DR. CHET W HAMMILL MD
NPI 1720283310
Surgery in Portland, OR
About Dr. Chet W Hammill Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. CHET W HAMMILL MD (NPI 1720283310) is an individual surgery provider in Portland, Oregon, licensed in Oregon (MD215325) and active in the NPI registry since June 2007. He is enrolled in Medicare PECOS, is affiliated with Barnes Jewish Hospital, and maintains a secondary practice location in Portland.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Other Identifiers 3
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
Dr. Chet W Hammill 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
5Medicare enrollment records show Chet Hammill reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Portland, OR 97213
- Reassigned Medicare billing, Oregon enrollment
- 676 clinicians in this Medicare group
Portland, OR 97213
- Reassigned Medicare billing, Oregon enrollment
- 1,501 clinicians in this Medicare group
Portland, OR 97232
- Reassigned Medicare billing, Oregon enrollment
- 338 clinicians in this Medicare group
White Salmon, WA 98672
- Reassigned Medicare billing, Washington enrollment
- Also billed through NPI 1760455687 (Washington)
- 85 clinicians in this Medicare group
Astoria, OR 97103
- Reassigned Medicare billing, Oregon enrollment
- Also billed through NPI 1134146939 (Oregon)
- 278 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.
Barnes Jewish Hospital
Acute Care Hospitals · Saint Louis, MOProvidence Portland Medical Center
Acute Care Hospitals · Portland, ORPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 97213 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 12
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
PORTLAND, OR 97213
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 Chet Hammill's NPI number?
The NPI number for Chet Hammill is 1720283310. It was assigned to this individual provider in the NPPES registry on June 15, 2007.
Where is Chet Hammill located?
Chet Hammill practices at 4805 NE Glisan St Ste 6n60, Portland, OR 97213. The listed phone number is (503) 281-0561.
What is Chet Hammill's specialty?
The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.
Is Chet Hammill enrolled in Medicare?
Yes. Chet Hammill 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 Chet Hammill's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Chet Hammill reassigns Medicare benefits to 5 organizations: Providence Health & Services - Oregon (Portland, OR), Providence Health & Services - Oregon (Portland, OR), The Oregon Clinic PC (Portland, OR), Public Hospital District No 2, Klickitat County Washington (White Salmon, WA) and Columbia Lutheran Charities (Astoria, OR). 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 Chet Hammill's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Chet Hammill accept?
Health plans from BridgeSpan Health Company, Moda Health Plan, Inc., PacificSource Health Plans, Premera Blue Cross Blue Shield of Alaska and Providence Health Plan and 1 other insurer list Chet Hammill 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 Chet Hammill affiliated with any hospitals?
According to CMS data, Chet Hammill is affiliated with Barnes Jewish Hospital and Providence Portland Medical Center.
When was this NPI record last updated?
The NPPES record for Chet Hammill was last updated on December 4, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.
# Dr. Chet W Hammill, MD · NPI 1720283310
Surgery physician in Portland, Oregon. Individual provider, active in the CMS NPPES registry since June 15, 2007.
## Identity
- **NPI:** 1720283310 (Entity type: Individual)
- **Enumerated:** June 15, 2007
- **Primary specialty:** Surgery · taxonomy 208600000X
- **State license:** MD215325 (Oregon)
- **Sole proprietor:** No
## Practice location
- **Address:** 4805 NE GLISAN ST STE 6N60, Portland, OR 97213-2933
- **Phone:** (503) 281-0561 · **Fax:** (503) 416-7377
## 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:** 5 organizations under Medicare reassignment (form CMS-855R): Providence Health & Services - Oregon (NPI 1003991845, Portland, OR); Providence Health & Services - Oregon (NPI 1316197692, Portland, OR); The Oregon Clinic PC (NPI 1265417174, Portland, OR); Public Hospital District No 2, Klickitat County Washington (NPI 1952483653, White Salmon, WA); Columbia Lutheran Charities (NPI 1700809761, Astoria, OR) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Illinois College Of Med, class of 1998
## Record status
- **NPPES last updated:** December 4, 2025
- **Other identifiers:** Medicaid 500607946 (OR); Medicaid 200040877 (MO); Medicaid 2003573 (WA)
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Source: [NPI Profile](https://npiprofile.com/npi/1720283310) · Data from the CMS NPPES public registry.