DR. WINSTON DOUGLAS CHAMBERLAIN (MD, PHD) – Cornea and External Diseases Specialist Physician, NPI 1710108162
Cornea and External Diseases Specialist Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
343 OPHTHALMOLOGY in OR
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Provider Addresses for DR. WINSTON DOUGLAS CHAMBERLAIN (MD, PHD)
Casey Eye Institute, 3375, Southwest Terwilliger Boulevard, Marquam Hill, Homestead, Portland, Metro, Multnomah County, Oregon, 97239, United States
PORTLAND, OR 972394146
Phone: (503) 494-3000
Fax: (503) 494-4286
Mailing address matches the actual address.
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 13 Open Payments records for all available years, with a total value of $10,207.
Total Amount is formed as General ($5,815) + Research ($4,393) + Ownership ($0) = $10,207.
Last reported payment date: 2024-09-01 • Largest payer in this snapshot: Regeneron Pharmaceuticals, Inc. ($4,393).
Total Amount
$10,207
General + Research + Ownership
Payments
13
Total payment records
General Amount
$5,815
General payments
Research Amount
$4,393
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-09-01
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Regeneron Pharmaceuticals, Inc. | $4,393 |
| ABBVIE INC. | $2,156 |
| Oyster Point Pharma, Inc. | $1,800 |
| Glaukos Corporation | $1,125 |
| PFIZER INC. | $500 |
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2010-05-17
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking 2 Medicare enrollment records; no due dates published yet.
Enrollment records
2
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20080708000272 | I | Ophthalmology | OR | TBD |
| I20100517000469 | I | Ophthalmology | WA | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 92014 | Established patient complete exam of visual system | 235 | 209 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 102 | 100 | $0 |
| 76514 | Ultrasound scan of cornea to determine thickness | 65 | 58 | $0 |
| 92134 | Imaging of retina | 57 | 46 | $0 |
| 92012 | Established patient problem focused exam of visual system | 56 | 40 | $0 |
Insurance plans in this area (ZIP 97239)
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Provider's Procedures
Group practice members
| Name | Specialty | State |
|---|---|---|
| U R O L O G Y | TX | |
| Emergency Medicine | OR | |
| D E R M A T O L O G Y | AZ | |
| Nurse Practitioner | OR | |
| Diagnostic Radiology | OR | |
| D E R M A T O L O G Y | WA | |
| - | OR | |
| - | CA | |
| General Surgery | CA | |
| - | OR |
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