William J Sieber, PH.D.

Clinical Psychologist

William J Sieber is a Clinical Psychologist based in San Diego, CA with over 42 years of clinical experience. Medicare-enrolled per CMS records and offers virtual telehealth visits.

(800) 926-8273San Diego, CA
Telehealth Available
NPI Active per CMS — Q2 2026|Medicare Enrolled|Order & Refer

With over 42 years in psychology, William J Sieber, PH.D. is a long-established clinical psychologist in San Diego. He has been practicing since 2007 — over 42 years. CMS Medicare data shows his patients commonly have anxiety, mood disorders, and hypertension.

1 of 1,069 Psychologist providers in CASee all Psychologist in San Diego42+ years experienceNPI since 2007

Older · 2664dNPPES updated 2019-02-05 · verify NPI on CMS · Verify license at Medical Board of California

Contact & Location

Practice Location

200 W Arbor Dr, San Diego, CA 92103-9000

CMS Clinical Data

How Does This Doctor Compare?

Medicare Patients

26

Unique beneficiaries

Boutique practice

Data Note: Sourced from CMS Medicare Provider Utilization & Payment Data. Percentile rankings compare this provider against all peers with reported data in the same state. Updated annually to reflect the latest federal reporting cycle.

Patient Condition Panel

What This Doctor Treats Most

Based on Medicare claims data — here's what patients commonly see this doctor for

Based on Medicare data, this doctor primarily manages Anxiety Disorders, Mood Disorders, and Hypertension.

Anxiety Disorders
73%

Excessive worry or fear that interferes with daily life

Mood Disorders
65%

Conditions affecting emotional state, including depression and bipolar disorder

Hypertension
62%

High blood pressure — a leading risk factor for heart disease and stroke

High Cholesterol
62%

Elevated cholesterol or triglycerides that increase heart disease risk

Arthritis
58%

Joint inflammation causing pain, swelling, and stiffness

GeneralBehavioralNational avg

Percentage of this provider's Medicare patients diagnosed with each condition. Source: CMS Utilization Data.

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Background & Specialty

Education, training, and specialty classification from CMS NPPES and Medicare records.

Career Journey
  1. 42 years in practice

    Senior practitioner

PsychologistBehavioral Health & Social Service Providers

A psychologist who provides continuing and comprehensive mental and behavioral health care for individuals and families; consultation to agencies and communities; training, education and supervision; and research-based practice. It is a specialty in breadth -- one that is broadly inclusive of severe psychopathology -- and marked by comprehensiveness and integration of knowledge and skill from a broad array of disciplines within and outside of psychology proper. The scope of clinical psychology encompasses all ages, multiple diversities and varied systems.

Taxonomy: 103TC0700X

Practice Footprint

Mailing address

Po Box 232410, San Diego, CA 92193-2410

Differs from practice location

Virtual Psychology Care With William J Sieber

NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.

Schedule a virtual visit with William J Sieber for anxiety counseling, mood disorder follow-ups, blood pressure monitoring — no travel to San Diego required. The office sends a secure video link before your appointment. Most visits take 15–30 minutes. Medicare enrolled per CMS records.

Frequently Asked Questions

Common questions about William J Sieber

Dr. Sieber is listed as active in the NPI registry with telehealth listed in San Diego, CA. NPI status alone doesn't confirm open availability — call the office to confirm. Phone: (800) 926-8273.

Verified across 3 federal data sources

Sourced from CMS NPPES · OIG LEIE · CMS Physician Comparator. See Data Methodology.

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Medical Disclaimer: NPI Telehealth is a provider directory for informational purposes only. This page does not constitute medical advice, diagnosis, or treatment recommendations. Provider data is sourced from the CMS NPPES federal registry and public Medicare datasets. NPI Telehealth does not verify clinical qualifications beyond federal records. Data may not reflect real-time availability — always contact the provider's office directly to confirm details before seeking care.

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