Diane Williams, DO
NPI 1619973351 · Gastroenterology Physician · Portland, OR
Diane Williams, DO is a Gastroenterology Physician provider in Portland, OR (NPI 1619973351).
Provider details
- NPI number
- 1619973351
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Female
- Sole proprietor
- No
- License
- DO15375 (OR)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 4 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Famotidine | 24 | — |
| Pantoprazole Sodium | 21 | 14 |
| Dicyclomine Hcl | 16 | — |
| Omeprazole | 11 | — |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-06-27
- Last updated
- 2023-11-28
- Certified
- 2023-11-28
Frequently asked questions
- What is Diane Williams's NPI number?
- Diane Williams's National Provider Identifier (NPI) is 1619973351, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Diane Williams's specialty?
- Diane Williams is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Diane Williams located?
- Diane Williams's practice location on file with NPPES is 9701 Sw Barnes Rd, Portland, OR 97225-6772.
- What is Diane Williams's phone number?
- The practice phone number listed in the NPPES registry for Diane Williams is (503) 297-8081.
- Is Diane Williams's NPI active?
- Yes — Diane Williams's NPI (1619973351) is active in the NPPES registry as of the last update on 2023-11-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.