1. Home
  2. Directory
  3. California
  4. Modesto
  5. Chiropractor
  6. NPI Profile

DR. RONALD JOHN MOSTOWSKI DC
NPI 1639176944
Chiropractor in Modesto, CA

Active since June 30, 2005Accepts Medicare Assignment
1500 STANDIFORD AVE, BLDG.B, MODESTO, CA 95350(209) 577-3300(209) 577-3569 Get Directions Write a Review

NPPES record last updated: January 18, 2023. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. Ronald John Mostowski Dc NPPES

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

DR. RONALD JOHN MOSTOWSKI DC (NPI 1639176944) is an individual chiropractor in Modesto, California, licensed in California (15328) and active in the NPI registry since June 2005. He is a graduate of Other (1983).

NPPES Registry Identity

NPI1639176944
Entity TypeIndividualMale
Primary Taxonomy111N00000X
Provider Legal NameDR. RONALD JOHN MOSTOWSKICredential: DC
Location Address1500 STANDIFORD AVE, BLDG.BModesto, CA 95350-0592
Mailing Address1500 Standiford Ave, Bldg.bModesto, CA 95350-0592 · (209) 577-3300 · Fax (209) 577-3569
Phone(209) 577-3300
Fax(209) 577-3569
Sole ProprietorYes
Medical School CMSOtherGraduated 1983
Enumeration DateJune 30, 2005
Last NPPES UpdateJanuary 18, 2023
NPPES CertifiedJanuary 18, 2023
✔ NPI 1639176944 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyChiropractorChiropractic Providers
Taxonomy Code111N00000X
License✔ Licensed in CA · 15328
Definition
A provider qualified by a Doctor of Chiropractic (D.C.), licensed by the State and who practices chiropractic medicine -that discipline within the healing arts which deals with the nervous system and its relationship to the spinal column and its interrelationship with other body systems.
1500 STANDIFORD AVE, Modesto, CA 95350
Open in Google Maps ↗

Other Identifiers 1

MedicaidGDC000580CA

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Providence Health Plan.Insurance ›

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 John Mostowski Dc 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 ID8628021268
PECOS Enrollment IDI20050223000912

Medicare Billing Reassignment

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

Ronald J. Mostowski,chiropractic, Inc.
Same address
Chiropractor
1500 STANDIFORD AVE, BLDG. B
Modesto, CA 95350
  • Reassigned Medicare billing, California enrollment
NPI 1457571648 (209) 577-3300

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.

Chiropractic manipulative treatment, 1-2 spinal regions 98940
Chiropractic manipulative treatment focuses on adjusting your spine to improve your body's physical function. In this service, a chiropractor applies controlled force to 1-2 spinal regions. This helps to restore mobility and alleviate discomfort in those areas.
122 services21 patients

Other Providers at the Same Location NPPES

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

RONALD J. MOSTOWSKI,CHIROPRACTIC, INC.
Chiropractor
1500 STANDIFORD AVE, BLDG. B
MODESTO, CA 95350
Stanislaus County (209) 577-3300

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 Mostowski's NPI number?

The NPI number for Ronald Mostowski is 1639176944. It was assigned to this individual provider in the NPPES registry on June 30, 2005.

Where is Ronald Mostowski located?

Ronald Mostowski practices at 1500 Standiford Ave Bldg.B, Modesto, CA 95350. The listed phone number is (209) 577-3300.

What is Ronald Mostowski's specialty?

The primary specialty registered for this NPI is Chiropractor with taxonomy code 111N00000X.

Is Ronald Mostowski enrolled in Medicare?

Yes. Ronald Mostowski 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 Mostowski's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Ronald Mostowski reassigns Medicare benefits to Ronald J. Mostowski,chiropractic, Inc. (Modesto, 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 Mostowski's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Ronald Mostowski accept?

Health plans from Providence Health Plan list Ronald Mostowski as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Ronald Mostowski was last updated on January 18, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.