Data from the NPPES registry. May not reflect recent changes — verify at nppes.cms.hhs.gov.
MATTHEW J SIEKKINEN, LCSW
ActiveMATTHEW J SIEKKINEN, LCSW is a Clinical Social Worker healthcare provider located in GREENCASTLE, Indiana. NPI 1003308768 is currently active in the NPPES registry. Verify at CMS.
Clinical Social Worker · GREENCASTLE, IN
Registration Details
- NPI Number
- 1003308768
- Provider Type
- Individual
- Gender
- Male
- NPI Issued
- May 30, 2018 (8.1904967377154 yrs)
- Last Updated
- Dec 8, 2025
- Licenses
-
34012446A (IN)33007302A (IN)
Practice Information
- Address
-
239 HILLSDALE AVEGREENCASTLE, IN, 461351340Browse IN providers · Browse ZIP 46135
- Phone
- 7656531024
- Primary Specialty
-
Clinical Social Worker
1041C0700X
- Additional Specialty
- Social Worker
Other Clinical Social Worker Providers in GREENCASTLE, IN
| Name | Credential | NPI |
|---|---|---|
| ELIZABETH DELANEY | LCSW, LMFT | 1740248418 |
| MR. LARRY DALE SQUIRES | LCSW | 1083666143 |
| AMANDA LEWELLEN | MSW, LCSW | 1730132317 |
| MR. SAMUEL W. SPRANKLE | MSW, LCSW | 1811053838 |
| CORTNEY ANNE MILLER | LCSW, LCAC | 1619201498 |
| SYDNI BROWN | LCSW | 1003204736 |
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.