Dr. William Chiang, MD
- Medicare services, 2024
- 206
- Medicare patients, 2024
- 139
- Part D claims, 2024
- 62
- MIPS score, 2024
- 91
- Hospital affiliations
- 3
- Practice address
- 747 Broadway, Seattle, WA 98122
- Practice phone
- Call (206) 386-6000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Swedish Medical Center -First Hill
Seattle, Washington
Find Dr. Chiang's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. William Chiang is an emergency medicine physician in Seattle, Washington
Dr. Chiang practices at Swedish Medical Center -First Hill in Seattle, Washington.
Dr. Chiang's NPI, 1417336165, was assigned on May 28, 2015. Dr. Chiang graduated from State University of New York Downstate Medical Center in 2015. Dr. Chiang holds California license A162279.
- NPI
- 1417336165NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3678800901
- NPI enumeration date
- May 28, 2015
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (206) 386-6000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 37
- Medical school graduation
- 2015
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. William Chiang practices at Swedish Medical Center -First Hill in Seattle, Washington
Dr. Chiang's primary practice is Swedish Medical Center -First Hill, at 747 Broadway, Seattle, WA 98122 in King County. The practice phone is (206) 386-6000.
- Swedish Medical Center -First Hill747 Broadway, Seattle, WA 98122 · King CountyPhone(206) 386-6000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. William Chiang is affiliated with 4 sites of care and 2 medical groups
Dr. Chiang's primary practice is Swedish Medical Center -First Hill in Seattle, Washington. Dr. Chiang is also affiliated with Swedish First Hill Campus. The medical group on file is Seattle Emergency Physicians Services. Dmand AI also links Dr. Chiang to 2 more hospitals and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. William Chiang's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chiang practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Swedish Medical Center -First Hill | Available with a free account |
| +3 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. William Chiang is one of 1,408 emergency medicine physicians in Washington
Emergency medicine is Dr. Chiang's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Chiang is licensed in California.
Specialties and state licenses
- Emergency medicine, CaliforniaPrimary
Emergency medicine physicians near Dr. Chiang
Counts of emergency medicine physicians with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. William Chiang billed Medicare for 206 services in 2024
CMS data shows 206 Medicare services from Dr. Chiang across 6 procedure codes in 2024, for 139 Medicare patients. Medicare paid $19,220 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Chiang's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1612024: 13516%
- Tests and treatments
- 2023: 1162024: 7139%
Dr. Chiang compared with the Washington median for emergency medicine physicians, 2024
- Dr. Chiang
- Washington median
- Medicare services
- 206vs 26823% below
- Medicare patients
- 139vs 22338% below
- Part D claims
- 15vs 6175% below
Medians across 1,440 emergency medicine physicians in Washington with Dmand AI profiles that report each measure.
Dr. Chiang's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. William Chiang treated 139 Medicare patients in 2024, average age 70
CMS counts 139 Medicare patients who saw Dr. Chiang in 2024. The largest group is 65 to 74, with 41 patients. 74% of them have high blood pressure, and 59% have high cholesterol. 40% are also on Medicaid. Their average risk score is 2.07, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Chiang's median patient age at 49, with 48% women.
Dr. Chiang's Medicare patients by age, 2024
Dr. Chiang's Medicare patients by sex, 2024
- Women6446%
- Men7554%
Chronic conditions among Dr. Chiang's Medicare patients, 2024
- High blood pressure74%
- High cholesterol59%
- Mood disorders49%
- Anxiety47%
- Arthritis47%
- Depression45%
- Ischemic heart disease34%
- Alcohol and drug use disorders33%
Share of Medicare patients with each condition. A patient can have several.
Dr. Chiang's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 49
Patient panel by sex, all payers
- Women48%
- Men51%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. William Chiang wrote 62 Medicare Part D claims in 2024
In 2024, Dr. Chiang wrote 62 Medicare Part D claims for 52 patients. 87% of them were for generic drugs. CMS names the drug for 15 of them, across 1 drug with 11 or more claims each, at $209 in total drug cost.
Dr. Chiang's Part D claims by kind of drug, 2024
- Generic54 claims87%
- Brand-name and other8 claims13%
Dr. Chiang's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Chiang's Part D claims, 2024
- Antibiotics40%25 of 62 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. William Chiang scored 91 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 91 out of 100 for Dr. Chiang for performance year 2024, reported as part of a group. Dr. Chiang accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Chiang's MIPS scores, performance year 2024
- 91of 100Final score
- 84.9of 100Quality
- 40of 100Improvement Activities
- 78of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. William Chiang graduated from State University of New York Downstate Medical Center
Dr. Chiang graduated from State University of New York Downstate Medical Center in 2015.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. William Chiang's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. William Chiang
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. William Chiang's NPI number?
Dr. William Chiang's NPI number is 1417336165. It was assigned on May 28, 2015, and it is active in the NPI Registry.
What kind of doctor is Dr. William Chiang?
Dr. William Chiang is an emergency medicine physician in Seattle, Washington. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. William Chiang practice?
Dr. Chiang practices at 747 Broadway, Seattle, WA 98122. Dr. Chiang's primary practice is Swedish Medical Center -First Hill in Seattle, Washington. Dmand AI also links Dr. Chiang to 2 hospitals and 1 medical group.
What is Dr. William Chiang's office phone number?
The practice phone on file for Dr. Chiang is (206) 386-6000.
What is Dr. William Chiang's medical license number?
Dr. Chiang holds California license A162279.
Which hospitals is Dr. William Chiang affiliated with?
Dr. Chiang is affiliated with Swedish First Hill Campus. Dmand AI links Dr. Chiang to 2 more hospitals.
What medical group is Dr. William Chiang part of?
Dr. Chiang is linked to Seattle Emergency Physicians Services. Dmand AI links Dr. Chiang to 1 more medical group.
Does Dr. William Chiang accept Medicare?
Yes. CMS data shows Dr. Chiang billed Medicare for 206 services in 2024, and Dr. Chiang accepts Medicare assignment.
What is Dr. William Chiang's MIPS score?
Dr. Chiang's MIPS final score for performance year 2024 is 91 out of 100, reported as part of a group.
How many Medicare patients does Dr. William Chiang see?
CMS counts 139 Medicare patients who saw Dr. Chiang in 2024, with an average age of 70.
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What services does Dr. William Chiang bill to Medicare?
In 2024, Dr. Chiang's most billed Medicare services were emergency department visit (99285), heart test or procedure (93010) and critical care (99291).
Where did Dr. William Chiang go to medical school?
Dr. Chiang graduated from State University of New York Downstate Medical Center in 2015.
What drugs does Dr. William Chiang prescribe most?
In 2024 Medicare Part D data, Dr. Chiang's most prescribed drugs by claims were Cephalexin.
How long has Dr. William Chiang been practicing?
Dr. Chiang graduated from medical school in 2015, 11 years ago.
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