David Thomassen, MS, LGPC
NPI 1013338623 · Mental Health Counselor · Frederick, MD
David Thomassen, MS, LGPC is a Mental Health Counselor provider in Frederick, MD (NPI 1013338623).
Provider details
- NPI number
- 1013338623
- Entity type
- Individual
- Primary specialty
- Mental Health CounselorBehavioral Health & Social Service Providers
- Credential
- MS, LGPC
- Sex
- Male
- Sole proprietor
- Yes
- License
- LGP3782 (MD)
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
12 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
- 2013-12-27
- Last updated
- 2013-12-27
Frequently asked questions
- What is David Thomassen's NPI number?
- David Thomassen's National Provider Identifier (NPI) is 1013338623, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is David Thomassen's specialty?
- David Thomassen is listed in the NPPES registry with a primary specialty of Mental Health Counselor (Behavioral Health & Social Service Providers).
- Where is David Thomassen located?
- David Thomassen's practice location on file with NPPES is 309 E Patrick St, Frederick, MD 21701-5614.
- What is David Thomassen's phone number?
- The practice phone number listed in the NPPES registry for David Thomassen is (240) 578-2322.
- Is David Thomassen's NPI active?
- Yes — David Thomassen's NPI (1013338623) is active in the NPPES registry as of the last update on 2013-12-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.