DR. DIANA PATRICIA KETTERMAN PH.D.
NPI 1811487937
Psychologist in Alta Loma, CA

Active since May 14, 2018PECOS EnrolledAccepts Medicare Assignment
5033 CARRIAGE RD, ALTA LOMA, CA 91737(909) 732-6224(909) 980-4789 Get Directions Write a Review

NPPES record last updated: September 23, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Nov 15, 2022, Jun 19, 2019, Jun 16, 2018 and 1 more (4 updates tracked since 2018).

About Dr. Diana Patricia Ketterman Ph.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. DIANA PATRICIA KETTERMAN PH.D. (NPI 1811487937) is an individual psychologist in Alta Loma, California, licensed in California (33769) and active in the NPI registry since May 2018. She is enrolled in Medicare PECOS and is a graduate of Other (1989).

NPPES Registry Identity

NPI1811487937
Entity TypeIndividualFemale
Primary Taxonomy103T00000X
Provider Legal NameDR. DIANA PATRICIA KETTERMANCredential: PH.D.
Location Address5033 CARRIAGE RDAlta Loma, CA 91737-1685
Mailing Address5033 Carriage RdAlta Loma, CA 91737-1685 · (909) 732-6224 · Fax (909) 466-7867
Fax(909) 980-4789
Sole ProprietorYes
Medical School CMSOtherGraduated 1989
Enumeration DateMay 14, 2018
Last NPPES UpdateSeptember 23, 20254 updates tracked since enumeration
NPPES CertifiedSeptember 23, 2025
✔ NPI 1811487937 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPsychologistBehavioral Health & Social Service Providers
Taxonomy Code103T00000X
License✔ Licensed in CA · 33769
Definition
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.
Also ListedPsychologist · SchoolTaxonomy 103TS0200X · License 2551 (CA)
5033 CARRIAGE RD, Alta Loma, CA 91737

Other Names 1

Professional Name (2)Dr. Diana P. Ketterman-najera Ph.d.

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. Diana Patricia Ketterman Ph.d. 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.

PECOS PAC ID5597257915
PECOS Enrollment IDI20251124001382
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment– Home Health Agency– Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Diana Ketterman reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Addiction Medicine
4633 OLD IRONSIDES DR STE 304
Santa Clara, CA 95054
  • Reassigned Medicare billing, California enrollment
  • 1,607 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.

Other Providers at the Same Location NPPES

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

Psychologist
5033 CARRIAGE RD
RANCHO CUCAMONGA, CA 91737

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 Diana Ketterman's NPI number?

The NPI number for Diana Ketterman is 1811487937. It was assigned to this individual provider in the NPPES registry on May 14, 2018. The provider is also known as Dr. Diana P. Ketterman-Najera Ph.D..

Where is Diana Ketterman located?

Diana Ketterman practices at 5033 Carriage Rd, Alta Loma, CA 91737. The listed phone number is (909) 732-6224.

What is Diana Ketterman's specialty?

The primary specialty registered for this NPI is Psychologist with taxonomy code 103T00000X.

Is Diana Ketterman enrolled in Medicare?

Yes. Diana Ketterman 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 Diana Ketterman's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Diana Ketterman reassigns Medicare benefits to Sud Specialty Group - Ca (Santa Clara, 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 Diana Ketterman'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 Diana Ketterman was last updated on September 23, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.