JOHN T. MATHER MEMORIAL HOSPITAL
NPI 1467249334
Internal Medicine - Critical Care Medicine in Port Jefferson, NY
NPI Status: Active since April 23, 2025
Contact Information
75 N COUNTRY RD
PORT JEFFERSON, NY
ZIP 11777
Phone: (631) 473-1320
Fax: (631) 686-7972
- Organization
- Internal Medicine
- Critical Care Medicine
About JOHN T. MATHER MEMORIAL HOSPITAL
This page provides the complete NPI Profile along with additional information for John T. Mather Memorial Hospital, an internist established in Port Jefferson, New York operating as a Internal Medicine, focusing in critical care medicine . The healthcare provider is registered in the NPI registry with number 1467249334 assigned on April 2025. The practitioner's primary taxonomy code is 207RC0200X. The provider is registered as an organization and their NPI record was last updated one year ago. John T. Mather Memorial Hospital operates as a Multi-Specialty Group with one or more individual practitioners, who practice different areas of specialization. The authorized official of this NPI record is Christine Livreri (Avp)
- NPI
- 1467249334
- Provider Name
- JOHN T. MATHER MEMORIAL HOSPITAL
- Entity Type
- Organization
- Location Address
- 75 N COUNTRY RD PORT JEFFERSON, NY 11777
- Location Phone
- (631) 473-1320
- Location Fax
- (631) 686-7972
- Mailing Address
- 75 N COUNTRY RD PORT JEFFERSON, NY 11777
- Mailing Phone
- (631) 473-1320
- Mailing Fax
- (631) 686-7972
- Is Sole Proprietor?
- No
- Is Organization Subpart?
- No
- Enumeration Date
- 04-23-2025
- Last Update Date
- 04-23-2025
- Code Navigator
An internist like John T. Mather Memorial Hospital is a physician who has completed an internal medicine residency and is board-certified or board-eligible in an internist specialty. Internists are trained to care for adults of all ages for many different medical conditions. An internist typically monitors chronic physical conditions, identifies acute diseases, provides family planning, provides counseling about wellness and disease prevention, etc.
Location Map
Secondary Locations
- 125 Oakland Ave Ste 301
Port Jefferson, NY 11777
(631) 473-1320 - 70 N Country Rd Ste 302
Port Jefferson, NY 11777
(631) 473-1320 - 200 Belle Terre Rd
Port Jefferson, NY 11777
(631) 473-1320 - 500 Commack Rd Bldg E Suite 150D
Commack, NY 11725
(631) 473-1320 - 5225 Nesconset Hwy
Port Jefferson Station, NY 11776
(631) 473-1320 - 625 Belle Terre Rd Ste 204
Port Jefferson, NY 11777
(631) 473-1320 - 125 Oakland Ave Ste 303
Port Jefferson, NY 11777
(631) 473-1320 - 100 Highlands Blvd Ste 101
Port Jefferson, NY 11777
(631) 473-1320 - 100 Highlands Blvd Ste 201
Port Jefferson, NY 11777
(631) 473-1320 - 100 Highlands Blvd Ste 303
Port Jefferson, NY 11777
(631) 473-1320 - 170 N Country Rd Ste 3
Port Jefferson, NY 11777
(631) 473-1320 - 70 N Country Rd Ste 205
Port Jefferson, NY 11777
(631) 473-1320 - 625 Belle Terre Rd Ste 113
Port Jefferson, NY 11777
(631) 473-1320
Specialty - Primary Taxonomy
The NPI enumerator requires providers to submit at least one taxonomy code. A taxonomy code is a unique 10-character code that describes the healthcare provider type, classification, and the area of specialization. There could be only one primary taxonomy code per NPI record. For individual NPIs the license data is associated to the taxonomy code.
- Classification
Internal Medicine Critical Care Medicine
- Taxonomy Code
- 207RC0200X
- Type
- Allopathic & Osteopathic Physicians
- Taxonomy Description
- An internist who diagnoses, treats and supports patients with multiple organ dysfunction. This specialist may have administrative responsibilities for intensive care units and may also facilitate and coordinate patient care among the primary physician, the critical care staff and other specialists.
Group Taxonomy 193200000X MULTI-SPECIALTY GROUP
This provider is a business group of one or more individual practitioners, who practice with different areas of specialization.
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NPI NPI Number Validation
How NPI Validation Works
The NPI validation process uses the ISO-standard Luhn algorithm, a mathematical "handshake", to ensure that a provider's 10-digit ID is authentic and free of common typing errors.
To verify the NPI 1467249334, we treat the final digit (4) as the Check Digit—the target answer we need to reach. The process begins by taking the first nine digits and adding a constant value of 24, which accounts for the "80840" prefix required for all U.S. health identifiers. We then double every other digit starting from the right and sum the individual digits of those results together. For this specific NPI, that total comes to 66. The final step is to find the difference between that total and the next multiple of ten (70 - 66 = 4).
Digit-by-digit view
Use the first nine digits for the calculation. Starting from the right, double every other digit. The last digit is the check digit and is not part of the calculation.
Step 1: Double every other digit from the right
Starting with the rightmost digit of the first nine digits, double every other value. If doubling creates a two-digit number, add those digits together.
Step 2: Add all digits plus the NPI constant
Add the transformed values, the unchanged digits, and the constant 24.
Step 3: Find the amount needed to reach the next multiple of 10
The next multiple of ten after 66 is 70. The difference is the calculated check digit.
Other Providers at the Same Location
The following 20 providers are registered at the same or a nearby location.
PORT JEFFERSON, NY 11777
PORT JEFFERSON, NY 11777
PORT JEFFERSON, NY 11777
PORT JEFFERSON, NY 11777
PORT JEFFERSON, NY 11777
PORT JEFFERSON, NY 11777
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1467249334, enumerated as an "organization" on April 23, 2025.
The provider is located at 75 N COUNTRY RD PORT JEFFERSON, NY 11777 and the phone number is (631) 473-1320.
Internal Medicine with taxonomy code 207RC0200X and a focus in Critical Care Medicine.
