MR. WILLIAM ANTHONY GROMKO M.D.
NPI 1477565026
Family Medicine in Sandy, OR
About Mr. William Anthony Gromko M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MR. WILLIAM ANTHONY GROMKO M.D. (NPI 1477565026) is an individual family medicine provider in Sandy, Oregon, licensed in Oregon (MD204079) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS, maintains a secondary practice location in Olympia, and is a graduate of Creighton University School Of Medicine (1974).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Other Identifiers 6
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
Mr. William Anthony Gromko 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
2Medicare enrollment records show William Gromko reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Libby, MT 59923
- Reassigned Medicare billing, Montana enrollment
- 6 clinicians in this Medicare group
Waite Park, MN 56387
- Reassigned Medicare billing, Minnesota enrollment
- 2,274 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 13
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 97055 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.
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 16
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 William Gromko's NPI number?
The NPI number for William Gromko is 1477565026. It was assigned to this individual provider in the NPPES registry on August 12, 2006.
Where is William Gromko located?
William Gromko practices at 17055 Ruben Ln, Sandy, OR 97055. The listed phone number is (503) 668-8002.
What is William Gromko's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is William Gromko enrolled in Medicare?
Yes. William Gromko 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 William Gromko's services?
According to the CMS Revalidation Reassignment List (October 2026 release), William Gromko reassigns Medicare benefits to 2 organizations: Family Health & Wellness, Inc. (Libby, MT) and Group Health, Inc. (Waite Park, MN). 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 William Gromko's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does William Gromko accept?
Health plans from Providence Health Plan list William Gromko 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 William Gromko was last updated on May 11, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.