DR. RONALD RICHARD MATUSZAK III M.D.
NPI 1932496791
Hospitalist in Dublin, CA
About Dr. Ronald Richard Matuszak Iii M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. RONALD RICHARD MATUSZAK III M.D. (NPI 1932496791) is an individual hospitalist provider in Dublin, California, licensed in California (A147969) and active in the NPI registry since June 2011. He is enrolled in Medicare PECOS, maintains a secondary practice location in Fremont, and is a graduate of Other (2011).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 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. Ronald Richard Matuszak Iii M.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.
Medicare Billing Reassignments
3Medicare enrollment records show Ronald Matuszak reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Orinda, CA 94563
- Reassigned Medicare billing, California enrollment
- 4,479 clinicians in this Medicare group
Apple Valley, CA 92307
- Reassigned Medicare billing, California enrollment
- 914 clinicians in this Medicare group
San Bernardino, CA 92404
- Reassigned Medicare billing, California enrollment
- 1,216 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 3
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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94568 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Reported Quality Measures
Referred Medical Equipment & Supplies CMS DME claims
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Matuszak's NPI number?
The NPI number for Ronald Matuszak is 1932496791. It was assigned to this individual provider in the NPPES registry on June 30, 2011.
Where is Ronald Matuszak located?
Ronald Matuszak practices at 4050 Dublin Blvd, Dublin, CA 94568. The listed phone number is (925) 875-6100.
What is Ronald Matuszak's specialty?
The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.
Is Ronald Matuszak enrolled in Medicare?
Yes. Ronald Matuszak 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 organizations bill Medicare for Ronald Matuszak's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ronald Matuszak reassigns Medicare benefits to 3 organizations: Sutter Bay Medical Foundation (Orinda, CA), Hospitalist Medicine Physicians Of California, Inc (Apple Valley, CA) and Inpatient Specialists Of California, PC (San Bernardino, CA). Each 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 Matuszak'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 Matuszak was last updated on October 13, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Dr. Ronald Richard Matuszak III, M.D. · NPI 1932496791
Hospitalist physician in Dublin, California. Individual provider, active in the CMS NPPES registry since June 30, 2011.
## Identity
- **NPI:** 1932496791 (Entity type: Individual)
- **Enumerated:** June 30, 2011
- **Primary specialty:** Hospitalist · taxonomy 208M00000X
- **State license:** A147969 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 4050 DUBLIN BLVD, Dublin, CA 94568-3112
- **Phone:** (925) 875-6100
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): Sutter Bay Medical Foundation (NPI 1366898538, Orinda, CA); Hospitalist Medicine Physicians Of California, Inc (NPI 1184663965, Apple Valley, CA); Inpatient Specialists Of California, PC (NPI 1952792475, San Bernardino, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2011
## Record status
- **NPPES last updated:** October 13, 2022
---
Source: [NPI Profile](https://npiprofile.com/npi/1932496791) · Data from the CMS NPPES public registry.