Doctor profile · Federal record
Dr. Diane Williams, DO
Gastroenterology Physician · Portland, OR
- NPI 1619973351
- 21 yrs on file
- Female
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
9701 Sw Barnes RD, Suite 300
Portland, OR 972256772
(503) 297-8081
fax (503) 292-6601 - Mailing address
-
541 Ne 20Th Ave Ste 225
Portland, OR 972322895
Credentials & registration
- NPI registered
- June 2005 — 21 yrs on file
- Profile last updated
- November 28, 2023
- Specialty taxonomy
- 207RG0100X — NUCC code
- State license (1)
- Oregon #DO15375
- Medicaid (2)
- OR #196642 · WA #8126294
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1619973351. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
563
Distinct HCPCS
10
Medicare allowed
$67,014
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
88305 |
Pathology examination of tissue using a microscope, intermediate complexity | 211 | 116 | $37 | |
45385 |
Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 95 | 95 | $249 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 66 | 61 | $130 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 40 | 39 | $179 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 38 | 38 | $103 | |
99203 |
New patient office or other outpatient visit, 30-44 minutes | 27 | 27 | $114 | |
45380 |
Biopsy of large bowel using a flexible endoscope | 25 | 25 | $132 | |
G0105 |
Colorectal cancer screening; colonoscopy on individual at high risk | 24 | 24 | $178 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 23 | 23 | $170 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 14 | 14 | $90 |
In context: peer comparison
Among 45 peers in Portland Gastroenterology Physician, average services per provider: 59. This provider delivers 9.5× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
628
Patients
279
Total drug cost
$61,915
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Pantoprazole Sodium | Generic | 151 | 48 | $2,017 |
| Famotidine | Generic | 93 | 20 | $1,475 |
| Omeprazole | Generic | 74 | 19 | $961 |
| Sutab (Sod Sulf/Pot Chloride/Mag Sulf) | Brand | 57 | 57 | $9,728 |
| Gavilyte-G (Peg3350/Sod Sulf,Bicarb,Cl/Kcl) | Brand | 47 | 47 | $903 |
| Dicyclomine Hcl | Generic | 38 | 11 | $935 |
| Ondansetron Odt (Ondansetron) | Brand | 36 | 34 | $216 |
| Budesonide Dr (Budesonide) | Brand | 30 | 0 | $2,756 |
| Sod Sulf-Potass Sulf-Mag Sulf (Sodium, Potassium,Mag Sulfates) | Brand | 27 | 26 | $1,960 |
| Ursodiol | Generic | 21 | 0 | $6,520 |
Frequently asked questions
What is Dr. Diane Williams's medical specialty?
Dr. Diane Williams practices Gastroenterology Physician in Portland, OR.
Where does Dr. Diane Williams practice?
Dr. Diane Williams practices at 9701 Sw Barnes RD, Portland, OR 972256772. Office phone: 5032978081.
What is Dr. Diane Williams's NPI?
Dr. Diane Williams's National Provider Identifier (NPI) is 1619973351, issued by NPPES.
What procedures does Dr. Diane Williams commonly perform?
Top Medicare-reported procedures in 2023: Pathology examination of tissue using a microscope, intermediate complexity (HCPCS 88305); Removal of polyps or growths of large bowel using an endoscope with mechanical snare (HCPCS 45385); Established patient office or other outpatient visit (HCPCS 99214). Source: CMS Medicare Physician & Other Practitioners file.