatertown, MA 024721912503533
- Samantha JewersWatertown, MA 024721457961765
- Nicole Roy, PA-CWatertown, MA 024721831618149
- Kaitlyn ShoelsonWatertown, MA 024721073289542
- Daniela Gonzalez, PA-CArlington, MA 024741699615377
- Julie Martin, PA-CArlington, MA 024741043889975
Common questions
What is Sean Michael Calnan, PA-C's NPI number?
Sean Michael Calnan, PA-C's National Provider Identifier (NPI) is 1831594134, issued on Oct 29, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Sean Michael Calnan, PA-C located?
The NPPES record lists a practice address at 11 Mount Auburn Street, Watertown, MA, 02472. Phone: (781) 653-0100. Providers update this record themselves, so call before visiting.
How can I verify Sean Michael Calnan, PA-C's license?
NPPES lists Massachusetts license number PA5181, as entered by the provider. Search the Massachusetts board that licenses this profession; the NPPES record confirms identity only.
How much does Sean Michael Calnan, PA-C prescribe under Medicare Part D?
In 2024, Sean Michael Calnan, PA-C had 954 Medicare Part D claims for 252 beneficiaries; the average among physician assistant prescribers was 830. 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.