Cynthia Plotts, PHD
Cynthia Plotts, PHD is a Psychologist in San Marcos, TX, registered under NPI 1003441247. NPPES records them as a sole proprietor, meaning the practice is not incorporated as a separate legal entity.
Getting there
Here is what surrounds this office in San Marcos, based on OpenStreetMap data collected Sep 27, 2026. Parking is available about 0.34 mi away at Woods Street Garage (WSG). The nearest transit stop is 0.30 mi away, served by North Guadalupe & Woods. A pharmacy sits 0.30 mi from the entrance (B&J Pharmacy), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 568 ft away.
Getting here and what is nearby
Pharmacy H-E-B Pharmacy 402 ft ~2 min
Restaurant Schlotzsky's 417 ft ~2 min
Restaurant Root Cellar 432 ft ~2 min
Grocery H-E-B 482 ft ~2 min
Coffee The Coffee Shop 551 ft ~3 min
142 North LBJ Drive, San Marcos 78666
Coffee Babe's Doughnut and Coffee 563 ft ~3 min
214 North LBJ Drive, San Marcos 78666
Mo off; Tu-Th 08:00-13:00; Fr-Su 08:00-15:00
Coffee Tantra Coffee House 568 ft ~3 min
Restaurant Cafe on the Square 579 ft ~3 min
126 North LBJ Drive, San Marcos 78666
Gas station Valero 951 ft ~4 min
Convenience The Yellow Store 978 ft ~4 min
301 East Hopkins Street, San Marcos 78666
Hotel Crystal River Inn 0.20 mi ~5 min
Parking Edward Gary Street Garage 0.22 mi ~5 min
405 North Edward Gary Street, San Marcos 78666
Transit Tower 0.26 mi ~6 min
Convenience Sac N Pac 0.27 mi ~6 min
204 Moore Street, San Marcos 78666
Gas station Valero 0.27 mi ~6 min
Parking Tower Garage (106) 0.28 mi ~6 min
507 North Guadalupe Street, San Marcos 78666
Transit North Guadalupe & Woods 0.30 mi ~7 min
Pharmacy B&J Pharmacy 0.30 mi ~6 min
Parking Woods Street Garage (WSG) 0.34 mi ~7 min
220 West Woods Street, San Marcos 78666
Distances are straight‑line estimates — walking routes may be longer. Hours and phone numbers can change; call ahead to confirm.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| 23618 | TX | Psychologist primary |
This provider holds licence 23618 issued in TX. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
This NPI does not appear in the PECOS Medicare enrolment file. Providers who do not bill Medicare — or who bill only through a group's enrolment — will not appear here. It is not a sign of any problem with the registration.
What Psychologist covers
A 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, methods, and procedures, for the purpose of preventing or eliminating symptomatic, maladaptive, or undesired behavior and of enhancing interpersonal relationships, work and life adjustment, personal effectiveness, behavioral health, and mental health. The practice of psychology includes, but is not limited to, psychological testing and the evaluation or assessment of personal characteristics, such as intelligence, personality, abilities, interests, aptitudes, and neuropsychological functioning; counseling, psychoanalysis, psychotherapy, hypnosis, biofeedback, and behavior analysis and therapy; diagnosis and treatment of mental and emotional disorder or disability, alcoholism and substance abuse, disorders of habit or conduct, as well as of the psychological aspects of physical illness, accident, injury, or disability; and psycheducational evaluation, therapy, remediation, and consultation. Psychological services may be rendered to individuals, families, groups and the public. NUCC Health Care Provider Taxonomy, code 103T00000X
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.
| NPI | 1003441247 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Mar 9, 2020 |
| Last updated | Mar 9, 2020 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Female |
| Credential | PHD |
| Practice address |
120 W HOPKINS ST STE 102C San Marcos, TX 78666 (512) 781-9246 Fax (512) 852-4736 |
| Mailing address |
604 APPALOOSA DR Fischer, TX 78623 |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 0 | 0 | 3 | 4 | 4 | 1 | 2 | 4 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 8 | 4 | 2 | 2 | 8 |
Sum = 53 · next multiple of 10 = 60 · check digit = 7 · actual last digit = 7
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.