Provider Profile
Martha S. Klassen, PsyD, BCBA
Unclaimed ProfileAbout Dr. Klassen
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Education & Training
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (714) 490-3428
- Email not available
Practice Locations
5212 KATELLA AVE STE 104
Los Alamitos, CA 90720
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other psychologists at this location 2
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 8
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 3
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 22 related providers in 3 groups
Other psychologists in Los Alamitos 6
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2010 at Other 8
Providers who graduated from the same medical school in the same year.
Common questions
What does Dr. Klassen specialize in?
Dr. Klassen is a psychologist in Los Alamitos, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Psychologist — Clinical”.
NPI registry
Where is Dr. Klassen located?
Dr. Klassen is listed at 5212 Katella Ave Ste 104, Los Alamitos, CA 90720. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Klassen's phone number?
The number on file is (714) 490-3428. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Klassen's NPI number?
Dr. Klassen's National Provider Identifier is 1700135548. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Klassen go to medical school?
Dr. Klassen attended Other, graduating in 2010. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Klassen been practicing?
Dr. Klassen has 16 years experience. Calculated from a graduation year of 2010, reported in the CMS National Downloadable File.
CMS public data
Has Dr. Klassen confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Klassen. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.