Matthew Siekkinen, LCSW
NPI 1003308768 · Clinical Social Worker · Greencastle, IN
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Matthew Siekkinen, LCSW is a Clinical Social Worker provider in Greencastle, IN (NPI 1003308768).
Provider details
- NPI number
- 1003308768
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW
- Sex
- Male
- Sole proprietor
- No
- License
- 34012446A (IN)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
8 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Additional practice locations (1)
- 2401 W University Ave Fl 3Muncie, IN 47303-3428Phone: (765) 751-1701
Registry dates
- Enumerated
- 2018-05-30
- Last updated
- 2025-12-08
- Certified
- 2025-12-08
Frequently asked questions
- What is Matthew Siekkinen's NPI number?
- Matthew Siekkinen's National Provider Identifier (NPI) is 1003308768, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Matthew Siekkinen's specialty?
- Matthew Siekkinen is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Matthew Siekkinen located?
- Matthew Siekkinen's practice location on file with NPPES is 239 Hillsdale Ave, Greencastle, IN 46135-1340.
- What is Matthew Siekkinen's phone number?
- The practice phone number listed in the NPPES registry for Matthew Siekkinen is (765) 653-1024.
- Does Matthew Siekkinen accept Medicare?
- Matthew Siekkinen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Matthew Siekkinen's NPI active?
- Yes — Matthew Siekkinen's NPI (1003308768) is active in the NPPES registry as of the last update on 2025-12-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.