IndividualActive
Kelli Mastellon, LMSW
NPI 1851560338 · Clinical Social Worker · Seaford, NY
Kelli Mastellon, LMSW is a Clinical Social Worker provider in Seaford, NY (NPI 1851560338).
Provider details
- NPI number
- 1851560338
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LMSW
- Sex
- Female
- Sole proprietor
- Yes
- License
- 075340-1 (NY)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Detailed profile(88/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
18 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
2146 Jackson Ave
Seaford, NY 11783-2606
Phone: (516) 221-3030
Fax: (516) 221-4160
Street-level locationGet directions
Mailing address
2146 Jackson Ave
Seaford, NY 11783-2606
Registry dates
- Enumerated
- 2008-02-28
- Last updated
- 2008-02-28
Frequently asked questions
- What is Kelli Mastellon's NPI number?
- Kelli Mastellon's National Provider Identifier (NPI) is 1851560338, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Kelli Mastellon's specialty?
- Kelli Mastellon is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Kelli Mastellon located?
- Kelli Mastellon's practice location on file with NPPES is 2146 Jackson Ave, Seaford, NY 11783-2606.
- What is Kelli Mastellon's phone number?
- The practice phone number listed in the NPPES registry for Kelli Mastellon is (516) 221-3030.
- Is Kelli Mastellon's NPI active?
- Yes — Kelli Mastellon's NPI (1851560338) is active in the NPPES registry as of the last update on 2008-02-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.