Rex Cheng, M.D.
Gastroenterology Physician · Seattle, WA
Rex Cheng, M.D. is a gastroenterology physician with a practice address in Seattle, Washington, and NPI 1689998874, issued on Mar 17, 2010. Check the license (Washington MD60579501, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Rex Cheng
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- MD60579501 WA
Self-reported in NPPES; status is on the state search - Practice location
- 1101 Madison St Ste 301, Seattle, WA 98104
- Phone
- (206) 505-1300
- Enumerated
- Mar 17, 2010
- Record last updated
- Apr 16, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicaid ID
- 1689998874 WA
- Medicare enrollment
- Enrolled (PECOS I20160613001636); accepts Medicare assignment
- Medical or professional school
- Duke University School Of Medicine, 2010
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 533 in Washington → Look up another NPI →
Also registered at 1101 Madison St Ste 301
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ashlan Applegate, PA-CPhysician Assistant1962025940
- Atis Barzdins, M.D.Hematology & Oncology Physician1275640179
- John Brooling, MDGastroenterology Physician1487944666
- Alice Chu, MDUrology Physician1356974208
- Jason Daly, LCSWSocial Worker1174819262
- Alice JiangInternal Medicine Physician1649807207
Verify Rex Cheng in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD60579501Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
9% fewer Medicare Part D claims than the average gastroenterology physician in 2024
740 Medicare Part D claims for 270 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims.
Most prescribed
- Omeprazole145 claims
- Pantoprazole Sodium73 claims
- Gavilyte-G52 claims
- Peg-3350 And Electrolytes48 claims
- Dicyclomine Hcl47 claims
- Nortriptyline Hcl44 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Pacmed ClinicsSeattle, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Rex Cheng among 533 gastroenterology physician records in Washington
Rex Cheng, M.D. is one of 533 gastroenterology physician records with a practice address in Washington. 76% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 71% of them.
- NPI issued2010 · 71% of these records are older, 26% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated2010 · median 2003 among the 373 with a school on file
- Record last updated2021 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Washington
There are 533 gastroenterology physician records in Washington.
All 533 in Washington → Every provider in Seattle → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Karlee Ausk, MDSeattle, WA 981041336159789
- Charles Bedard, MDSeattle, WA 981041184610214
- Christopher Carlson, M.D.Seattle, WA 981041821011065
- Richard Driscoll, MDSeattle, WA 981041447246582
- Martin Greene, MDSeattle, WA 981041952391856
- Lulu Iles-Shih, M.D.Seattle, WA 981041275748691
- Shoba Krishnamurthy, M.D.Seattle, WA 981041235128943
- Nicholas Procaccini, MDSeattle, WA 981041336351147
Common questions
What is Rex Cheng, M.D.'s NPI number?
Rex Cheng, M.D.'s National Provider Identifier (NPI) is 1689998874, issued on Mar 17, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Rex Cheng, M.D. located?
The NPPES record lists a practice address at 1101 Madison St Ste 301, Seattle, WA, 98104. Phone: (206) 505-1300. Providers update this record themselves, so call before visiting.
How can I verify Rex Cheng, M.D.'s license?
NPPES lists Washington license number MD60579501, as entered by the provider. Search the Washington Medical Commission at https://wahelms.my.site.com/s/license-search. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Rex Cheng, M.D. prescribe under Medicare Part D?
In 2024, Rex Cheng, M.D. had 740 Medicare Part D claims for 270 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.