Quick answers
- Does William L. Breckwoldt accept Medicare assignment?
- Yes. Medicare's clinician data says William L. Breckwoldt 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 L. Breckwoldt see?
- In 2024, CMS data shows 740 Original Medicare patients and 2,271 services for William L. Breckwoldt. This counts Original Medicare only and measures volume, not quality.
- What is William L. Breckwoldt's NPI number?
- 1306814272. 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 L. Breckwoldt, 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 | 740 |
|---|---|
| Services billed to Medicare | 2,271 |
| Different services or procedures | 69 |
| Participating Medicare provider | Yes |
| Average age of these patients | 78 |
Most frequent services
- Removal of skin and tissue, each additional 20.0 sq cm or less (11045)435 services
- Removal of skin and tissue, 20.0 sq cm or less (11042)330 services
- Ultrasound study of one arm or leg veins with compression and maneuvers (93971)190 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)155 services
- Ultrasound of both sides of head and neck blood flow (93880)134 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%
- Arthritis54%
- Chronic kidney disease43%
- Ischemic heart disease39%
- Diabetes37%
Hospitals where William L. Breckwoldt works
Medicare's Facility Affiliation Data lists William L. Breckwoldt at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Lahey Hospital & Medical Center, BurlingtonBurlington, MA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 220171
- Winchester HospitalWinchester, MA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 220105
Practice locations
Addresses where William L. Breckwoldt is enrolled with Medicare (CMS data updated October 2, 2026).
- 41 Mall RdBurlington, MA 01805
Group practices
Medicare enrollment lists William L. Breckwoldt as a member of this group (CMS data updated October 2, 2026).
- Beth Israel Lahey Health Specialty Care, Inc.267 clinicians in the group
Specialties
- Vascular Surgeryprimary
- General Surgeryalso
Other vascular surgeons in Burlington
Clinicians with the same Medicare primary specialty in Burlington, MA — not a recommendation.
Other clinicians in Beth Israel Lahey Health Specialty Care, Inc.
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Michigan Medical School |
| Graduation year | 1984 (42 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1306814272 |
| 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- 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