Quick answers
- Does Nancy D. Efferson Bonachea accept Medicare assignment?
- Yes. Medicare's clinician data says Nancy D. Efferson Bonachea accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Nancy D. Efferson Bonachea see?
- In 2024, CMS data shows 599 Original Medicare patients and 11,470 services for Nancy D. Efferson Bonachea. This counts Original Medicare only and measures volume, not quality.
- What is Nancy D. Efferson Bonachea's NPI number?
- 1932173234. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Nancy D. Efferson Bonachea, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 599 |
|---|---|
| Services billed to Medicare | 11,470 |
| Different services or procedures | 34 |
| Participating Medicare provider | Yes |
| Average age of these patients | 78 |
Most frequent services
- Injection, faricimab-svoa, 0.1 mg (J2777)5,760 services
- Imaging of retina (92134)1,300 services
- Injection, aflibercept hd, 1 mg (J0177)1,248 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)571 services
- Injection of drug into eye (67028)467 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High cholesterol75%
- High blood pressure74%
- Arthritis42%
- Diabetes32%
- Ischemic heart disease22%
- Chronic kidney disease22%
Practice locations
Addresses where Nancy D. Efferson Bonachea is enrolled with Medicare (CMS data updated October 2, 2026).
- 25 Buttrick Rd, Suite C3Londonderry, NH 03053 (603) 669‑3925
- 764 2nd StManchester, NH 03102 (603) 669‑3925
Group practices
Medicare enrollment lists Nancy D. Efferson Bonachea as a member of this group (CMS data updated October 2, 2026).
- NH Eye Associates PLLC12 clinicians in the group
Specialties
- Ophthalmologyprimary
Other ophthalmologists in Londonderry
Clinicians with the same Medicare primary specialty in Londonderry, NH — not a recommendation.
Other clinicians in NH Eye Associates PLLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Tufts University School Of Medicine |
| Graduation year | 1990 (36 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1932173234 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians