Jon Brennan, R-LCSW
NPI 1659863868 · Mental Health Counselor · Center Moriches, NY
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jon Brennan, R-LCSW is a Mental Health Counselor provider in Center Moriches, NY (NPI 1659863868).
Provider details
- NPI number
- 1659863868
- Entity type
- Individual
- Primary specialty
- Mental Health CounselorBehavioral Health & Social Service Providers
- Credential
- R-LCSW
- Sex
- Male
- Sole proprietor
- Yes
- License
- R044718-1 (NY)
Specialties & taxonomies
Behavioral Health & Social Service Providers
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
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)
- 900 Walt Whitman RdMelville, NY 11747-2293Phone: (516) 698-5511Fax: (516) 418-5377
Registry dates
- Enumerated
- 2018-06-04
- Last updated
- 2020-01-09
- Certified
- 2020-01-09
Frequently asked questions
- What is Jon Brennan's NPI number?
- Jon Brennan's National Provider Identifier (NPI) is 1659863868, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jon Brennan's specialty?
- Jon Brennan is listed in the NPPES registry with a primary specialty of Mental Health Counselor (Behavioral Health & Social Service Providers).
- Where is Jon Brennan located?
- Jon Brennan's practice location on file with NPPES is 408 Montauk Hwy, Center Moriches, NY 11934-3518.
- What is Jon Brennan's phone number?
- The practice phone number listed in the NPPES registry for Jon Brennan is (631) 874-0185.
- Does Jon Brennan accept Medicare?
- Jon Brennan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jon Brennan's NPI active?
- Yes — Jon Brennan's NPI (1659863868) is active in the NPPES registry as of the last update on 2020-01-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.