GARY L TREECE MD
NPI 1447269857
Internal Medicine - Endocrinology, Diabetes & Metabolism in Yakima, WA
About Gary L Treece Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GARY L TREECE MD (NPI 1447269857) is an individual endocrinology, diabetes & metabolism provider in Yakima, Washington, licensed in Washington (MD.MD.00022600) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS, is affiliated with Yakima Valley Memorial, and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 2
Other Identifiers 1
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
Gary L Treece 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
2Medicare enrollment records show Gary Treece reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Yakima, WA 98902
- Reassigned Medicare billing, Washington enrollment
- Medicare enrollment name: Sunnyside Community Hospital Association
- Also billed through NPI 1225033814 (Washington)
- 132 clinicians in this Medicare group
Union Gap, WA 98903
- Reassigned Medicare billing, Washington enrollment
- 80 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 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Yakima Valley Memorial
Acute Care Hospitals · Yakima, WAAstria Sunnyside Hospital
Critical Access Hospitals · Sunnyside, WAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 98902 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims 2
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 2
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 Gary Treece's NPI number?
The NPI number for Gary Treece is 1447269857. It was assigned to this individual provider in the NPPES registry on August 5, 2006.
Where is Gary Treece located?
Gary Treece practices at 209 S 12th Ave, Yakima, WA 98902. The listed phone number is (509) 577-4600.
What is Gary Treece's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.
Is Gary Treece enrolled in Medicare?
Yes. Gary Treece 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 Gary Treece's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Gary Treece reassigns Medicare benefits to 2 organizations: Sunnyside Community Hospital Assocation (Yakima, WA) and Shc Medical Center Toppenish (Union Gap, WA). 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 Gary Treece's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Gary Treece accept?
Health plans from Ambetter Health, Premera Blue Cross Blue Shield of Alaska and Providence Health Plan list Gary Treece 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 Gary Treece affiliated with any hospitals?
According to CMS data, Gary Treece is affiliated with Yakima Valley Memorial and Astria Sunnyside Hospital.
When was this NPI record last updated?
The NPPES record for Gary Treece was last updated on August 4, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Gary L Treece, MD · NPI 1447269857
Endocrinology, Diabetes & Metabolism physician in Yakima, Washington. Individual provider, active in the CMS NPPES registry since August 5, 2006.
## Identity
- **NPI:** 1447269857 (Entity type: Individual)
- **Enumerated:** August 5, 2006
- **Primary specialty:** Internal Medicine - Endocrinology, Diabetes & Metabolism · taxonomy 207RE0101X
- **State license:** MD.MD.00022600 (Washington)
- **Sole proprietor:** No
## Practice location
- **Address:** 209 S 12TH AVE, Yakima, WA 98902-3110
- **Phone:** (509) 577-4600 · **Fax:** (509) 577-4619
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Sunnyside Community Hospital Assocation (NPI 1871002527, Yakima, WA); Shc Medical Center Toppenish (NPI 1013492784, Union Gap, WA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of California, Irvine, California College Of Medicine, class of 1971
## Record status
- **NPPES last updated:** August 4, 2026
- **Other identifiers:** Medicaid 1073436 (WA)
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Source: [NPI Profile](https://npiprofile.com/npi/1447269857) · Data from the CMS NPPES public registry.