Blair J. Maerowitz, PA-C
Physician Assistant · Amherst, MA
Blair J. Maerowitz, PA-C is a physician assistant with a practice address in Amherst, Massachusetts, and NPI 1235107970, issued on Mar 9, 2006. Check the license (Massachusetts 1521, as entered in NPPES) with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Blair J. Maerowitz
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- 1521 MA
Self-reported in NPPES; status is on the state search - Practice location
- 29 Cottage Street, Amherst, MA 01002
- Phone
- (413) 406-3250
- Enumerated
- Mar 9, 2006
- Record last updated
- Mar 15, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (413) 549-7402
- Medicaid ID
- 9700340 MA
- Medicare enrollment
- Enrolled (PECOS I20071001000825); accepts Medicare assignment
- Medical or professional school
- Duke University School Of Medicine, 2002
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 4,713 in Massachusetts → Look up another NPI →
Verify Blair J. Maerowitz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Massachusetts board licenses this profession
Search for license 1521Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
85% more Medicare Part D claims than the average physician assistant in 2024
1,533 Medicare Part D claims for 611 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims.
Most prescribed
- Triamcinolone Acetonide327 claims
- Betamethasone Diprop Augmented136 claims
- Doxycycline Monohydrate70 claims
- Clobetasol Propionate67 claims
- Dupixent Syringe63 claims
- Imiquimod61 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): 57 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).
Industry payments in 2024: $240.33
5 payments; by number, the most common kind was education; the largest payer was Janssen Biotech, Inc. 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
- Pioneer Valley Dermatology PCAmherst, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Blair J. Maerowitz among 4,713 physician assistant records in Massachusetts
Blair J. Maerowitz, 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 2006, is newer than 1% of them.
- NPI issued2006 · 1% of these records are older, 87% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated2002 · 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).
12 physician assistant records list a practice address in Amherst
They are 12 of the 769 NPPES records with a practice address in Amherst, and 4,713 physician assistant records in Massachusetts.
All 4,713 in Massachusetts → Every provider in Amherst → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Michael Brown, PA-CAmherst, MA 010021770686859
- Hannah Colling, PA-CAmherst, MA 010021225983182
- Adam CorriveauAmherst, MA 010021295441954
- Casey Erelli, PA-CAmherst, MA 010021700409893
- Nora Mahoney, PA-CAmherst, MA 010021558996975
- Ashley Roberge, PA-CAmherst, MA 010021841081874
- Sarah Vacca, PA-CAmherst, MA 010021164082640
- Chalan Whelan, PA-CAmherst, MA 010021528984440
Common questions
What is Blair J. Maerowitz, PA-C's NPI number?
Blair J. Maerowitz, PA-C's National Provider Identifier (NPI) is 1235107970, issued on Mar 9, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Blair J. Maerowitz, PA-C located?
The NPPES record lists a practice address at 29 Cottage Street, Amherst, MA, 01002. Phone: (413) 406-3250. Providers update this record themselves, so call before visiting.
How can I verify Blair J. Maerowitz, PA-C's license?
NPPES lists Massachusetts license number 1521, as entered by the provider. Search the Massachusetts board that licenses this profession; the NPPES record confirms identity only.
How much does Blair J. Maerowitz, PA-C prescribe under Medicare Part D?
In 2024, Blair J. Maerowitz, PA-C had 1,533 Medicare Part D claims for 611 beneficiaries; the average among physician assistant prescribers was 830. Part D covers Medicare prescriptions only.
What is Blair J. Maerowitz, PA-C's MIPS final score?
The 2023 MIPS final score is 57 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.