Eric Bonnem, MD
NPI 1265426035 · Hematology & Oncology Physician · Manchester, NH
Enrolled with Medicare as Practitioner - Medical Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Eric Bonnem, MD is a Hematology & Oncology Physician provider in Manchester, NH (NPI 1265426035).
Provider details
- NPI number
- 1265426035
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 24083 (WV)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
20 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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 methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 34 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Letrozole | 106 | 35 |
| Prednisone | 47 | 15 |
| Anastrozole | 42 | 11 |
| Allopurinol | 38 | — |
| Ruxolitinib Phosphatebrand: Jakafi | 37 | — |
| Levothyroxine Sodium | 37 | 13 |
| Hydroxyurea | 36 | — |
| Acyclovir | 36 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$18 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
Registry dates
- Enumerated
- 2005-09-07
- Last updated
- 2018-07-06
Frequently asked questions
- What is Eric Bonnem's NPI number?
- Eric Bonnem's National Provider Identifier (NPI) is 1265426035, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Eric Bonnem's specialty?
- Eric Bonnem is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Eric Bonnem located?
- Eric Bonnem's practice location on file with NPPES is 87 Mcgregor St, Manchester, NH 03102.
- What is Eric Bonnem's phone number?
- The practice phone number listed in the NPPES registry for Eric Bonnem is (603) 695-2500.
- Does Eric Bonnem accept Medicare?
- Eric Bonnem is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Eric Bonnem's NPI active?
- Yes — Eric Bonnem's NPI (1265426035) is active in the NPPES registry as of the last update on 2018-07-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.