MR. RONALD EARL OFFENSTEIN PHD
NPI 1811091978
Psychologist in Riverside, CA

Active since September 11, 2006PECOS EnrolledAccepts Medicare Assignment
5887 BROCKTON AVE, SUITE A RIVERSIDE PSYCHIATRIC MEDICAL GROUP, RIVERSIDE, CA 92506(951) 275-8500(951) 275-8560 Get Directions Write a Review

NPPES record last updated: August 30, 2012. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Mr. Ronald Earl Offenstein Phd NPPES

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

MR. RONALD EARL OFFENSTEIN PHD (NPI 1811091978) is an individual psychologist in Riverside, California, licensed in California (PSY6287) and active in the NPI registry since September 2006. He is enrolled in Medicare PECOS and is a graduate of Other (1973).

NPPES Registry Identity

NPI1811091978
Entity TypeIndividualMale
Primary Taxonomy103T00000X
Provider Legal NameMR. RONALD EARL OFFENSTEINCredential: PHD
Location Address5887 BROCKTON AVE, SUITE A RIVERSIDE PSYCHIATRIC MEDICAL GROUPRiverside, CA 92506
Mailing Address5887 Brockton Ave, Suite ARiverside, CA 92506 · (951) 275-8500 · Fax (951) 275-8560
Fax(951) 275-8560
Sole ProprietorNo
Medical School CMSOtherGraduated 1973
Enumeration DateSeptember 11, 2006
Last NPPES UpdateAugust 30, 2012
✔ NPI 1811091978 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychologistBehavioral Health & Social Service Providers
Taxonomy Code103T00000X
License✔ Licensed in CA · PSY6287
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.
5887 BROCKTON AVE, Riverside, CA 92506

Other Identifiers 2

Medicare ID-Type Unspecified00PL62870CA
Medicare UPINR27502

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

Mr. Ronald Earl Offenstein Phd 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 ID4688866072
PECOS Enrollment IDI20121031000332
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 Ronald Offenstein reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Mental Health (Including Community Mental Health Center)
5887 BROCKTON AVE, STE A RIVERSIDE PSYCHIATRIC MEDICAL GROUP
Riverside, CA 92506
  • Reassigned Medicare billing, California enrollment
  • 12 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.

Areas of Expertise CMS Part B claims

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Psychotherapy, 45 minutes 90834
Psychotherapy is a treatment method where you converse with a therapist about your thoughts, feelings, and behaviors. In a 45-minute session, the therapist assists you in understanding and managing your mental health concerns, improving emotional wellness, and promoting personal growth.
378 services27 patients

Other Providers at the Same Location NPPES 18

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

Psychiatry & Neurology (Psychiatry)
5887 BROCKTON AVE, SUITE B
RIVERSIDE, CA 92506
Psychologist
5887 BROCKTON AVE, RIVERSIDE PSYCHIATRIC MEDICAL GROUP STE A
RIVERSIDE, CA 92506
Nurse Practitioner (Psychiatric/Mental Health)
5887 BROCKTON AVE
RIVERSIDE, CA 92506
Nurse Practitioner (Psychiatric/Mental Health)
5887 BROCKTON AVE
RIVERSIDE, CA 92506
Counselor (Mental Health)
5887 BROCKTON AVE
RIVERSIDE, CA 92506
Psychiatry & Neurology (Psychiatry)
5887 BROCKTON AVE, SUITE A RIVERSIDE PSYCHIATRIC MEDICAL GROUP
RIVERSIDE, CA 92506
Clinical Nurse Specialist (Psychiatric/Mental Health, Adult)
5887 BROCKTON AVE, SUITE A
RIVERSIDE, CA 92506
Physical Therapist
5887 BROCKTON AVE, SUITE B
RIVERSIDE, CA 92506

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 Ronald Offenstein's NPI number?

The NPI number for Ronald Offenstein is 1811091978. It was assigned to this individual provider in the NPPES registry on September 11, 2006.

Where is Ronald Offenstein located?

Ronald Offenstein practices at 5887 Brockton Ave Suite A Riverside Psychiatric Medical Group, Riverside, CA 92506. The listed phone number is (951) 275-8500.

What is Ronald Offenstein's specialty?

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

Is Ronald Offenstein enrolled in Medicare?

Yes. Ronald Offenstein 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 Ronald Offenstein's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Ronald Offenstein reassigns Medicare benefits to Riverside Psychiatric Medical Group (Riverside, 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 Ronald Offenstein'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 Ronald Offenstein was last updated on August 30, 2012. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 years 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.