Robert S. Callahan, M.D., P.A.
Robert S. Callahan, M.D., P.A. is a healthcare organization registered as Family Medicine Physician in Newark, DE, holding Type 2 (organization) NPI 1992841019 since 2007. The authorized official on file is Robert Callahan, Owner.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1992841019 |
|---|---|
| Entity type | Organization (Type 2) |
| Legal business name | Robert S. Callahan, M.D., P.A. |
| Practice address | 665 CHURCHMANS RD, Newark, DE, 19702 |
| Phone | 3027310942 |
| Fax | 3027317100 |
| Enumeration date | 2007-01-29 |
| Last updated in NPPES | 2007-10-29 |
Authorized official
| Name | Robert Callahan |
|---|---|
| Title | Owner |
| Phone | 3027310942 |
Taxonomy & classification
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 207Q00000X | Family Medicine Physician | Primary | C1-0008123 | DE |
Copy-ready billing details
Provider: Robert S. Callahan, M.D., P.A. NPI: 1992841019 Taxonomy: 207Q00000X (Family Medicine Physician) Address: 665 CHURCHMANS RD, Newark, DE, 19702
Providers at this address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1902834997 | Anne Walton | Individual | Family Medicine Physician | Newark, DE |
| 1598796286 | William Funk | Individual | Family Medicine Physician | Newark, DE |
| 1205013661 | Anne N. Walton, M.D., PA | Organization | Family Medicine Physician | Newark, DE |
| 1841478757 | William B. Funk, M.D., PA | Organization | Family Medicine Physician | Newark, DE |
| 1316194616 | Huy M. Le, D.O., PA | Organization | Family Medicine Physician | Newark, DE |
| 1942533427 | Jessica Casale | Individual | Family Nurse Practitioner | Newark, DE |
| 1194293399 | Kelsey Doyle | Individual | Family Nurse Practitioner | Newark, DE |
| 1689492365 | Jennifer Briody | Individual | Physician Assistant | Newark, DE |
Verify this record
Cross-check NPI 1992841019 against the authoritative CMS record: view Robert S. Callahan, M.D., P.A. 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
What type of organization is Robert S. Callahan, M.D., P.A.?
What is a Type 2 NPI?
Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2007-10-29.