Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. Martha Sue Klassen, PSYD, BCBA

Individual provider Behavior Analyst · NPI 1700135548

Dr. Martha Sue Klassen, PSYD, BCBA is a Clinical Psychologist in Los Alamitos, California. Qualified in 2010, 16 years ago. Practices with Jodie Knott, PHD Psychological Consulting, Inc, a 2-clinician group, accepts Medicare assignment and offers telehealth. Licensed in California.

Years since qualifying
16
Licensed in
CA
In the registry since
2012
Specialties on file
2
What do these letters mean?
PSYD — Doctor of Psychology
A doctoral psychologist trained primarily for clinical practice.
BCBA — Board Certified Behavior Analyst
Designs and supervises applied behaviour analysis programmes, often for autism.

See every abbreviation used in this directory →

Practice location Address checks out

5212 Katella Ave Ste 104
Los Alamitos, CA 90720-6829
Phone: (714) 490-3428
Fax: (562) 493-1684
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Clinical Psychologist (primary) Taxonomy 103TC0700X · Licence PSY29865 (CA)
Behavior Analyst Taxonomy 103K00000X

Record details

NPI number1700135548
Entity typeIndividual (Type 1)
GenderFemale
Credentials PSYD , BCBA
Sole proprietorNo
NPI enumeratedSeptember 7, 2012
Last updated in NPPESMarch 21, 2025
Certification dateMarch 21, 2025

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCLINICAL PSYCHOLOGIST
Medical schoolOTHER
Graduated 2010 (16 years in practice)
Group practice Jodie Knott, Phd Psychological Consulting, Inc — 2 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

Other providers in Los Alamitos