William Willoughby, LMHC
NPI 1922526458 · Mental Health Counselor · Belmont, MA
Enrolled with Medicare as Practitioner - Mental Health Counselor · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Willoughby, LMHC is a Mental Health Counselor provider in Belmont, MA (NPI 1922526458).
Provider details
- NPI number
- 1922526458
- Entity type
- Individual
- Primary specialty
- Mental Health CounselorBehavioral Health & Social Service Providers
- Credential
- LMHC
- Sex
- Male
- Sole proprietor
- Yes
- License
- LMHC10001101 (MA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
8 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2017-09-05
- Last updated
- 2025-01-06
- Certified
- 2025-01-06
Frequently asked questions
- What is William Willoughby's NPI number?
- William Willoughby's National Provider Identifier (NPI) is 1922526458, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Willoughby's specialty?
- William Willoughby is listed in the NPPES registry with a primary specialty of Mental Health Counselor (Behavioral Health & Social Service Providers).
- Where is William Willoughby located?
- William Willoughby's practice location on file with NPPES is 58 Waverley St Apt 1, Belmont, MA 02478-1960.
- What is William Willoughby's phone number?
- The practice phone number listed in the NPPES registry for William Willoughby is (843) 693-5852.
- Does William Willoughby accept Medicare?
- William Willoughby is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Willoughby's NPI active?
- Yes — William Willoughby's NPI (1922526458) is active in the NPPES registry as of the last update on 2025-01-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.