DR. HOU HSIEN CHIANG MD
NPI 1255837100
Internal Medicine - Endocrinology, Diabetes & Metabolism in Seattle, WA
About Dr. Hou Hsien Chiang Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. HOU HSIEN CHIANG MD (NPI 1255837100) is an individual endocrinology, diabetes & metabolism provider in Seattle, Washington, licensed in Washington (MD61136439) and active in the NPI registry since March 2018. He is enrolled in Medicare PECOS, is affiliated with University Of Washington Medical Ctr, and maintains a secondary practice location in Seattle.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
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. Hou Hsien Chiang Md 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 Reassignments
3Medicare enrollment records show Hou Hsien Chiang reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Seattle, WA 98104
- Reassigned Medicare billing, Washington enrollment
- 663 clinicians in this Medicare group
Seattle, WA 98104
- Reassigned Medicare billing, Washington enrollment
- 1,270 clinicians in this Medicare group
Seattle, WA 98104
- Reassigned Medicare billing, Washington enrollment
- 4,364 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 4
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 5
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
University Of Washington Medical Ctr
Acute Care Hospitals · Seattle, WASwedish Edmonds Hospital
Acute Care Hospitals · Edmonds, WASwedish Medical Center
Acute Care Hospitals · Seattle, WAOlympic Medical Center
Acute Care Hospitals · Port Angeles, WAEvergreenhealth Medical Center
Acute Care Hospitals · Kirkland, 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.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
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 Hou Hsien Chiang's NPI number?
The NPI number for Hou Hsien Chiang is 1255837100. It was assigned to this individual provider in the NPPES registry on March 31, 2018.
Where is Hou Hsien Chiang located?
Hou Hsien Chiang practices at 1124 Columbia St Ste 400, Seattle, WA 98104. The listed phone number is (206) 215-2440.
What is Hou Hsien Chiang's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.
Is Hou Hsien Chiang enrolled in Medicare?
Yes. Hou Hsien Chiang 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 organizations bill Medicare for Hou Hsien Chiang's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Hou Hsien Chiang reassigns Medicare benefits to 3 organizations: Swedish Health Services (Seattle, WA), Swedish Health Services (Seattle, WA) and The Association Of University Physicians (Seattle, WA). Each 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 Hou Hsien Chiang's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Hou Hsien Chiang accept?
Health plans from Ambetter Health and Premera Blue Cross Blue Shield of Alaska list Hou Hsien Chiang 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 Hou Hsien Chiang affiliated with any hospitals?
According to CMS data, Hou Hsien Chiang is affiliated with University Of Washington Medical Ctr, Swedish Edmonds Hospital, Swedish Medical Center, Olympic Medical Center and Evergreenhealth Medical Center.
When was this NPI record last updated?
The NPPES record for Hou Hsien Chiang was last updated on November 5, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 months 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. Hou Hsien Chiang, MD · NPI 1255837100
Endocrinology, Diabetes & Metabolism physician in Seattle, Washington. Individual provider, active in the CMS NPPES registry since March 31, 2018.
## Identity
- **NPI:** 1255837100 (Entity type: Individual)
- **Enumerated:** March 31, 2018
- **Primary specialty:** Internal Medicine - Endocrinology, Diabetes & Metabolism · taxonomy 207RE0101X
- **State license:** MD61136439 (Washington)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 1124 COLUMBIA ST STE 400, Seattle, WA 98104-2053
- **Phone:** (206) 215-2440 · **Fax:** (206) 215-2457
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Swedish Health Services (NPI 1619680840, Seattle, WA); Swedish Health Services (NPI 1689612954, Seattle, WA); The Association Of University Physicians (NPI 1023041159, Seattle, WA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2006
## Record status
- **NPPES last updated:** November 5, 2025
- **Other identifiers:** Medicaid 2188267 (WA)
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Source: [NPI Profile](https://npiprofile.com/npi/1255837100) · Data from the CMS NPPES public registry.