NPI age
6 years
Enumerated 2020-01-23
● Active
Type 1 · Individual
DR. Mark David Shermis, PH.D.
Shermis is 1 of 22 psychologist providers in The Woodlands and 1 of 2632 in Texas.
Primary specialty
Psychologist
Plus 4 subspecialties
Licensed in
TX, OH, CA, FL, IN
5 states
Status
Active
No deactivations on record
Last NPPES update
2020-01-23
Source: monthly bulk 2026-05
Sole proprietor
Yes
Solo practice on file
How this provider compares
Across 2632 active psychologist providers in Texas.
NPI age
6 years
↓ 7 yr below median (13 yr)
State licenses
5 states
Top 95% — 4% of peers are multi-state
Subspecialties
0
24% of peers hold subspecialties
NPI lifetime · 2020 → 2026
2020-01Enumerated in NPPES
2020
2026
Where they practice
Practice location
14 S Braided Branch Dr
The Woodlands, TX 773750174
Mailing address
14 S Braided Branch Dr
The Woodlands, TX 773750174
Specialties
-
Psychologist PrimaryA psychologist is an individual who is licensed to practice psychology which is defined as the observation, description, evaluation, interpretation, and modification of human behavior by the application of psychological principles,...
Practice context
Solo or small practice. No other active providers share this practice address in NPPES. This provider is listed as a sole proprietor.
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