Winston Chamberlain, MD, PHD
NPI 1710108162 · Cornea and External Diseases Specialist Physician · Portland, OR
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Winston Chamberlain, MD, PHD is a Cornea and External Diseases Specialist Physician provider in Portland, OR (NPI 1710108162).
Provider details
- NPI number
- 1710108162
- Entity type
- Individual
- Primary specialty
- Cornea and External Diseases Specialist PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, PHD
- Sex
- Male
- Sole proprietor
- No
- License
- MD28180 (OR)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
818 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 156 | $99 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 156 | $148 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 90 | $17 |
| Ct Scan of Cornea92025 | 76 | $20 |
| Imaging of Retina92134 | 64 | $26 |
| Ultrasound Scan of Cornea to Determine Thickness76514 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 21 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisolone Acetate | 270 | 129 |
| Fluorometholone | 139 | 60 |
| Ofloxacin | 70 | 50 |
| Timolol Maleate | 54 | 23 |
| Cyclosporinebrand: Restasis | 50 | 19 |
| Valacyclovir Hclbrand: Valacyclovir | 46 | 15 |
| Difluprednate | 45 | 13 |
| Loteprednol Etabonate | 42 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$5,081 across 4 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-05-02
- Last updated
- 2018-04-09
Frequently asked questions
- What is Winston Chamberlain's NPI number?
- Winston Chamberlain's National Provider Identifier (NPI) is 1710108162, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Winston Chamberlain's specialty?
- Winston Chamberlain is listed in the NPPES registry with a primary specialty of Cornea and External Diseases Specialist Physician (Allopathic & Osteopathic Physicians).
- Where is Winston Chamberlain located?
- Winston Chamberlain's practice location on file with NPPES is 3375 Sw Terwilliger Blvd, Portland, OR 97239-4146.
- What is Winston Chamberlain's phone number?
- The practice phone number listed in the NPPES registry for Winston Chamberlain is (503) 494-3000.
- Does Winston Chamberlain accept Medicare?
- Winston Chamberlain is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Winston Chamberlain's NPI active?
- Yes — Winston Chamberlain's NPI (1710108162) is active in the NPPES registry as of the last update on 2018-04-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.