Doctor profile · Federal record
Dr. Chun-Yang Chang, MD
Gastroenterology Physician (CMS: Gastroenterology) · Oregon City, OR
- NPI 1033106034
- Accepts Medicare
- 30 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
1508 Division St, Ste 15
Oregon City, OR 970451582
(503) 692-3750
fax (503) 691-2324 - Additional location
-
19250 Sw 90Th Ave
Tualatin, OR 970627585 - Mailing address
-
541 Ne 20Th Ave Ste 225
Portland, OR 972322895
Credentials & registration
- NPI registered
- October 2005 — 21 yrs on file
- Profile last updated
- November 28, 2023
- Year of graduation
- 1996 — 30 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State license (1)
- Oregon #MD23576
- Medicaid (2)
- WA #1033106034 · OR #286972
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1033106034. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
272
Distinct HCPCS
6
Medicare allowed
$30,118
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
88305 |
Pathology examination of tissue using a microscope, intermediate complexity | 108 | 66 | $37 | |
45385 |
Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 54 | 54 | $243 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 34 | 30 | $90 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 32 | 27 | $130 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 23 | 23 | $86 | |
G0105 |
Colorectal cancer screening; colonoscopy on individual at high risk | 21 | 21 | $181 |
In context: peer comparison
Among 2 peers in Oregon City Gastroenterology Physician, average services per provider: 45. This provider delivers 6.0× the peer median.Open Payments
Industry payments received
All-time total
$32
Transactions
1
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Janssen Biotech, INC. | 1 | $31.95 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
320
Patients
168
Total drug cost
$20,568
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Omeprazole | Generic | 86 | 33 | $1,994 |
| Gavilyte-G (Peg3350/Sod Sulf,Bicarb,Cl/Kcl) | Brand | 57 | 56 | $1,110 |
| Pantoprazole Sodium | Generic | 27 | 0 | $459 |
| Ondansetron Odt (Ondansetron) | Brand | 26 | 26 | $109 |
| Famotidine | Generic | 21 | 0 | $209 |
| Mesalamine | Generic | 21 | 0 | $9,862 |
| Sod Sulf-Potass Sulf-Mag Sulf (Sodium, Potassium,Mag Sulfates) | Brand | 18 | 18 | $1,288 |
| Ondansetron Hcl | Generic | 17 | 13 | $205 |
| Budesonide Dr (Budesonide) | Brand | 14 | 0 | $1,357 |
| Gavilyte-C (Peg3350/Sod Sulf,Bicarb,Cl/Kcl) | Brand | 11 | 11 | $196 |
Hospital affiliations
Frequently asked questions
What is Dr. Chun-Yang Chang's medical specialty?
Dr. Chun-Yang Chang practices Gastroenterology Physician in Oregon City, OR.
Where does Dr. Chun-Yang Chang practice?
Dr. Chun-Yang Chang practices at 1508 Division St, Oregon City, OR 970451582. Office phone: 5036923750.
What is Dr. Chun-Yang Chang's NPI?
Dr. Chun-Yang Chang's National Provider Identifier (NPI) is 1033106034, issued by NPPES.
Does Dr. Chun-Yang Chang accept Medicare assignment?
Yes. Dr. Chun-Yang Chang accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Chun-Yang Chang 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 99213). Source: CMS Medicare Physician & Other Practitioners file.