Mark Simpson, PH.D.
NPI 1285757013 · Clinical Psychologist · Johnson City, TN
Mark Simpson, PH.D. is a Clinical Psychologist provider in Johnson City, TN (NPI 1285757013).
Provider details
- NPI number
- 1285757013
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PH.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 3205 (TN)
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
19 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)
- 119 Boone Ridge DrSuite 201Johnson City, TN 37615-4998Phone: (865) 673-6741Fax: (865) 673-6634
Registry dates
- Enumerated
- 2007-04-08
- Last updated
- 2018-06-25
Frequently asked questions
- What is Mark Simpson's NPI number?
- Mark Simpson's National Provider Identifier (NPI) is 1285757013, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Simpson's specialty?
- Mark Simpson is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is Mark Simpson located?
- Mark Simpson's practice location on file with NPPES is 119 Boone Ridge Dr, Johnson City, TN 37615.
- What is Mark Simpson's phone number?
- The practice phone number listed in the NPPES registry for Mark Simpson is (865) 673-6741.
- Is Mark Simpson's NPI active?
- Yes — Mark Simpson's NPI (1285757013) is active in the NPPES registry as of the last update on 2018-06-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.