WILLIAM KEITH LAGASSE LCSW
NPI 1871716522
Social Worker - Clinical in Lewiston, ME
About William Keith Lagasse Lcsw NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
WILLIAM KEITH LAGASSE LCSW (NPI 1871716522) is an individual clinical provider in Lewiston, Maine, licensed in Maine (LC11562) and active in the NPI registry since April 2007. He is enrolled in Medicare PECOS and is a graduate of Other (2005).
NPPES Registry Identity
Specialties & Licenses
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
William Keith Lagasse Lcsw is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
2Medicare enrollment records show William Lagasse reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Norway, ME 04268
- Reassigned Medicare billing, Maine enrollment
- 3,140 clinicians in this Medicare group
Nashua, NH 03063
- Reassigned Medicare billing, Maine enrollment
- 125 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 2
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 04240 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is William Lagasse's NPI number?
The NPI number for William Lagasse is 1871716522. It was assigned to this individual provider in the NPPES registry on April 11, 2007.
Where is William Lagasse located?
William Lagasse practices at 105 Middle St Ste 2, Lewiston, ME 04240. The listed phone number is (207) 576-9645.
What is William Lagasse's specialty?
The primary specialty registered for this NPI is Social Worker, specializing in Clinical, with taxonomy code 1041C0700X.
Is William Lagasse enrolled in Medicare?
Yes. William Lagasse is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for William Lagasse's services?
According to the CMS Revalidation Reassignment List (October 2026 release), William Lagasse reassigns Medicare benefits to 2 organizations: Mainehealth (Norway, ME) and The Counseling Center Of Nashua Inc (Nashua, NH). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for William Lagasse's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does William Lagasse accept?
Health plans from Anthem Blue Cross and Blue Shield and Harvard Pilgrim Health Care list William Lagasse as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for William Lagasse was last updated on May 8, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# William Keith Lagasse, LCSW · NPI 1871716522
Clinical provider in Lewiston, Maine. Individual provider, active in the CMS NPPES registry since April 11, 2007.
## Identity
- **NPI:** 1871716522 (Entity type: Individual)
- **Enumerated:** April 11, 2007
- **Primary specialty:** Social Worker - Clinical · taxonomy 1041C0700X
- **State license:** LC11562 (Maine)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 105 MIDDLE ST STE 2, Lewiston, ME 04240-7037
- **Phone:** (207) 576-9645 · **Fax:** (207) 784-6021
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Mainehealth (NPI 1447730247, Norway, ME); The Counseling Center Of Nashua Inc (NPI 1144275389, Nashua, NH) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2005
## Record status
- **NPPES last updated:** May 8, 2008
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Source: [NPI Profile](https://npiprofile.com/npi/1871716522) · Data from the CMS NPPES public registry.