Marissa O'Connor
NPI 1386286896 · Social Worker · Deer Park, NY
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marissa O'Connor is a Social Worker provider in Deer Park, NY (NPI 1386286896).
Provider details
- NPI number
- 1386286896
- Entity type
- Individual
- Primary specialty
- Social WorkerBehavioral Health & Social Service Providers
- Sex
- Female
- Sole proprietor
- Yes
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
6 yrs in NPPES registry
- Profile completeness38% of score
83% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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
Additional practice locations (1)
- 30 Tremont RdLindenhurst, NY 11757-1734Phone: (516) 361-3576
Registry dates
- Enumerated
- 2019-10-16
- Last updated
- 2019-10-16
Frequently asked questions
- What is Marissa O'Connor's NPI number?
- Marissa O'Connor's National Provider Identifier (NPI) is 1386286896, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marissa O'Connor's specialty?
- Marissa O'Connor is listed in the NPPES registry with a primary specialty of Social Worker (Behavioral Health & Social Service Providers).
- Where is Marissa O'Connor located?
- Marissa O'Connor's practice location on file with NPPES is 770 Grand Blvd Ste 17, Deer Park, NY 11729-5725.
- What is Marissa O'Connor's phone number?
- The practice phone number listed in the NPPES registry for Marissa O'Connor is (516) 361-3576.
- Does Marissa O'Connor accept Medicare?
- Marissa O'Connor is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marissa O'Connor's NPI active?
- Yes — Marissa O'Connor's NPI (1386286896) is active in the NPPES registry as of the last update on 2019-10-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.