Daniel L Mayer MD PC
Daniel L Mayer MD PC is a healthcare organization registered as Internal Medicine Physician in Smithtown, NY, holding Type 2 (organization) NPI 1306858857 since 2006. The authorized official on file is Daniel Mayer, President.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1306858857 |
|---|---|
| Entity type | Organization (Type 2) |
| Legal business name | Daniel L Mayer MD PC |
| Practice address | 263 EAST MAIN STREET, Smithtown, NY, 11787 |
| Phone | 6313665252 |
| Fax | 6313664371 |
| Enumeration date | 2006-08-13 |
| Last updated in NPPES | 2007-10-29 |
Authorized official
| Name | Daniel Mayer |
|---|---|
| Title | President |
| Phone | 6313665252 |
Taxonomy & classification
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 207R00000X | Internal Medicine Physician | Primary | 1400451 | NY |
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 140045B10 | Other | NY | HEALTHFIRST |
| 72F301 | Other | NY | EMPIRE BC BS |
| 0748519 | Other | NY | AETNA |
| 6C5498 | Other | NY | HEALTHNET |
| CP039 | Other | NY | OXFORD HEALTH PLANS |
| 2238 | Other | NY | VYTRA HEALTH PLANS |
| 00603338 | Medicaid | NY | — |
| 26823P | Other | NY | HIP |
Copy-ready billing details
Provider: Daniel L Mayer MD PC NPI: 1306858857 Taxonomy: 207R00000X (Internal Medicine Physician) Address: 263 EAST MAIN STREET, Smithtown, NY, 11787
Providers at this address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1245273135 | Daniel Mayer | Individual | Pediatric Allergy/Immunology Physician | Smithtown, NY |
Verify this record
Cross-check NPI 1306858857 against the authoritative CMS record: view Daniel L Mayer 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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Where is Daniel L Mayer MD PC located?
Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2007-10-29.