Data from the NPPES registry. May not reflect recent changes — verify at nppes.cms.hhs.gov.
DR. ALLAN DOUGLAS SIEFKIN, MD
ActiveDR. ALLAN DOUGLAS SIEFKIN, MD is a Internal Medicine healthcare provider located in SACRAMENTO, California. NPI 1033113758 is currently active in the NPPES registry. Verify at CMS.
Internal Medicine · SACRAMENTO, CA
Registration Details
- NPI Number
- 1033113758
- Provider Type
- Individual
- Gender
- Male
- NPI Issued
- Jun 9, 2005 (21.145027605043 yrs)
- Last Updated
- Sep 11, 2025
- Licenses
-
G032410 (CA)G032410 (CA)G032410 (CA)
Practice Information
- Address
-
2315 STOCKTON BLVDSACRAMENTO, CA, 958172201Browse CA providers · Browse ZIP 95817
- Phone
- 9167341166
- Fax
- 9167343234
- Primary Specialty
-
Internal Medicine
207R00000X
- Additional Specialty
- Critical Care Medicine
- Additional Specialty
- Pulmonary Disease
Other Internal Medicine Providers in SACRAMENTO, CA
| Name | Credential | NPI |
|---|---|---|
| CHARLES SCOTT HARROD | M.D. | 1669471868 |
| DR. HUNG-ANH BA NGUYEN | MD | 1871594036 |
| DR. MEGHAN ELIZABETH HAYES | M.D. | 1851385405 |
| JAMES ROGER JACKSON JR. | MD | 1508855594 |
| DR. BAYARD WON CHANG | M.D. | 1104816255 |
| DR. PATRICK SCOTT ROMANO | MD, MPH | 1386625986 |
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.