Stephen Bonasera, MD
NPI 1780632729 · Geriatric Medicine (Internal Medicine) Physician · Longmeadow, MA
Enrolled with Medicare as Practitioner - Geriatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Stephen Bonasera, MD is a Geriatric Medicine (Internal Medicine) Physician provider in Longmeadow, MA (NPI 1780632729).
Provider details
- NPI number
- 1780632729
- Entity type
- Individual
- Primary specialty
- Geriatric Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 290745 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
1,046 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Prolonged Office Or Other Outpatient Evaluation and Management Service(s) Beyond the Maximum Required Time of the Primary Procedure Which Has Been Selected Using Total Time on the Date of the Primary Service; Each Additional 15 Minutes By the Physician OrG2212 | 836 | $32 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 110 | $181 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 64 | $222 |
| Telephone Medical Discussion With Physician, 21-30 Minutes99443 | 36 | $130 |
Typical Medicare-allowed amounts for these services range $32–$222 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 4 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Donepezil Hcl | 97 | 36 |
| Mirtazapine | 18 | — |
| Escitalopram Oxalate | 14 | — |
| Citalopram Hydrobromidebrand: Citalopram Hbr | 11 | — |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$85 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 759 Chestnut StreetSpringfield, MA 01107-1619Phone: (413) 794-3147Fax: (413) 794-4054
Registry dates
- Enumerated
- 2006-05-04
- Last updated
- 2025-01-21
- Certified
- 2025-01-21
Frequently asked questions
- What is Stephen Bonasera's NPI number?
- Stephen Bonasera's National Provider Identifier (NPI) is 1780632729, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stephen Bonasera's specialty?
- Stephen Bonasera is listed in the NPPES registry with a primary specialty of Geriatric Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Stephen Bonasera located?
- Stephen Bonasera's practice location on file with NPPES is 21 Dwight Rd Ste 204, Longmeadow, MA 01106-1765.
- What is Stephen Bonasera's phone number?
- The practice phone number listed in the NPPES registry for Stephen Bonasera is (413) 795-0268.
- Does Stephen Bonasera accept Medicare?
- Stephen Bonasera is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Stephen Bonasera's NPI active?
- Yes — Stephen Bonasera's NPI (1780632729) is active in the NPPES registry as of the last update on 2025-01-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.