South Island Family Medical, LLC
NPI 1306954292 · Family Medicine Physician · Island Park, NY
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
South Island Family Medical, LLC is a Family Medicine Physician organization in Island Park, NY (NPI 1306954292).
Provider details
- NPI number
- 1306954292
- Entity type
- Organization
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Carolyn Castiglia, President(516) 670-8800
- License
- 210382 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
Other names (DBA / former)
- Doing business as
- South Island Medical
Registry dates
- Enumerated
- 2006-08-29
- Last updated
- 2008-03-18
Frequently asked questions
- What is South Island Family Medical, LLC's NPI number?
- South Island Family Medical, LLC's National Provider Identifier (NPI) is 1306954292, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is South Island Family Medical, LLC?
- South Island Family Medical, LLC is classified in the NPPES registry as Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is South Island Family Medical, LLC located?
- South Island Family Medical, LLC's practice location on file with NPPES is 4042a Austin Blvd, Island Park, NY 11558-1226.
- What is South Island Family Medical, LLC's phone number?
- The practice phone number listed in the NPPES registry for South Island Family Medical, LLC is (516) 670-8800.
- Does South Island Family Medical, LLC accept Medicare?
- South Island Family Medical, LLC is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for South Island Family Medical, LLC?
- The authorized official listed on South Island Family Medical, LLC's NPPES record is Carolyn Castiglia, President. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is South Island Family Medical, LLC's NPI active?
- Yes — South Island Family Medical, LLC's NPI (1306954292) is active in the NPPES registry as of the last update on 2008-03-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.