Mark Ellis, LMSW
NPI 1336401710 · Clinical Social Worker · Twin Falls, ID
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Ellis, LMSW is a Clinical Social Worker provider in Twin Falls, ID (NPI 1336401710).
Provider details
- NPI number
- 1336401710
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LMSW
- Sex
- Male
- Sole proprietor
- No
- License
- LCSW-32484 (ID)
Specialties & taxonomies
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
14 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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
Registry dates
- Enumerated
- 2012-06-12
- Last updated
- 2013-12-04
Frequently asked questions
- What is Mark Ellis's NPI number?
- Mark Ellis's National Provider Identifier (NPI) is 1336401710, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Ellis's specialty?
- Mark Ellis is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Mark Ellis located?
- Mark Ellis's practice location on file with NPPES is 1418 Fillmore St, Twin Falls, ID 83301-3380.
- What is Mark Ellis's phone number?
- The practice phone number listed in the NPPES registry for Mark Ellis is (208) 735-2237.
- Does Mark Ellis accept Medicare?
- Mark Ellis is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Ellis's NPI active?
- Yes — Mark Ellis's NPI (1336401710) is active in the NPPES registry as of the last update on 2013-12-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.