DR. REX CHENG M.D.
NPI 1689998874
Internal Medicine - Gastroenterology in Seattle, WA
About Dr. Rex Cheng M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. REX CHENG M.D. (NPI 1689998874) is an individual gastroenterology provider in Seattle, Washington, licensed in Washington (MD60579501) and active in the NPI registry since March 2010. He is enrolled in Medicare PECOS, is affiliated with Swedish Medical Center, and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Locations 2
Other Identifiers 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Rex Cheng M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show Rex Cheng reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Seattle, WA 98104
- Reassigned Medicare billing, Washington enrollment
- Also billed through NPI 1720023641 (Washington)
- 38 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 5
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Swedish Medical Center
Acute Care Hospitals · Seattle, WASwedish Issaquah
Acute Care Hospitals · Issaquah, WAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 98104 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SEATTLE, WA 98104
SEATTLE, WA 98104
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Rex Cheng's NPI number?
The NPI number for Rex Cheng is 1689998874. It was assigned to this individual provider in the NPPES registry on March 17, 2010.
Where is Rex Cheng located?
Rex Cheng practices at 1101 Madison St Ste 301, Seattle, WA 98104. The listed phone number is (206) 505-1300.
What is Rex Cheng's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.
Is Rex Cheng enrolled in Medicare?
Yes. Rex Cheng is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for Rex Cheng's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Rex Cheng reassigns Medicare benefits to Pacmed Clinics (Seattle, WA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Rex Cheng's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Rex Cheng accept?
Health plans from Ambetter Health and Premera Blue Cross Blue Shield of Alaska list Rex Cheng as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Rex Cheng affiliated with any hospitals?
According to CMS data, Rex Cheng is affiliated with Swedish Medical Center and Swedish Issaquah.
When was this NPI record last updated?
The NPPES record for Rex Cheng was last updated on April 16, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. Rex Cheng, M.D. · NPI 1689998874
Gastroenterology physician in Seattle, Washington. Individual provider, active in the CMS NPPES registry since March 17, 2010.
## Identity
- **NPI:** 1689998874 (Entity type: Individual)
- **Enumerated:** March 17, 2010
- **Primary specialty:** Internal Medicine - Gastroenterology · taxonomy 207RG0100X
- **State license:** MD60579501 (Washington)
- **Sole proprietor:** No
## Practice location
- **Address:** 1101 MADISON ST STE 301, Seattle, WA 98104-3599
- **Phone:** (206) 505-1300
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Pacmed Clinics (NPI 1437202249, Seattle, WA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Duke University School Of Medicine, class of 2010
## Record status
- **NPPES last updated:** April 16, 2021
- **Other identifiers:** Medicaid 1689998874 (WA)
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Source: [NPI Profile](https://npiprofile.com/npi/1689998874) · Data from the CMS NPPES public registry.