Quick answers
- Does William K. Lagasse accept Medicare assignment?
- Yes. Medicare's clinician data says William K. Lagasse 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 K. Lagasse see?
- In 2024, CMS data shows 35 Original Medicare patients and 309 services for William K. Lagasse. This counts Original Medicare only and measures volume, not quality.
- What is William K. Lagasse's NPI number?
- 1871716522. 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 K. Lagasse, 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 | 35 |
|---|---|
| Services billed to Medicare | 309 |
| Different services or procedures | 5 |
| Participating Medicare provider | Yes |
| Average age of these patients | 46 |
Most frequent services
- Psychotherapy, 45 minutes (90834)192 services
- Psychotherapy, 30 minutes (90832)111 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).
- Anxiety75%
- Depression66%
- High blood pressure40%
- High cholesterol37%
Practice locations
Addresses where William K. Lagasse is enrolled with Medicare (CMS data updated October 2, 2026).
- 165 Lancaster StPortland, ME 04101
- 22 Bramhall StPortland, ME 04102
- 707 Sable Oaks Dr, Suite 230South Portland, ME 04106 (603) 883‑0005
Group practices
Medicare enrollment lists William K. Lagasse as a member of these groups (CMS data updated October 2, 2026).
- MaineHealth2,633 clinicians in the group
- The Counseling Center of Nashua Inc258 clinicians in the group
Specialties
- Clinical Social Workerprimary
Other clinical social workers in Portland
Clinicians with the same Medicare primary specialty in Portland, ME — not a recommendation.
Other clinicians in MaineHealth
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | CSW |
|---|---|
| Graduation year | 2005 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1871716522 |
| 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