DR. MARTHA SUE KLASSEN PSYD, BCBA
NPI 1700135548
Psychologist - Clinical in Los Alamitos, CA
About Dr. Martha Sue Klassen Psyd, Bcba NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MARTHA SUE KLASSEN PSYD, BCBA (NPI 1700135548) is an individual clinical provider in Los Alamitos, California, licensed in California (PSY29865) and active in the NPI registry since September 2012. She is enrolled in Medicare PECOS and is a graduate of Other (2010).
NPPES Registry Identity
Specialties & Licenses 2
Other Names 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Martha Sue Klassen Psyd, Bcba is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show Martha Klassen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Los Alamitos, CA 90720
- Reassigned Medicare billing, California enrollment
- Medicare enrollment name: Jodie Knott, Phd Psychological Consulting, Inc
- 2 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 90720 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 4
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
LOS ALAMITOS, CA 90720
LOS ALAMITOS, CA 90720
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Martha Klassen's NPI number?
The NPI number for Martha Klassen is 1700135548. It was assigned to this individual provider in the NPPES registry on September 7, 2012. The provider is also known as Dr. Martha Sue Cook Klassen Psyd, Bcba.
Where is Martha Klassen located?
Martha Klassen practices at 5212 Katella Ave Ste 104, Los Alamitos, CA 90720. The listed phone number is (714) 490-3428.
What is Martha Klassen's specialty?
The primary specialty registered for this NPI is Psychologist, specializing in Clinical, with taxonomy code 103TC0700X.
Is Martha Klassen enrolled in Medicare?
Yes. Martha Klassen is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for Martha Klassen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Martha Klassen reassigns Medicare benefits to Jodie Knott, Ph.D., Psychological Consulting, Inc. (Los Alamitos, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Martha Klassen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Martha Klassen was last updated on March 21, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. Martha Sue Klassen, PSYD, BCBA · NPI 1700135548
Clinical provider in Los Alamitos, California. Individual provider, active in the CMS NPPES registry since September 7, 2012.
## Identity
- **NPI:** 1700135548 (Entity type: Individual)
- **Enumerated:** September 7, 2012
- **Primary specialty:** Psychologist - Clinical · taxonomy 103TC0700X
- **State license:** PSY29865 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 5212 KATELLA AVE STE 104, Los Alamitos, CA 90720-6829
- **Phone:** (714) 490-3428 · **Fax:** (562) 493-1684
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment
- **Bills Medicare through:** Jodie Knott, Ph.D., Psychological Consulting, Inc. (NPI 1063803393, Los Alamitos, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2010
## Record status
- **NPPES last updated:** March 21, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1700135548) · Data from the CMS NPPES public registry.