MR. MARK J NIEZGODA LICSW
NPI 1447888946
Social Worker - Clinical in Seattle, WA
About Mr. Mark J Niezgoda Licsw NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MR. MARK J NIEZGODA LICSW (NPI 1447888946) is an individual clinical provider in Seattle, Washington, licensed in Washington (LW60991792) and active in the NPI registry since March 2020. He is enrolled in Medicare PECOS and is a graduate of Other (1993).
NPPES Registry Identity
Specialties & Licenses
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
Mr. Mark J Niezgoda Licsw 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 Reassignment
Medicare enrollment records show Mark Niezgoda reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Renton, WA 98057
- Reassigned Medicare billing, Washington enrollment
- 7 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 98118 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
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 Mark Niezgoda's NPI number?
The NPI number for Mark Niezgoda is 1447888946. It was assigned to this individual provider in the NPPES registry on March 30, 2020.
Where is Mark Niezgoda located?
Mark Niezgoda practices at 4219 S Othello St Apt 517, Seattle, WA 98118. The listed phone number is (206) 321-3997.
What is Mark Niezgoda's specialty?
The primary specialty registered for this NPI is Social Worker, specializing in Clinical, with taxonomy code 1041C0700X.
Is Mark Niezgoda enrolled in Medicare?
Yes. Mark Niezgoda 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 Mark Niezgoda's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mark Niezgoda reassigns Medicare benefits to Renton Counseling Center, PLLC (Renton, 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 Mark Niezgoda'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 Mark Niezgoda was last updated on March 30, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.
# Mr. Mark J Niezgoda, LICSW · NPI 1447888946
Clinical provider in Seattle, Washington. Individual provider, active in the CMS NPPES registry since March 30, 2020.
## Identity
- **NPI:** 1447888946 (Entity type: Individual)
- **Enumerated:** March 30, 2020
- **Primary specialty:** Social Worker - Clinical · taxonomy 1041C0700X
- **State license:** LW60991792 (Washington)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 4219 S OTHELLO ST APT 517, Seattle, WA 98118-3886
- **Phone:** (206) 321-3997
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment
- **Bills Medicare through:** Renton Counseling Center, PLLC (NPI 1144735911, Renton, WA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1993
## Record status
- **NPPES last updated:** March 30, 2020
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Source: [NPI Profile](https://npiprofile.com/npi/1447888946) · Data from the CMS NPPES public registry.