Mark Shelford, MSW
NPI 1649496779 · Clinical Social Worker · Littleton, MA
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Shelford, MSW is a Clinical Social Worker provider in Littleton, MA (NPI 1649496779).
Provider details
- NPI number
- 1649496779
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- MSW
- Sex
- Male
- Sole proprietor
- Yes
- License
- 1025086 (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
19 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
- 2007-04-17
- Last updated
- 2007-07-08
Frequently asked questions
- What is Mark Shelford's NPI number?
- Mark Shelford's National Provider Identifier (NPI) is 1649496779, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Shelford's specialty?
- Mark Shelford is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Mark Shelford located?
- Mark Shelford's practice location on file with NPPES is 15 Cricket Ln, Littleton, MA 01460-1109.
- What is Mark Shelford's phone number?
- The practice phone number listed in the NPPES registry for Mark Shelford is (978) 339-5750.
- Does Mark Shelford accept Medicare?
- Mark Shelford is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Shelford's NPI active?
- Yes — Mark Shelford's NPI (1649496779) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.