Quick answers
- Does William P. Macnamara Iii accept Medicare assignment?
- Yes. Medicare's clinician data says William P. Macnamara Iii 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 William P. Macnamara Iii see?
- In 2024, CMS data shows 31 Original Medicare patients and 365 services for William P. Macnamara Iii. This counts Original Medicare only and measures volume, not quality.
- What is William P. Macnamara Iii's NPI number?
- 1073546099. 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 William P. Macnamara Iii, 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 | 31 |
|---|---|
| Services billed to Medicare | 365 |
| Different services or procedures | 2 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Chiropractic manipulative treatment, 1-2 spinal regions (98940)341 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 blood pressure75%
- High cholesterol75%
- Arthritis45%
Practice locations
Addresses where William P. Macnamara Iii is enrolled with Medicare (CMS data updated October 2, 2026).
- 138 Wauregan RdDanielson, CT 06239 (860) 779‑9870
Specialties
- Chiropracticprimary
Other chiropractors in Connecticut
Clinicians with the same Medicare primary specialty in Connecticut — not a recommendation.
Clinician information
| Credential | CH |
|---|---|
| School | Life Chiropractic College |
| Graduation year | 1991 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1073546099 |
| 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