Doctor profile · Federal record
Dr. Rex Cheng, M.D.
Gastroenterology Physician (CMS: Gastroenterology) · Transplant Hepatology Physician · Seattle, WA
- NPI 1689998874
- Accepts Medicare
- 16 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
Operates at 3 locations .
- Primary practice
-
1101 Madison St Ste 301
Seattle, WA 981043599
(206) 505-1300 - Additional location
-
1909 214Th St Se Ste 300
Bothell, WA 980214418
(425) 412-7200
fax (425) 412-7350 - Additional location
-
1959 Ne Pacific St
Seattle, WA 981954409
(206) 598-4377 - Mailing address
-
Po Box 50095
Seattle, WA 981455095
Credentials & registration
- NPI registered
- March 2010 — 16 yrs on file
- Profile last updated
- April 16, 2021
- Year of graduation
- 2010 — 16 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State license (1)
- Washington #MD60579501
- Medicaid
- WA #1689998874
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1689998874. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
197
Distinct HCPCS
5
Medicare allowed
$32,414
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
45385 |
Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 64 | 64 | $264 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 45 | 45 | $165 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 42 | 36 | $129 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 27 | 27 | $80 | |
45380 |
Biopsy of large bowel using a flexible endoscope | 19 | 19 | $27 |
In context: peer comparison
Among 44 peers in Seattle Gastroenterology Physician, average services per provider: 39. This provider delivers 5.1× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
706
Patients
323
Total drug cost
$48,728
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Omeprazole | Generic | 163 | 41 | $2,705 |
| Gavilyte-G (Peg3350/Sod Sulf,Bicarb,Cl/Kcl) | Brand | 151 | 147 | $2,431 |
| Pantoprazole Sodium | Generic | 110 | 35 | $2,001 |
| Dicyclomine Hcl | Generic | 45 | 17 | $445 |
| Nortriptyline Hcl | Generic | 41 | 14 | $303 |
| Gavilyte-C (Peg3350/Sod Sulf,Bicarb,Cl/Kcl) | Brand | 26 | 26 | $447 |
| Peg-3350 and Electrolytes (Peg3350/Sod Sulf,Bicarb,Cl/Kcl) | Brand | 24 | 24 | $433 |
| Famotidine | Generic | 23 | 0 | $707 |
| Vemlidy (Tenofovir Alafenamide) | Brand | 22 | 0 | $34,309 |
| Buspirone Hcl | Generic | 19 | 0 | $136 |
Hospital affiliations
Frequently asked questions
What is Dr. Rex Cheng's medical specialty?
Dr. Rex Cheng practices Gastroenterology Physician in Seattle, WA.
Where does Dr. Rex Cheng practice?
Dr. Rex Cheng practices at 1101 Madison St Ste 301, Seattle, WA 981043599. Office phone: 2065051300.
What is Dr. Rex Cheng's NPI?
Dr. Rex Cheng's National Provider Identifier (NPI) is 1689998874, issued by NPPES.
Does Dr. Rex Cheng accept Medicare assignment?
Yes. Dr. Rex Cheng accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Rex Cheng commonly perform?
Top Medicare-reported procedures in 2023: Removal of polyps or growths of large bowel using an endoscope with mechanical snare (HCPCS 45385); New patient office or other outpatient visit (HCPCS 99204); Established patient office or other outpatient visit (HCPCS 99214). Source: CMS Medicare Physician & Other Practitioners file.