John T. Mather Memorial Hospital
NPI 1104913748 · Emergency Medicine Physician · Port Jefferson, NY
John T. Mather Memorial Hospital is a Emergency Medicine Physician organization in Port Jefferson, NY (NPI 1104913748).
Provider details
- NPI number
- 1104913748
- Entity type
- Organization
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Sharon Donnelly, Director(631) 686-7603
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
Registry dates
- Enumerated
- 2006-10-06
- Last updated
- 2015-05-19
Frequently asked questions
- What is John T. Mather Memorial Hospital's NPI number?
- John T. Mather Memorial Hospital's National Provider Identifier (NPI) is 1104913748, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is John T. Mather Memorial Hospital?
- John T. Mather Memorial Hospital is classified in the NPPES registry as Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John T. Mather Memorial Hospital located?
- John T. Mather Memorial Hospital's practice location on file with NPPES is 75 N Country Rd, Port Jefferson, NY 11777-2119.
- What is John T. Mather Memorial Hospital's phone number?
- The practice phone number listed in the NPPES registry for John T. Mather Memorial Hospital is (631) 473-1320.
- Who is the authorized official for John T. Mather Memorial Hospital?
- The authorized official listed on John T. Mather Memorial Hospital's NPPES record is Sharon Donnelly, Director. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is John T. Mather Memorial Hospital's NPI active?
- Yes — John T. Mather Memorial Hospital's NPI (1104913748) is active in the NPPES registry as of the last update on 2015-05-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.