Rebecca Leanne Gregor, PA
Medical Physician Assistant · Springfield, MA
Rebecca Leanne Gregor, PA is a medical physician assistant with a practice address in Springfield, Massachusetts, and NPI 1891171237, issued on Aug 8, 2015. Check the license (Massachusetts PA5433, as entered in NPPES) with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Rebecca Leanne Gregor
- Credential
- PA
- Primary taxonomy
- Medical Physician Assistant 363AM0700X
- License number
- PA5433 MA
Self-reported in NPPES; status is on the state search - Practice location
- 271 Carew St, Springfield, MA 01104
- Phone
- (413) 748-9000
- Enumerated
- Aug 8, 2015
- Record last updated
- Jan 28, 2025
- Medicare enrollment
- Enrolled (PECOS I20151014002375); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest medical physician assistant records → All 886 in Massachusetts → Look up another NPI →
Also registered at 271 Carew St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Larisa Altman, NPAdult Health Nurse Practitioner1093917213
- Kaira Ayad, PASurgical Physician Assistant1023757218
- Alistair Bell, MDInternal Medicine Physician1265953616
Verify Rebecca Leanne Gregor in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Massachusetts board licenses this profession
Search for license PA5433Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
48% fewer Medicare Part D claims than the average medical physician assistant in 2024
594 Medicare Part D claims for 385 beneficiaries, against an average of 1,148 among the 23,801 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims.
Most prescribed
- Prednisone105 claims
- Doxycycline Hyclate47 claims
- Cefuroxime37 claims
- Albuterol Sulfate Hfa35 claims
- Cefpodoxime Proxetil33 claims
- Amoxicillin-Clavulanate Potass31 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.
Industry payments in 2024: $24.44
1 payment: food and beverage; the largest payer was Gilead Sciences, Inc. The 16,165 providers of this specialty with any payment received $1,055.00 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
- Urgent Care Specialists PCWilbraham, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Rebecca Leanne Gregor among 886 medical physician assistant records in Massachusetts
Rebecca Leanne Gregor, PA is one of 886 medical 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 2015, is newer than 55% of them.
- NPI issued2015 · 55% of these records are older, 40% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2015 · median 2015 among the 559 with a school on file
- Record last updated2025 · 53% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363AM0700X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
182 medical physician assistant records list a practice address in Springfield
They are 182 of the 8,553 NPPES records with a practice address in Springfield, and 886 medical physician assistant records in Massachusetts.
All 886 in Massachusetts → Every provider in Springfield → Medical Physician Assistant nationwide →
The 8 medical physician assistant records with the nearest ZIP codes
- Lauren Carra, PA-CSpringfield, MA 011041831530609
- Natalee Georgantas, PA-CSpringfield, MA 011041326391707
- John Hurley, P.A.Springfield, MA 011041558389072
- Patrick Lafond, PA-CSpringfield, MA 011041881669901
- Lynn Larochelle, PACSpringfield, MA 011041083704829
- Samantha Lyman, PA-CSpringfield, MA 011041407297971
- Lisa Maheu, PA-CSpringfield, MA 011041215952239
- Laura Mitrowski, PACSpringfield, MA 011041528319613
Common questions
What is Rebecca Leanne Gregor, PA's NPI number?
Rebecca Leanne Gregor, PA's National Provider Identifier (NPI) is 1891171237, issued on Aug 8, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Rebecca Leanne Gregor, PA located?
The NPPES record lists a practice address at 271 Carew St, Springfield, MA, 01104. Phone: (413) 748-9000. Providers update this record themselves, so call before visiting.
How can I verify Rebecca Leanne Gregor, PA's license?
NPPES lists Massachusetts license number PA5433, as entered by the provider. Search the Massachusetts board that licenses this profession; the NPPES record confirms identity only.
How much does Rebecca Leanne Gregor, PA prescribe under Medicare Part D?
In 2024, Rebecca Leanne Gregor, PA had 594 Medicare Part D claims for 385 beneficiaries; the average among medical physician assistant prescribers was 1,148. 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.