Data from the NPPES registry. May not reflect recent changes — verify at nppes.cms.hhs.gov.
WILLIAM CHARLES O'CALLAHAN JR., MD
ActiveWILLIAM CHARLES O'CALLAHAN JR., MD is a Emergency Medicine healthcare provider located in HOLDEN, Massachusetts. NPI 1114964186 is currently active in the NPPES registry. Verify at CMS.
Emergency Medicine · HOLDEN, MA
Registration Details
- NPI Number
- 1114964186
- Provider Type
- Individual
- Gender
- Male
- NPI Issued
- May 31, 2006 (20.191155717954 yrs)
- Last Updated
- Jan 21, 2025
- License
-
79001 (MA)
Practice Information
- Address
-
5 SHREWSBURY ST STE DHOLDEN, MA, 015201960Browse MA providers · Browse ZIP 01520
- Phone
- 5088293800
- Fax
- 5088293802
- Primary Specialty
-
Emergency Medicine
207P00000X
Other Emergency Medicine Providers in HOLDEN, MA
| Name | Credential | NPI |
|---|---|---|
| DR. PETER W RUGG | MD | 1508856121 |
| DR. RICHARD JULIEN FRENIERE | DO | 1023008745 |
| DR. DONALD P JACKEL | DO | 1497745160 |
| ROCK H. JEAN-GUILLAUME | D.O. | 1730157918 |
| DR. ALLISON NOURIELLE DARVISH | DO | 1588952451 |
Data sourced from the NPPES National Provider Identifier registry. This information is for informational purposes only and is not a substitute for verifying credentials with the appropriate licensing authority. For official verification, use the NPPES NPI Registry or the relevant state medical board.