William Maronn, LICSW
NPI 1003617119 · Clinical Social Worker · Lexington, MA
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Maronn, LICSW is a Clinical Social Worker provider in Lexington, MA (NPI 1003617119).
Provider details
- NPI number
- 1003617119
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LICSW
- Sex
- Male
- Sole proprietor
- Yes
- License
- LICSW1140764 (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
1 yr 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
- 2025-03-24
- Last updated
- 2025-06-02
- Certified
- 2025-06-02
Frequently asked questions
- What is William Maronn's NPI number?
- William Maronn's National Provider Identifier (NPI) is 1003617119, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Maronn's specialty?
- William Maronn is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is William Maronn located?
- William Maronn's practice location on file with NPPES is 76 Bedford St Ste 22, Lexington, MA 02420-4641.
- What is William Maronn's phone number?
- The practice phone number listed in the NPPES registry for William Maronn is (617) 866-0810.
- Does William Maronn accept Medicare?
- William Maronn is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Maronn's NPI active?
- Yes — William Maronn's NPI (1003617119) is active in the NPPES registry as of the last update on 2025-06-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.