MR. WILLIAM BERNARD DWINNELLS JR. LMHC
NPI 1003980665
Counselor - Mental Health in Ashland, MA
About Mr. William Bernard Dwinnells Jr. Lmhc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MR. WILLIAM BERNARD DWINNELLS JR. LMHC (NPI 1003980665) is an individual mental health provider in Ashland, Massachusetts and active in the NPI registry since November 2006. He is enrolled in Medicare PECOS and is a graduate of Other (2000).
NPPES Registry Identity
Specialties & Licenses 2
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
Mr. William Bernard Dwinnells Jr. Lmhc 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 Dwinnells reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Norwood, MA 02062
- Reassigned Medicare billing, Massachusetts enrollment
- 180 clinicians in this Medicare group
Denver, CO 80202
- Reassigned Medicare billing, Massachusetts and Vermont enrollments
- 94 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.
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 Dwinnells's NPI number?
The NPI number for William Dwinnells is 1003980665. It was assigned to this individual provider in the NPPES registry on November 17, 2006.
Where is William Dwinnells located?
William Dwinnells practices at 40 Spyglass Hill Dr, Ashland, MA 01721. The listed phone number is (978) 254-4119.
What is William Dwinnells's specialty?
The primary specialty registered for this NPI is Counselor, specializing in Mental Health, with taxonomy code 101YM0800X.
Is William Dwinnells enrolled in Medicare?
Yes. William Dwinnells 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 Dwinnells's services?
According to the CMS Revalidation Reassignment List (October 2026 release), William Dwinnells reassigns Medicare benefits to 2 organizations: Riverside Community Care, Inc. (Norwood, MA) and Sondermind Provider Network LLC (Denver, CO). 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 Dwinnells's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does William Dwinnells accept?
Health plans from Anthem Blue Cross and Blue Shield, Harvard Pilgrim Health Care and WellSense Health Plan list William Dwinnells 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 Dwinnells was last updated on February 8, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Mr. William Bernard Dwinnells Jr., LMHC · NPI 1003980665
Mental Health provider in Ashland, Massachusetts. Individual provider, active in the CMS NPPES registry since November 17, 2006.
## Identity
- **NPI:** 1003980665 (Entity type: Individual)
- **Enumerated:** November 17, 2006
- **Primary specialty:** Counselor - Mental Health · taxonomy 101YM0800X
- **Sole proprietor:** Yes
## Practice location
- **Address:** 40 SPYGLASS HILL DR, Ashland, MA 01721-2365
- **Phone:** (978) 254-4119
## 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): Riverside Community Care, Inc. (NPI 1780791467, Norwood, MA); Sondermind Provider Network LLC (NPI 1760854442, Denver, CO) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2000
## Record status
- **NPPES last updated:** February 8, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1003980665) · Data from the CMS NPPES public registry.