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MATEUSZ P. KARWOWSKI M.D., M.P.H.
NPI 1598701849
Pediatrics in Spokane, WA

Active since June 22, 2006PECOS EnrolledAccepts Medicare Assignment
4001 N COOK ST STE 900, SPOKANE, WA 99207(509) 483-3427(509) 865-0757 Get Directions Write a Review

NPPES record last updated: September 16, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Mateusz P. Karwowski M.d., M.p.h. NPPES

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

MATEUSZ P. KARWOWSKI M.D., M.P.H. (NPI 1598701849) is an individual pediatrics provider in Spokane, Washington, licensed in Washington (MD61673723) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS and is a graduate of Other (2006).

NPPES Registry Identity

NPI1598701849
Entity TypeIndividualMale
Primary Taxonomy208000000X
Provider Legal NameMATEUSZ P. KARWOWSKICredential: M.D., M.P.H.
Location Address4001 N COOK ST STE 900Spokane, WA 99207-5879
Mailing AddressPo Box 190Toppenish, WA 98948-0190 · (509) 865-2395 · Fax (509) 865-0757
Phone(509) 483-3427
Fax(509) 865-0757
Sole ProprietorNo
Medical School CMSOtherGraduated 2006
Enumeration DateJune 22, 2006
Last NPPES UpdateSeptember 16, 2025
NPPES CertifiedSeptember 16, 2025
✔ NPI 1598701849 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians
Taxonomy Code208000000X
Licenses✔ Licensed in WA · MD61673723✔ Licensed in MA · 246895✔ Licensed in WI · 51544-020
Definition
A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.
4001 N COOK ST STE 900, Spokane, WA 99207
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Premera Blue Cross Blue Shield of Alaska, 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

Mateusz P. Karwowski M.d., M.p.h. 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 ID4880749696
PECOS Enrollment IDI20251014001558
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

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

Yakima Valley Farm Workers Clinic
Same address
Federally Qualified Health Center (FQHC)
4001 N COOK ST
Spokane, WA 99207
  • Reassigned Medicare billing, Washington enrollment
  • 252 clinicians in this Medicare group
NPI 1932400546 (509) 483-3427

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 99207 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$88.29 typical visit price
range $57.27 – $172.80
Typical copayment $22.07 (range $14.31 – $43.20)
Most-billed visit code 99203
Established Patient
$100.78 typical visit price
range $18.56 – $141.11
Typical copayment $25.19 (range $4.64 – $35.27)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 9

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

VICTORIA CLAIRE SYMONDS
Nurse Practitioner
4001 N COOK ST STE 900
SPOKANE, WA 99207
Spokane County (509) 483-3427
SHAYLA JUNE STOVER
Physician Assistant
4001 N COOK ST STE 900
SPOKANE, WA 99207
Spokane County (509) 483-3427
SAVANNA DAUGHERTY APC
Counselor (Mental Health)
4001 N COOK ST STE 900
SPOKANE, WA 99207
Spokane County (509) 326-4343
AUSTIN GEORGE
Nurse Practitioner (Psychiatric/Mental Health)
4001 N COOK ST STE 900
SPOKANE, WA 99207
Spokane County (509) 483-5879
AMANDA BOWSMAN APRN, CNP, PMHNP-BC
Nurse Practitioner (Psychiatric/Mental Health)
4001 N COOK ST STE 900
SPOKANE, WA 99207
Spokane County (509) 483-3427
MELINDA ROCA PHARMD
Pharmacist
4001 N COOK ST STE 900
SPOKANE, WA 99207
Spokane County (509) 483-3427
HANNAH CHOI PHARMD
Pharmacist
4001 N COOK ST STE 900
SPOKANE, WA 99207
Spokane County (509) 326-4343
CAMEREN REDMOND PA-C
Physician Assistant
4001 N COOK ST STE 900
SPOKANE, WA 99207
Spokane County (509) 865-2395

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 Mateusz Karwowski's NPI number?

The NPI number for Mateusz Karwowski is 1598701849. It was assigned to this individual provider in the NPPES registry on June 22, 2006.

Where is Mateusz Karwowski located?

Mateusz Karwowski practices at 4001 N Cook St Ste 900, Spokane, WA 99207. The listed phone number is (509) 483-3427.

What is Mateusz Karwowski's specialty?

The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.

Is Mateusz Karwowski enrolled in Medicare?

Yes. Mateusz Karwowski 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 Mateusz Karwowski's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mateusz Karwowski reassigns Medicare benefits to Yakima Valley Farm Workers Clinic (Spokane, WA). 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 Mateusz Karwowski's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Mateusz Karwowski accept?

Health plans from Premera Blue Cross Blue Shield of Alaska and Providence Health Plan list Mateusz Karwowski 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 Mateusz Karwowski was last updated on September 16, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.