Mark Koser MD PC
Mark Koser MD PC is a healthcare organization registered as Ophthalmology Physician in Staten Island, NY, holding Type 2 (organization) NPI 1376812396 since 2011. The authorized official on file is Mark Koser, President.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1376812396 |
|---|---|
| Entity type | Organization (Type 2) |
| Legal business name | Mark Koser MD PC |
| Practice address | 3611 RICHMOND AVE, Staten Island, NY, 10312 |
| Phone | 7189667200 |
| Fax | 7189669119 |
| Enumeration date | 2011-12-20 |
| Last updated in NPPES | 2011-12-20 |
Authorized official
| Name | Mark Koser |
|---|---|
| Title | President |
| Phone | 7189667200 |
Taxonomy & classification
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 207W00000X | Ophthalmology Physician | Primary | 169168 | NY |
Copy-ready billing details
Provider: Mark Koser MD PC NPI: 1376812396 Taxonomy: 207W00000X (Ophthalmology Physician) Address: 3611 RICHMOND AVE, Staten Island, NY, 10312
Providers at this address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1174668503 | Alan Alterman | Individual | Pediatric Dentistry | Staten Island, NY |
| 1376676791 | Drs. Alterman & Gerstman, Pllc | Organization | Pediatric Dentistry | Staten Island, NY |
| 1184833568 | Jonathan Gerstman | Individual | Dentist | Staten Island, NY |
| 1760990170 | Leah Cappelli | Individual | Counselor | Staten Island, NY |
Verify this record
Cross-check NPI 1376812396 against the authoritative CMS record: view Mark Koser MD PC on the official NPPES registry .
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes — even if the provider moves or changes specialty. Read the full guide or validate an NPI number.
Frequently asked questions
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Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2011-12-20.