DR. DIANE H WILLIAMS (DO) – Gastroenterology Physician, NPI 1619973351
Preparing for Medicare enrollment?
Use our CMS-855 prep checklist: which form applies (855I, 855O, or 855A), readiness score, NPPES field map, and Section 12 documents. Reassignment uses CMS-855I Section 4F—not the discontinued CMS-855R form.
Open Medicare 855 Prep tool →Gastroenterology Physician
Main info
Doctor Profile
Contacts
Profile Insights
NPPES metrics only — not quality of care.
Loading map...
Provider Addresses for DR. DIANE H WILLIAMS (DO)
Southwest Barnes Road, Sylvan-Highlands, Portland, Metro, Multnomah County, Oregon, 97210, United States
SUITE 300
PORTLAND, OR 972256772
Phone: (503) 297-8081
Fax: (503) 292-6601
Type: Location
Cascadia Behavioral Healthcare Administrative Office, 847, Northeast 19th Avenue, Kerns, Portland, Metro, Multnomah County, Oregon, 97232, United States
SUITE 300
PORTLAND, OR 972322684
Phone: (503) 963-2801
Fax: (503) 963-2825
Type: Mailing
541 NE 20TH AVE STE 225
PORTLAND, OR 972322895
Phone: (503) 963-2801
Fax: (503) 963-2825
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
Loading prescription activity...
Open Payments (CMS)
No Open Payments data available for this provider.
This can happen when there are no reportable CMS Open Payments records.
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
No Medicare enrollment or revalidation data available for this provider in our database.
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 |
|---|---|---|---|---|
| 88305 | Pathology examination of tissue using a microscope, intermediate complexity | 211 | 116 | $0 |
| 45385 | Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 95 | 95 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 66 | 61 | $0 |
| 99215 | Established patient office or other outpatient visit, 40-54 minutes | 40 | 39 | $0 |
| 43239 | Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 38 | 38 | $0 |
Insurance plans in this area (ZIP 97225)
Loading plans...
Group practice members
| Name | Specialty | State |
|---|---|---|
| Pulmonary Disease | OR | |
| - | OR | |
| O T O L A R Y N G O L O G Y | OR | |
| Internal Medicine, Gastroenterology | OR | |
| Gastroenterology, Internal Medicine | OR | |
| - | OR | |
| - | OR | |
| Qualified Audiologist | OR | |
| Physician Assistant | OR | |
| N E U R O S U R G E R Y | OR |
Reviews
All reviews are moderated before publication. Reviews reflect users' opinions; we do not verify the accuracy of individual reviews.
No reviews yet. Be the first to share your experience — your opinion helps families compare providers.