DR. MATTHEW J NIEDZWIECKI MD
NPI 1174859284
Psychiatry & Neurology - Psychiatry in Loma Linda, CA
About Dr. Matthew J Niedzwiecki Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MATTHEW J NIEDZWIECKI MD (NPI 1174859284) is an individual psychiatry provider in Loma Linda, California, licensed in Illinois (036.130526) and active in the NPI registry since October 2009. He is enrolled in Medicare PECOS, is affiliated with Presence Saint Joseph Hospital - Chicago, and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 2
Accepted 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. Matthew J Niedzwiecki Md 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
13Medicare enrollment records show Matthew Niedzwiecki reassigns Medicare billing to 13 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Redlands, CA 92373
- Reassigned Medicare billing, California enrollment
- 241 clinicians in this Medicare group
Spokane, WA 99202
- Reassigned Medicare billing, Washington enrollment
- 4,383 clinicians in this Medicare group
Sammamish, WA 98074
- Reassigned Medicare billing, Washington enrollment
- Medicare enrollment name: King County Public Hospital District No 2
- 1,074 clinicians in this Medicare group
San Antonio, TX 78213
- Reassigned Medicare billing, Texas enrollment
- 210 clinicians in this Medicare group
Laredo, TX 78041
- Reassigned Medicare billing, Texas enrollment
- 117 clinicians in this Medicare group
Waco, TX 76701
- Reassigned Medicare billing, Texas enrollment
- 172 clinicians in this Medicare group
Rosenberg, TX 77471
- Reassigned Medicare billing, Texas enrollment
- 48 clinicians in this Medicare group
Lufkin, TX 75901
- Reassigned Medicare billing, Texas enrollment
- 150 clinicians in this Medicare group
League City, TX 77573
- Reassigned Medicare billing, Texas enrollment
- 115 clinicians in this Medicare group
Centralia, IL 62801
- Reassigned Medicare billing, Illinois enrollment
- Medicare enrollment name: St Marys Hospital Centralia Illinois
- 392 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Presence Saint Joseph Hospital - Chicago
Acute Care Hospitals · Chicago, ILPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 92354 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 8
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
LOMA LINDA, CA 92354
LOMA LINDA, CA 92354
LOMA LINDA, CA 92354
LOMA LINDA, CA 92354
LOMA LINDA, CA 92354
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 Matthew Niedzwiecki's NPI number?
The NPI number for Matthew Niedzwiecki is 1174859284. It was assigned to this individual provider in the NPPES registry on October 23, 2009.
Where is Matthew Niedzwiecki located?
Matthew Niedzwiecki practices at 11332 Mountain View Ave Ste C, Loma Linda, CA 92354. The listed phone number is (401) 390-6297.
What is Matthew Niedzwiecki's specialty?
The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.
Is Matthew Niedzwiecki enrolled in Medicare?
Yes. Matthew Niedzwiecki 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 Matthew Niedzwiecki's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Matthew Niedzwiecki reassigns Medicare benefits to 13 organizations: Darin Rentz Do PC (Redlands, CA), Multicare Health System (Spokane, WA), Public Hospital District No 2 (Sammamish, WA), Bexar County Board Of Trustees For Mental Health Mental Retardation (San Antonio, TX), Border Region Mh Mr Community Center (Laredo, TX) and 8 more organizations, listed in the Medicare section above. 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 Matthew Niedzwiecki's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Matthew Niedzwiecki accept?
Health plans from AmeriHealth Caritas Next, Baylor Scott and White Health Plan, Blue Cross and Blue Shield of Texas, Cigna Healthcare and Mountain Health CO-OP and 4 other insurers list Matthew Niedzwiecki 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.
Is Matthew Niedzwiecki affiliated with any hospitals?
According to CMS data, Matthew Niedzwiecki is affiliated with Presence Saint Joseph Hospital - Chicago.
When was this NPI record last updated?
The NPPES record for Matthew Niedzwiecki was last updated on January 12, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 months 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. Matthew J Niedzwiecki, MD · NPI 1174859284
Psychiatry physician in Loma Linda, California. Individual provider, active in the CMS NPPES registry since October 23, 2009.
## Identity
- **NPI:** 1174859284 (Entity type: Individual)
- **Enumerated:** October 23, 2009
- **Primary specialty:** Psychiatry & Neurology - Psychiatry · taxonomy 2084P0800X
- **State license:** 036.130526 (Illinois)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 11332 MOUNTAIN VIEW AVE STE C, Loma Linda, CA 92354-3854
- **Phone:** (401) 390-6297
## 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:** 13 organizations under Medicare reassignment (form CMS-855R): Darin Rentz Do PC (NPI 1689321747, Redlands, CA); Multicare Health System (NPI 1730687161, Spokane, WA); Public Hospital District No 2 (NPI 1417058694, Sammamish, WA); Bexar County Board Of Trustees For Mental Health Mental Retardation (NPI 1679948392, San Antonio, TX); Border Region Mh Mr Community Center (NPI 1124060173, Laredo, TX); and 8 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2009
## Record status
- **NPPES last updated:** January 12, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1174859284) · Data from the CMS NPPES public registry.