DR. WINSTON DOUGLAS CHAMBERLAIN MD, PHD
NPI 1710108162
Ophthalmology - Cornea and External Diseases Specialist in Portland, OR
About Dr. Winston Douglas Chamberlain Md, Phd NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. WINSTON DOUGLAS CHAMBERLAIN MD, PHD (NPI 1710108162) is an individual cornea and external diseases specialist in Portland, Oregon, licensed in Oregon (MD28180) and active in the NPI registry since May 2007. He is enrolled in Medicare PECOS and is a graduate of University Of Colorado School Of Medicine, Denver (2002).
NPPES Registry Identity
Specialties & Licenses 2
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. Winston Douglas Chamberlain Md, Phd 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 Winston Chamberlain reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Portland, OR 97209
- Reassigned Medicare billing, Oregon and Washington enrollments
- Also billed through NPI 1871848457 (Washington)
- 3,207 clinicians in this Medicare group
Vancouver, WA 98683
- Reassigned Medicare billing, Washington enrollment
- 48 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 15
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 97239 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.
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.
PORTLAND, OR 97239
PORTLAND, OR 97239
PORTLAND, OR 97239
PORTLAND, OR 97239
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 Winston Chamberlain's NPI number?
The NPI number for Winston Chamberlain is 1710108162. It was assigned to this individual provider in the NPPES registry on May 2, 2007.
Where is Winston Chamberlain located?
Winston Chamberlain practices at 3375 SW Terwilliger Blvd, Portland, OR 97239. The listed phone number is (503) 494-3000.
What is Winston Chamberlain's specialty?
The primary specialty registered for this NPI is Ophthalmology, specializing in Cornea and External Diseases Specialist, with taxonomy code 207WX0120X.
Is Winston Chamberlain enrolled in Medicare?
Yes. Winston Chamberlain 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 Winston Chamberlain's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Winston Chamberlain reassigns Medicare benefits to 2 organizations: Kaiser Foundation Health Plan Of The Northwest (Portland, OR) and University Professional Services (Vancouver, 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 Winston Chamberlain's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Winston Chamberlain accept?
Health plans from Moda Health Plan, Inc. list Winston Chamberlain 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 Winston Chamberlain was last updated on April 9, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.
# Dr. Winston Douglas Chamberlain, MD, PHD · NPI 1710108162
Cornea and External Diseases Specialist physician in Portland, Oregon. Individual provider, active in the CMS NPPES registry since May 2, 2007.
## Identity
- **NPI:** 1710108162 (Entity type: Individual)
- **Enumerated:** May 2, 2007
- **Primary specialty:** Ophthalmology - Cornea and External Diseases Specialist · taxonomy 207WX0120X
- **State license:** MD28180 (Oregon)
- **Sole proprietor:** No
## Practice location
- **Address:** 3375 SW TERWILLIGER BLVD, Portland, OR 97239-4146
- **Phone:** (503) 494-3000 · **Fax:** (503) 494-4286
## 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): Kaiser Foundation Health Plan Of The Northwest (NPI 1649722034, Portland, OR); University Professional Services (NPI 1881848307, Vancouver, WA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Colorado School Of Medicine, Denver, class of 2002
## Record status
- **NPPES last updated:** April 9, 2018
---
Source: [NPI Profile](https://npiprofile.com/npi/1710108162) · Data from the CMS NPPES public registry.