M.W.D., Inc
M.W.D., Inc is a healthcare organization registered as Internal Medicine Physician in Riverhead, NY, holding Type 2 (organization) NPI 1639201569 since 2007. The authorized official on file is Michael Dempsey, Owner.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1639201569 |
|---|---|
| Entity type | Organization (Type 2) |
| Legal business name | M.W.D., Inc |
| Practice address | 1190 OLD COUNTRY RD, Riverhead, NY, 11901 |
| Phone | 6317271818 |
| Fax | 6317277365 |
| Enumeration date | 2007-03-09 |
| Last updated in NPPES | 2011-12-28 |
Authorized official
| Name | Michael Dempsey |
|---|---|
| Title | Owner |
| Phone | 6317271818 |
Taxonomy & classification
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 207R00000X | Internal Medicine Physician | Primary | — | — |
Copy-ready billing details
Provider: M.W.D., Inc NPI: 1639201569 Taxonomy: 207R00000X (Internal Medicine Physician) Address: 1190 OLD COUNTRY RD, Riverhead, NY, 11901
Providers at this address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1770508079 | Michael Dempsey | Individual | Internal Medicine Physician | Riverhead, NY |
| 1861512485 | Janet Baldasare | Individual | Adult Health Nurse Practitioner | Riverhead, NY |
Verify this record
Cross-check NPI 1639201569 against the authoritative CMS record: view M.W.D., Inc 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 M.W.D., Inc located?
Source: CMS NPPES (public data). Snapshot 2026-07-10. Provider record last updated 2011-12-28.