Stephen J. Bonasera, MD
Geriatric Medicine (Internal Medicine) Physician · Longmeadow, MA
Stephen J. Bonasera, MD is a geriatric medicine (internal medicine) physician with a practice address in Longmeadow, Massachusetts, and NPI 1780632729, issued on May 4, 2006. Check the license (Massachusetts 290745, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Stephen J. Bonasera
- Credential
- MD
- Primary taxonomy
- Geriatric Medicine (Internal Medicine) Physician 207RG0300X
- License number
- 290745 MA
Self-reported in NPPES; status is on the state search - Practice location
- 21 Dwight RD Ste 204, Longmeadow, MA 01106
- Phone
- (413) 795-0268
- Enumerated
- May 4, 2006
- Record last updated
- Jan 21, 2025
- Fax
- (413) 795-8502
- Medicare enrollment
- Enrolled (PECOS I20220119002845); accepts Medicare assignment
- Medical or professional school
- Emory University School Of Medicine, 1995
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest geriatric medicine (internal medicine) physician records → All 225 in Massachusetts → Look up another NPI →
Also registered at 21 Dwight RD Ste 204
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Grace Albert, PA-CMedical Physician Assistant1881819209
- Lubna Attal, MDGeriatric Medicine (Internal Medicine) Physician1073132346
- Robin Gottlieb, MDPhysical Medicine & Rehabilitation Physician1992889992
- Julio Martinez-Silvestrini, M.D.Physical Medicine & Rehabilitation Physician1891710521
- Simone Masson, NPGerontology Nurse Practitioner1790118271
- Jonathan Richmond, M.D.Hospice and Palliative Medicine (Physical Medicine & Rehabilitation) Physician1184819583
Verify Stephen J. Bonasera in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 290745Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average geriatric medicine (internal medicine) physician in 2024
188 Medicare Part D claims for 67 beneficiaries, against an average of 4,246 among the 3,116 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Donepezil Hcl97 claims
- Mirtazapine18 claims
- Escitalopram Oxalate14 claims
- Citalopram Hbr11 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: $84.81
1 payment: food and beverage; the largest payer was Eisai Inc. The 1,004 providers of this specialty with any payment received $1,720.82 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
- Baystate Medical Practices IncLongmeadow, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Stephen J. Bonasera among 225 geriatric medicine (internal medicine) physician records in Massachusetts
Stephen J. Bonasera, MD is one of 225 geriatric medicine (internal medicine) physician records with a practice address in Massachusetts. 71% 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, 44% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated1995 · median 2000 among the 119 with a school on file
- Record last updated2025 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0300X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Geriatric Medicine (Internal Medicine) Physician providers in Massachusetts
There are 225 geriatric medicine (internal medicine) physician records in Massachusetts.
All 225 in Massachusetts → Every provider in Longmeadow → Geriatric Medicine (Internal Medicine) Physician nationwide →
The 8 geriatric medicine (internal medicine) physician records with the nearest ZIP codes
- Lubna Attal, MDLongmeadow, MA 011061073132346
- Ujjwala Seetha Bhagavatula, M.D.Springfield, MA 011071336592369
- Maura Brennan, MDSpringfield, MA 011071962595421
- Alison Grover, MD, MPHSpringfield, MA 011071326174574
- Erin Leahy, M.D.Springfield, MA 011071235339607
- Victoria Nguyen, DOSpringfield, MA 011071518533785
- Yael Tarshish, MDSpringfield, MA 011071285163923
- Deepu Thomas, MDSpringfield, MA 011071932376803
Common questions
What is Stephen J. Bonasera, MD's NPI number?
Stephen J. Bonasera, MD's National Provider Identifier (NPI) is 1780632729, issued on May 4, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Stephen J. Bonasera, MD located?
The NPPES record lists a practice address at 21 Dwight RD Ste 204, Longmeadow, MA, 01106. Phone: (413) 795-0268. Providers update this record themselves, so call before visiting.
How can I verify Stephen J. Bonasera, MD's license?
NPPES lists Massachusetts license number 290745, 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 Stephen J. Bonasera, MD prescribe under Medicare Part D?
In 2024, Stephen J. Bonasera, MD had 188 Medicare Part D claims for 67 beneficiaries; the average among geriatric medicine (internal medicine) physician prescribers was 4,246. 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.