Logo
Profile last updated: March 2026How we source this data
WM
Provider Profile

William Matzner, M.D., PH.D.

Internal Medicine Physician

NPI: 1306905716

4.3

12 · Vitals

19

Years Exp.

Simi Valley

CA

Internal Medicine

Specialty

About

Dr. William Matzner, M.D., Ph.D., is an internal medicine physician based in Simi Valley, CA. He specializes in providing long-term, comprehensive care for adolescents, adults, and the elderly, managing both common and complex illnesses. His extensive training allows him to diagnose and treat a range of conditions affecting the heart, kidneys, respiratory system, and more.

With a patient rating of 3.5 out of 5 from three reviews, Dr. Matzner is recognized for his medical expertise and dedication to patient care. Feedback highlights his thoroughness in addressing medical issues and his commitment to providing personal attention to his patients. His approach is grounded in the principles of the Hippocratic oath, fostering a positive patient experience.

Dr. Matzner has years of experience in the field and offers office visits typically ranging from $80 to $250. His comprehensive approach to internal medicine encompasses disease prevention and wellness, ensuring that patients receive holistic care tailored to their needs.

Practicing Since

Dec 2006

Gender

Male

Experience

19 years

CA Medical License

#AO43053

Practice Type

Solo Practice

NPI Number

1306905716
Avg. Self-Pay Rate

$80

Low

$85

Median

$250

High

A typical office visit with a internal medicine physician in CA costs between $80 and $250, with a median of $85. These figures are based on negotiated office visit rates (CPT 99213–99215) disclosed under the Transparency in Coverage Act.

Actual office visit costs for William Matzner, M.D., PH.D. may vary depending on visit complexity, your insurance plan, and coverage details. Contact the provider's office for exact pricing.

Cost data sourced from insurer Transparency in Coverage Act filings. Costs shown are negotiated rates and may not reflect your actual out-of-pocket cost. Learn about our data

Local Market

Simi Valley Low

$85

Simi Valley Typical

$85

Simi Valley High

$88

In Simi Valley, a typical internal medicine physician visit costs $85, ranging from $85 to $88. This is 0% above the California state median of $85. Based on 7 providers with published pricing data.

Across California, a internal medicine physician visit ranges from $80 to $250 with a median of $85. This is 7% below the national median of $91. Based on 2,792 providers with published pricing data.

There are 10 internal medicine physicians in Simi Valley and 5,319 across California on our platform.

Individual negotiated rates for this provider are not yet available.

See full internal medicine physician cost breakdown in California
Patient Reviews

4.3

12 reviews

Vitals

Overall, patient sentiment towards Dr. William Matzner, M.D., Ph.D., is predominantly positive, with a 4-star rating based on 20 reviews. Many patients commend his extensive experience, medical expertise, and dedication to patient care. Common themes in praise include his thoroughness in addressing complex medical issues, his willingness to provide personal attention, and his adherence to the principles of the Hippocratic oath. Several patients have expressed gratitude for his role in saving their lives or significantly improving their health, highlighting his reputation as a knowledgeable and compassionate physician. However, there are some criticisms noted in the reviews. A few patients have mentioned concerns regarding office wait times and the overall cleanliness of the office environment. Additionally, some feedback indicates that while Dr. Matzner is knowledgeable, there may be room for improvement in his communication skills, particularly in explaining conditions and treatments. Despite these criticisms, the majority of patients recommend him for his expertise and the quality of care provided by him and his staff. Notable specifics that patients mention repeatedly include his ability to handle complex medical cases and the personal attention they receive during visits. While there are mixed reviews regarding the office experience, the consensus remains that Dr. Matzner is a capable and caring internist worth considering for those seeking internal medicine services in Simi Valley, CA.

Location

Address

143 PARROT LN

Simi Valley, CA 93065

Phone

8055787000
Similar Doctors

Other internal medicine physician in CA

Momentary Lab sources provider data from the CMS NPI Registry and cost data from federal Transparency in Coverage files. Reviews aggregated from Healthgrades, Vitals, WebMD, and other public sources. Learn how we verify and update healthcare information.

This page is for informational purposes only and does not constitute medical advice. Cost estimates are based on publicly available negotiated rate data and may not reflect your actual out-of-pocket cost. Always consult with your healthcare provider and insurance company for accurate cost information and medical decisions.