Mark Thalheimer, MSW
NPI 1245381508 · Mental Health Counselor · Wilmington, DE
Mark Thalheimer, MSW is a Mental Health Counselor provider in Wilmington, DE (NPI 1245381508).
Provider details
- NPI number
- 1245381508
- Entity type
- Individual
- Primary specialty
- Mental Health CounselorBehavioral Health & Social Service Providers
- Credential
- MSW
- Sex
- Male
- Sole proprietor
- No
- License
- Q1-0000617 (DE)
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
19 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
- 2007-01-15
- Last updated
- 2012-01-19
Frequently asked questions
- What is Mark Thalheimer's NPI number?
- Mark Thalheimer's National Provider Identifier (NPI) is 1245381508, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Thalheimer's specialty?
- Mark Thalheimer is listed in the NPPES registry with a primary specialty of Mental Health Counselor (Behavioral Health & Social Service Providers).
- Where is Mark Thalheimer located?
- Mark Thalheimer's practice location on file with NPPES is 500 W 10th St, Wilmington, DE 19801-1422.
- What is Mark Thalheimer's phone number?
- The practice phone number listed in the NPPES registry for Mark Thalheimer is (302) 984-3380.
- Is Mark Thalheimer's NPI active?
- Yes — Mark Thalheimer's NPI (1245381508) is active in the NPPES registry as of the last update on 2012-01-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.