DR. SETH BRIAN GILLHAM M.D.
NPI 1588944847
Radiology - Diagnostic Radiology in Walla Walla, WA
About Dr. Seth Brian Gillham M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. SETH BRIAN GILLHAM M.D. (NPI 1588944847) is an individual diagnostic radiology provider in Walla Walla, Washington, licensed in Washington (MD60703695) and active in the NPI registry since August 2011. He is enrolled in Medicare PECOS, is affiliated with St. Patrick Hospital, and maintains a secondary practice location in Spokane.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 1
Other Identifiers 1
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. Seth Brian Gillham 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
12Medicare enrollment records show Seth Gillham reassigns Medicare billing to 12 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
College Place, WA 99324
- Reassigned Medicare billing, Washington enrollment
- Also billed through NPI 1134128911 (Washington)
- 160 clinicians in this Medicare group
Kennewick, WA 99337
- Reassigned Medicare billing, Washington enrollment
- 454 clinicians in this Medicare group
Moses Lake, WA 98837
- Reassigned Medicare billing, Washington enrollment
- 134 clinicians in this Medicare group
Ephrata, WA 98823
- Reassigned Medicare billing, Washington enrollment
- Medicare enrollment name: Grant County Public Hospital District No. 3
- 144 clinicians in this Medicare group
Quincy, WA 98848
- Reassigned Medicare billing, Washington enrollment
- Medicare enrollment name: Grant County Hospital District No. 2
- 141 clinicians in this Medicare group
Spokane, WA 99204
- Reassigned Medicare billing, Montana, Oregon and Washington enrollments
- Also billed through NPI 1205189461 (Oregon)
- 130 clinicians in this Medicare group
Spokane, WA 99202
- Reassigned Medicare billing, Montana, Oregon and Washington enrollments
- 120 clinicians in this Medicare group
Brewster, WA 98812
- Reassigned Medicare billing, Washington enrollment
- Also billed through NPI 1043363591 (Washington)
- 238 clinicians in this Medicare group
Seattle, WA 98144
- Reassigned Medicare billing, Montana, Oregon and Washington enrollments
- 129 clinicians in this Medicare group
Corvallis, OR 97330
- Reassigned Medicare billing, Oregon and Washington enrollments
- 162 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 69
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.
Hospital Affiliations CMS Care Compare 5
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
St. Patrick Hospital
Acute Care Hospitals · Missoula, MTSt Anthony Hospital
Critical Access Hospitals · Pendleton, ORProvidence St Mary Medical Center
Acute Care Hospitals · Walla Walla, WAProv Sacred Hrt Med Ctr & Childs Hosp.
Acute Care Hospitals · Spokane, WAKadlec Regional Medical Center
Acute Care Hospitals · Richland, WAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 99362 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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
WALLA WALLA, WA 99362
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 Seth Gillham's NPI number?
The NPI number for Seth Gillham is 1588944847. It was assigned to this individual provider in the NPPES registry on August 18, 2011.
Where is Seth Gillham located?
Seth Gillham practices at 401 W Poplar St, Walla Walla, WA 99362. The listed phone number is (509) 897-5850.
What is Seth Gillham's specialty?
The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.
Is Seth Gillham enrolled in Medicare?
Yes. Seth Gillham 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 Seth Gillham's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Seth Gillham reassigns Medicare benefits to 12 organizations: Columbia County Hospital District (College Place, WA), Kadlec Regional Medical Center (Kennewick, WA), Moses Lake Community Health Center (Moses Lake, WA), Grant County Public Hospital District 3 (Ephrata, WA), Grant County Public Hospital District 2 (Quincy, WA) and 7 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 Seth Gillham's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Seth Gillham affiliated with any hospitals?
According to CMS data, Seth Gillham is affiliated with St. Patrick Hospital, St Anthony Hospital, Providence St Mary Medical Center, Prov Sacred Hrt Med Ctr & Childs Hosp. and Kadlec Regional Medical Center.
When was this NPI record last updated?
The NPPES record for Seth Gillham was last updated on May 20, 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.