Dr. Mark W Welsh, DDS
Dr. Mark W Welsh is a Dentist provider (Dentist) practicing in Ithaca, NY, registered in the NPPES registry with NPI 1104032713 since 2007. The credential DDS stands for Doctor of Dental Surgery. Practices at Collegetown Family Dental (listed at the same practice address in NPPES).
✓ Active NPI ✓ Valid NPI checksum Sole proprietor
| NPI | 1104032713 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Dr. Mark W Welsh |
| Credential | DDS |
| Sex | Male |
| Practice address | Ithaca, NY, 14850 |
| Phone | 6072721921 |
| Enumeration date | 2007-05-14 |
| Last updated in NPPES | 2007-07-08 |
Street address withheld — NPPES sole-proprietor addresses can be home addresses. See our data policy.
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 122300000X | Dentist | Primary | 051639 | NY |
DDS — Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS credential
Copy-ready billing details
Provider: Mark Welsh, DDS NPI: 1104032713 Taxonomy: 122300000X (Dentist) Address: Ithaca, NY, 14850
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1417151150 | Paul Hart | Individual | Dentist | Ithaca, NY |
| 1215200779 | Collegetown Family Dental | Organization | General Practice Dentistry | Ithaca, NY |
Verify this record
Cross-check NPI 1104032713 against the authoritative CMS record: view Dr. Mark W Welsh 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 2026-07-10. Provider record last updated 2007-07-08.