Dr. William Shyy, MD

  • Los Angeles, CA
  • Emergency medicine physician
NPI1013202274
Medicare services, 2024
560
Medicare patients, 2024
532
Part D claims, 2024
125
Publications
14
MIPS score, 2024
100
Practice address
200 Medical Plz, Los Angeles, CA 90024
Practice phone
Call (310) 794-9206
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

Peter Morton UCLA Medical Building

Los Angeles, California

See all 8 affiliations

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Dr. William Shyy is an emergency medicine physician in Los Angeles, California

Dr. Shyy practices at Peter Morton UCLA Medical Building in Los Angeles, California.

Dr. Shyy's NPI, 1013202274, was assigned on June 16, 2011. Dr. Shyy graduated from Carver College of Medicine in 2011. Dr. Shyy's California license number on file is A130299.

NPI and contact details
NPI enumeration date
June 16, 2011
NPI status
Active
Practice phone
(310) 794-9206
Professional email
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Personal email
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Mobile number
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Sex
Male
Estimated age
41
Medical school graduation
2011

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data

Dr. William Shyy practices at Peter Morton UCLA Medical Building in Los Angeles, California

Dr. Shyy's primary practice is Peter Morton UCLA Medical Building, at 200 Medical Plz, Los Angeles, CA 90024 in Los Angeles County. The practice phone is (310) 794-9206.

  • Peter Morton UCLA Medical Building
    200 Medical Plz, Los Angeles, CA 90024 · Los Angeles CountyPhone(310) 794-9206

Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data

Dr. William Shyy is affiliated with 3 sites of care and 5 medical groups

Dr. Shyy's primary practice is Peter Morton UCLA Medical Building in Los Angeles, California. Dr. Shyy is also affiliated with UCSF Helen Diller Medical Center at Parnassus Heights. The medical group on file is UCSF Medical Group. Dmand AI also links Dr. Shyy to 1 more hospital and 4 medical groups, each named with a free account.

See all 8 affiliations for Dr. Shyy

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 Shyy's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Shyy practices, 2 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
Peter Morton UCLA Medical BuildingAvailable with a free account
+2 more sites and 4 medical groupsAvailable with a free account

Source: Dmand AI Technology Install Data

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Dr. William Shyy is one of 7,423 emergency medicine physicians in California

Emergency medicine is Dr. Shyy's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Shyy is board certified in emergency medicine by the American Board of Emergency Medicine. Dmand AI has Dr. Shyy's licenses on file in 2 states: California and Illinois.

Specialties and state licenses

  • Emergency medicine, CaliforniaPrimaryLicense A130299 · 2014 to 2025 · taxonomy 207P00000X
  • Illinois licenseLicense 125-059672 · 2011 to 2014

Emergency medicine physicians near Dr. Shyy

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 Shyy billed Medicare for 560 services in 2024

CMS data shows 560 Medicare services from Dr. Shyy across 5 procedure codes in 2024, for 532 Medicare patients. Medicare paid $64,282 for them. Every service was in a facility, such as a hospital, rather than an office.

Medicare services, 2024560
Medicare patients532
Paid by Medicare$64,282
Procedure codes5

Dr. Shyy's Medicare services by type, 2023 to 2024

  • 2023
  • 2024
Office and hospital visits
2023: 3882024: 54841%
Tests and treatments
2023: 02024: 12

Dr. Shyy compared with the California median for emergency medicine physicians, 2024

  • Dr. Shyy
  • California median
Medicare services
560vs 2652.1 times
Medicare patients
532vs 2432.2 times
Part D claims
23vs 6263% below

Medians across 7,079 emergency medicine physicians in California with Dmand AI profiles that report each measure.

Dr. Shyy'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.

See all procedures by Dr. Shyy

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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks

Dr. William Shyy treated 532 Medicare patients in 2024, average age 75

CMS counts 532 Medicare patients who saw Dr. Shyy in 2024. The largest group is 65 to 74, with 169 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 46% are also on Medicaid. Their average risk score is 2.72, 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. Shyy's median patient age at 45, with 50% women.

Medicare patients, 2024532
Average age75
Average risk score2.72
Also on Medicaid46%

Dr. Shyy's Medicare patients by age, 2024

Dr. Shyy's Medicare patients by sex, 2024

  • Women27452%
  • Men25848%

Chronic conditions among Dr. Shyy's Medicare patients, 2024

  1. High blood pressure75%
  2. High cholesterol75%
  3. Arthritis63%
  4. Ischemic heart disease47%
  5. Chronic kidney disease43%
  6. Diabetes43%
  7. Mood disorders43%
  8. Anxiety41%

Share of Medicare patients with each condition. A patient can have several.

Dr. Shyy's patients across all payers

Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.

Patient panel by age, all payers

Median age 45

Patient panel by sex, all payers

  • Women50%
  • Men49%

Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data

Dr. William Shyy wrote 125 Medicare Part D claims in 2024

In 2024, Dr. Shyy wrote 125 Medicare Part D claims for 90 patients. 89% of them were for generic drugs. CMS names the drug for 23 of them, across 2 drugs with 11 or more claims each, at $91 in total drug cost.

Part D claims, 2024125
Drugs named by CMS2
Total drug cost$91
Part D patients90

Dr. Shyy's Part D claims by kind of drug, 2024

  • Generic111 claims89%
  • Brand-name and other14 claims11%

Dr. Shyy's most prescribed drugs by claims, 2023

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. Shyy's Part D claims, 2024

  • Opioids16%20 of 125 claims
  • Antibiotics30%37 of 125 claims

Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.

See all prescribing by Dr. Shyy

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 Shyy scored 100 out of 100 in Medicare's MIPS program for 2024

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 100 out of 100 for Dr. Shyy for performance year 2024, reported as part of a group.

Dr. Shyy's MIPS scores, performance year 2024

  • 100of 100Final score
  • 93.3of 100Quality
  • 100of 100Promoting Interoperability
  • 40of 100Improvement Activities
  • 80of 100Cost

Each score is out of 100. The final score weighs the categories CMS scored for this clinician.

Source: Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026

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Dr. William Shyy has 14 publications on record

Dmand AI links 14 papers to Dr. Shyy, published from 2009 to 2023. 2017 was the busiest year, with 2. The most frequent topics are Ultrasonography, Diagnosis, Differential and Point-of-Care Systems. Dr. Shyy has published most often in Emerg Med J. Dr. Shyy's most frequent co-authors are Roneesha Starr Knight, MD, Nathan A. Teismann, MD and Aaron Edward Kornblith, MD.

Papers14
Years published2009 to 2023

Dr. Shyy's papers by year, 2009 to 2023

Topics Dr. Shyy writes about most

  • Ultrasonography
  • Diagnosis, Differential
  • Point-of-Care Systems
  • Emergency Service, Hospital
  • Tomography, X-Ray Computed
  • Abdominal Pain
  • Clubfoot
  • Exons

Dr. Shyy's most frequent co-authors

Recent publications by Dr. Shyy

See all 14 publications and co-authors

See who Dr. Shyy researches with

Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Shyy works with, so you can find a warm path to the right emergency medicine physicians.

How network discovery works

Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage

Dr. William Shyy received $248 in industry payments from 2024 to 2025

CMS Open Payments shows 3 general payments to Dr. Shyy from 1 drug or device company from 2024 to 2025. Food and beverage make up the largest share, 100% of the total. Eli Lilly and Company paid the most, $248.

General payments to Dr. Shyy by program year, 2024 to 2025

Companies that paid Dr. Shyy the most, 2024 to 2025

Share is of all general payments to this clinician.

See all payments to Dr. Shyy

Source: Open Payments (CMS), 2025 data, released July 7, 2026

Dr. William Shyy graduated from Carver College of Medicine

Dr. Shyy graduated from Carver College of Medicine in 2011.

  1. Medical schoolCarver College of Medicine
  2. Board certified in emergency medicineAmerican Board of Emergency Medicine

Source: Dmand AI Professional Profile Data

Dr. William Shyy accepts plans from 4 insurance carriers

Dr. Shyy is in network with 4 carriers, including United Healthcare, Blue Cross and Blue Shield of Kansas City and Elevance. HMO plans come from the most carriers, 3. Check the plan with the practice before a visit.

  • United Healthcare
  • Blue Cross and Blue Shield of Kansas City
  • Elevance
  • LA Care

Plan types Dr. Shyy accepts, by number of carriers

  1. HMO3
  2. EPO1
  3. POS1

Source: Dmand AI Insurance Network Data

Sources for Dr. William Shyy's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data
Primary practice, affiliations and health systemNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation DataDmand AI Org Hierarchy Data
Medicare services and procedure codesMedicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab)
State medians for the same specialtyDmand AI Peer Benchmarks
Medicare patients and the all-payer patient panelDmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab)
Part D prescribingMedicare 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 percentilesClinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)
Publications, topics and co-authorsPubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage
Industry paymentsOpen Payments (CMS) (opens in a new tab)
Training, board certification and membershipsDmand AI Professional Profile Data
Insurance carriers and plan typesDmand AI Insurance Network Data
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand AI Affiliation Data

Data last refreshed October 2026Report an inaccuracyRemove my information

FAQ

Frequently asked questions about Dr. William Shyy

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 Shyy's NPI number?

Dr. William Shyy's NPI number is 1013202274. It was assigned on June 16, 2011, and it is active in the NPI Registry.

What kind of doctor is Dr. William Shyy?

Dr. William Shyy is an emergency medicine physician in Los Angeles, California. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).

Where does Dr. William Shyy practice?

Dr. Shyy practices at 200 Medical Plz, Los Angeles, CA 90024. Dr. Shyy's primary practice is Peter Morton UCLA Medical Building in Los Angeles, California. Dmand AI also links Dr. Shyy to 1 hospital and 4 medical groups.

What is Dr. William Shyy's office phone number?

The practice phone on file for Dr. Shyy is (310) 794-9206.

What is Dr. William Shyy's medical license number?

Dr. Shyy's California license number on file is A130299, one of the licenses on file in 2 states.

Which states has Dr. William Shyy been licensed in?

Dmand AI has state licenses on file for Dr. Shyy in California (2014 to 2025) and Illinois (2011 to 2014).

Which hospitals is Dr. William Shyy affiliated with?

Dr. Shyy is affiliated with UCSF Helen Diller Medical Center at Parnassus Heights. Dmand AI links Dr. Shyy to 1 more hospital.

What medical group is Dr. William Shyy part of?

Dr. Shyy is linked to UCSF Medical Group. Dmand AI links Dr. Shyy to 4 more medical groups.

Does Dr. William Shyy accept Medicare?

Yes. CMS data shows Dr. Shyy billed Medicare for 560 services in 2024.

What is Dr. William Shyy's MIPS score?

Dr. Shyy's MIPS final score for performance year 2024 is 100 out of 100, reported as part of a group.

Show 10 more questionsShow fewer questions

How many Medicare patients does Dr. William Shyy see?

CMS counts 532 Medicare patients who saw Dr. Shyy in 2024, with an average age of 75.

Is Dr. William Shyy board certified?

Yes. Dr. Shyy is board certified in emergency medicine by the American Board of Emergency Medicine.

What services does Dr. William Shyy bill to Medicare?

In 2024, Dr. Shyy's most billed Medicare services were emergency department visit (99285), emergency department visit (99284) and emergency department visit (99283).

Where did Dr. William Shyy go to medical school?

Dr. Shyy graduated from Carver College of Medicine in 2011.

What drugs does Dr. William Shyy prescribe most?

In 2023 Medicare Part D data, Dr. Shyy's most prescribed drugs by claims were Oxycodone-Acetaminophen and Oxycodone HCl.

Has Dr. William Shyy received payments from drug or device companies?

CMS Open Payments shows $248 in general payments to Dr. Shyy from 1 company from 2024 to 2025. The largest total came from Eli Lilly and Company.

How long has Dr. William Shyy been practicing?

Dr. Shyy graduated from medical school in 2011, 15 years ago.

Does Dr. William Shyy do research?

Dmand AI links 14 publications to Dr. Shyy, published from 2009 to 2023.

Who does Dr. William Shyy publish with?

Dr. Shyy's most frequent co-authors are Roneesha Starr Knight, MD (8 shared papers), Nathan A. Teismann, MD (6 shared papers) and Aaron Edward Kornblith, MD (2 shared papers).

What insurance does Dr. William Shyy accept?

Dr. Shyy is in network with 4 carriers, including United Healthcare, Blue Cross and Blue Shield of Kansas City and Elevance. HMO plans come from the most carriers, 3. Check the plan with the practice before a visit.

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