Dr. Lawrence Siu-Yung Chan, MD, MHA

  • Sacramento, CA
  • Dermatologist
NPI1912916263PAC ID5597895789
Medicare services, 2024
2,615
Medicare patients, 2024
792
Part D claims, 2024
845
Publications
67
MIPS score, 2024
90
Practice address
2315 Stockton Boulevard, Sacramento, CA 95817
Practice phone
Call (916) 734-2011
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

UC Davis Medical Center

Hospital · Sacramento, California

See all 6 affiliations

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Dr. Lawrence Siu-Yung Chan is a dermatologist in Sacramento, California

Dr. Chan practices at UC Davis Medical Center in Sacramento, California, part of University of California Health.

Dr. Chan's NPI, 1912916263, was assigned on August 5, 2006. Dr. Chan graduated from Perelman School of Medicine - Philadelphia in 1985. Dr. Chan holds California license G70528.

NPI and contact details
Medicare PAC ID
5597895789
NPI enumeration date
August 5, 2006
NPI status
Active
Accepts Medicare assignment
Yes
Practice phone
(916) 734-2011
Professional email
Get email
Personal email
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Mobile number
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Sex
Male
Estimated age
67
Medical school graduation
1985

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)

Dr. Lawrence Siu-Yung Chan practices at UC Davis Medical Center in Sacramento, California

Dr. Chan's primary practice is UC Davis Medical Center, at 2315 Stockton Boulevard, Sacramento, CA 95817 in Sacramento County. The practice phone is (916) 734-2011.

Source: Dmand AI Affiliation Data

Dr. Lawrence Siu-Yung Chan is affiliated with 3 sites of care and 3 medical groups

Dr. Chan's primary practice is UC Davis Medical Center in Sacramento, California, part of University of California Health. Dr. Chan is also affiliated with Hilo Benioff Medical Center. The medical group on file is UC Davis Medical Group. Dmand AI also links Dr. Chan to 2 more medical groups and 1 group practice or clinic, each named with a free account.

See all 6 affiliations for Dr. Chan

Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data

Dmand AI tracks the EHR system at Dr. Lawrence Siu-Yung Chan's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chan practices, 3 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
UC Davis Medical CenterAvailable with a free account
+2 more sites and 2 medical groupsAvailable with a free account

Source: Dmand AI Technology Install Data

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Dr. Lawrence Siu-Yung Chan is one of 1,910 dermatologists in California

Dermatology is Dr. Chan's primary specialty in the NPI Registry, under taxonomy code 207N00000X. Dr. Chan is board certified in clinical & laboratory dermatological immunology by the American Board of Dermatology. Dmand AI has Dr. Chan's licenses on file in 6 states: California, Florida, Texas, Hawaii, Illinois and Michigan.

Specialties and state licenses

  • Dermatology, CaliforniaPrimaryLicense G70528 · 1990 to 2026 · taxonomy 207N00000X
  • Florida license2025 to 2027
  • Texas license2025 to 2027
  • Hawaii license2025 to 2026
  • Illinois licenseLicense 036-085852 · 1993 to 2023
  • Michigan license1990 to 2018

Clinical focus

Dmand AI lists acne, acute skin infection, benign or precancerous skin growths, cancerous skin growth removal, contact dermatitis, corns and calluses, hives and itchy rashes among the conditions Dr. Chan treats.

Dermatologists near Dr. Chan

Counts of dermatologists 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. Lawrence Siu-Yung Chan billed Medicare for 2,615 services in 2024

CMS data shows 2,615 Medicare services from Dr. Chan across 15 procedure codes in 2024, for 792 Medicare patients. Medicare paid $121,755 for them. Every service was in an office.

Medicare services, 20242,615
Medicare patients792
Paid by Medicare$121,755
Procedure codes15

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

  • 2023
  • 2024
Surgery
2023: 1,4942024: 1,6309%
Office and hospital visits
2023: 9932024: 9277%
Other services
2023: 02024: 46
Tests and treatments
2023: 02024: 12

Dr. Chan compared with the California median for dermatologists, 2024

  • Dr. Chan
  • California median
Medicare services
2,615vs 1,75049% above
Medicare patients
792vs 3772.1 times
Part D claims
746vs 3672.0 times

Medians across 1,831 dermatologists in California with Dmand AI profiles that report each measure.

Dr. Chan'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. Chan

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

Dr. Lawrence Siu-Yung Chan treated 792 Medicare patients in 2024, average age 75

CMS counts 792 Medicare patients who saw Dr. Chan in 2024. The largest group is 65 to 74, with 353 patients. 74% of them have high cholesterol, and 65% have high blood pressure. 11% are also on Medicaid. Their average risk score is 1.14, where 1.00 is the Medicare average.

Across all payers, Dmand AI patient panel data puts Dr. Chan's median patient age at 65, with 49% women.

Medicare patients, 2024792
Average age75
Average risk score1.14
Also on Medicaid11%

Dr. Chan's Medicare patients by age, 2024

Dr. Chan's Medicare patients by sex, 2024

  • Women40952%
  • Men38348%

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

  1. High cholesterol74%
  2. High blood pressure65%
  3. Arthritis46%
  4. Diabetes22%
  5. Mood disorders22%
  6. Ischemic heart disease21%
  7. Depression20%
  8. Anxiety19%

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

Dr. Chan's patients across all payers

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

Patient panel by age, all payers

Median age 65

Patient panel by sex, all payers

  • Women49%
  • Men51%

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

Dr. Lawrence Siu-Yung Chan wrote 845 Medicare Part D claims in 2024

In 2024, Dr. Chan wrote 845 Medicare Part D claims for 326 patients. 86% of them were for generic drugs. CMS names the drug for 746 of them, across 20 drugs with 11 or more claims each, at $362,214 in total drug cost. In 2023, CMS named 556 claims across 17 drugs.

Part D claims, 2024845
Drugs named by CMS20
Total drug cost$362,214
Part D patients326

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

  • Generic725 claims86%
  • Brand-name and other120 claims14%

Dr. Chan'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. Chan's Part D claims, 2024

  • Antibiotics3%27 of 845 claims

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

Part D claims for drugs CMS names, 2023 to 2024

  • 2023
  • 2024
Claims for drugs CMS names
2023: 5562024: 74634%

Drugs named by CMS: 20 in 2024, 17 in 2023.

See all prescribing by Dr. Chan

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. Lawrence Siu-Yung Chan scored 90 out of 100 in Medicare's MIPS program for 2024

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 90 out of 100 for Dr. Chan for performance year 2024, reported as part of a group. Dr. Chan accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 98 procedures of removal of skin lesions by Dr. Chan, more than 75% of the clinicians it reports for that procedure.

Accepts Medicare assignment
Yes

Dr. Chan's MIPS scores, performance year 2024

  • 90of 100Final score
  • 86.2of 100Quality
  • 100of 100Promoting Interoperability
  • 40of 100Improvement Activities
  • 78of 100Cost

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

Where Dr. Chan ranks in Medicare procedure volume

Removal of skin lesions
75th percentile98 procedures
Skin biopsy
69th percentile49 procedures
Melanoma (skin cancer) excision
75th percentile21 procedures

CMS ranks each clinician against every clinician it reports for the same procedure category.

Removal or shaving of skin growth: 1 to 10 procedures (CMS shows small counts as a range)

Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)

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Dr. Lawrence Siu-Yung Chan has 67 publications on record

Dmand AI links 67 papers to Dr. Chan, published from 2006 to 2024. 2015 was the busiest year, with 4. The most frequent topics are Dermatitis, Atopic, Interleukin-4 and Disease Models, Animal. Dr. Chan has published most often in J Invest Dermatol. Dr. Chan's most frequent co-authors are Vivian Y. Shi, MD, Girish Chintamani Mohan, MD and Huayi Zhang, MD.

Papers67
Years published2006 to 2024

Dr. Chan's papers by year, 2007 to 2024

Topics Dr. Chan writes about most

  • Dermatitis, Atopic
  • Interleukin-4
  • Disease Models, Animal
  • Mice, Transgenic
  • Skin
  • Keratinocytes
  • Up-Regulation
  • Enzyme-Linked Immunosorbent Assay

Dr. Chan's most frequent co-authors

Recent publications by Dr. Chan

See all 67 publications and co-authors

See who Dr. Chan researches with

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

How network discovery works

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

Dr. Lawrence Siu-Yung Chan received $4,313 in industry payments from 2017 to 2025

CMS Open Payments shows 11 general payments to Dr. Chan from 4 drug and device companies from 2017 to 2025. Consulting fees make up the largest share, 74% of the total. Genentech, Inc. paid the most, $4,183.

General payments to Dr. Chan by program year, 2017 to 2025

General payments to Dr. Chan by kind, 2017 to 2025

$4.3Kin total
  • Consulting fees$3,20074%
  • Travel and lodging$69016%
  • Food and beverage$42310%

Companies that paid Dr. Chan the most, 2017 to 2025

Share is of all general payments to this clinician.

See all payments to Dr. Chan

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

Dr. Lawrence Siu-Yung Chan has 2 awards and honors on record

Dmand AI lists 2 awards for Dr. Chan.

Awards and honors for Dr. Chan

  1. Undated
    • AAD Fellow
    • Super Doc

Source: Dmand AI Professional Profile Data

Dr. Lawrence Siu-Yung Chan graduated from Perelman School of Medicine - Philadelphia

Dr. Chan graduated from Perelman School of Medicine - Philadelphia in 1985. Dr. Chan is a member of AAD.

  1. Medical schoolPerelman School of Medicine - Philadelphia
  2. Board certified in clinical & laboratory dermatological immunologyAmerican Board of Dermatology
  3. Board certified in dermatologyAmerican Board of Dermatology

Source: Dmand AI Professional Profile Data

Dr. Lawrence Siu-Yung Chan accepts plans from 9 insurance carriers

Dr. Chan is in network with 9 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 8. Check the plan with the practice before a visit.

  • Aetna
  • Elevance
  • Blue Cross Blue Shield of Michigan
  • United Healthcare
  • HCSC
  • Blue Cross Blue Shield of Massachusetts
  • Regence Health Plans
  • CMS Medicare
  • +1 more carriersWith a free account

Plan types Dr. Chan accepts, by number of carriers

  1. Medicare8
  2. PPO7
  3. HMO5
  4. POS4
  5. EPO2
  6. Medicaid1

Source: Dmand AI Insurance Network Data

Sources for Dr. Lawrence Siu-Yung Chan'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 phoneDmand AI Affiliation Data
Primary practice, affiliations and health systemDmand 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 percentilesDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (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)
Awards and committee rolesDmand AI Professional Profile Data
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. Lawrence Siu-Yung Chan

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. Lawrence Siu-Yung Chan's NPI number?

Dr. Lawrence Siu-Yung Chan's NPI number is 1912916263. It was assigned on August 5, 2006, and it is active in the NPI Registry.

What kind of doctor is Dr. Lawrence Siu-Yung Chan?

Dr. Lawrence Siu-Yung Chan is a dermatologist in Sacramento, California. The primary specialty in the NPI Registry is Dermatology Physician (taxonomy code 207N00000X).

Where does Dr. Lawrence Siu-Yung Chan practice?

Dr. Chan practices at 2315 Stockton Boulevard, Sacramento, CA 95817. Dr. Chan's primary practice is UC Davis Medical Center in Sacramento, California, part of University of California Health. Dmand AI also links Dr. Chan to 2 medical groups and 1 group practice or clinic.

What is Dr. Lawrence Siu-Yung Chan's office phone number?

The practice phone on file for Dr. Chan is (916) 734-2011.

What is Dr. Lawrence Siu-Yung Chan's medical license number?

Dr. Chan holds California license G70528, one of the licenses on file in 6 states.

Which states has Dr. Lawrence Siu-Yung Chan been licensed in?

Dmand AI has state licenses on file for Dr. Chan in California (1990 to 2026), Florida (2025 to 2027), Texas (2025 to 2027), Hawaii (2025 to 2026), Illinois (1993 to 2023) and Michigan (1990 to 2018).

Which hospitals is Dr. Lawrence Siu-Yung Chan affiliated with?

Dr. Chan practices at UC Davis Medical Center in Sacramento, California. Dr. Chan is also affiliated with Hilo Benioff Medical Center.

What medical group is Dr. Lawrence Siu-Yung Chan part of?

Dr. Chan is linked to UC Davis Medical Group. Dmand AI links Dr. Chan to 2 more medical groups.

Does Dr. Lawrence Siu-Yung Chan accept Medicare?

Yes. CMS data shows Dr. Chan billed Medicare for 2,615 services in 2024, and Dr. Chan accepts Medicare assignment.

What is Dr. Lawrence Siu-Yung Chan's MIPS score?

Dr. Chan's MIPS final score for performance year 2024 is 90 out of 100, reported as part of a group.

Show 10 more questionsShow fewer questions

How many Medicare patients does Dr. Lawrence Siu-Yung Chan see?

CMS counts 792 Medicare patients who saw Dr. Chan in 2024, with an average age of 75.

Is Dr. Lawrence Siu-Yung Chan board certified?

Yes. Dr. Chan is board certified in clinical & laboratory dermatological immunology by the American Board of Dermatology.

What services does Dr. Lawrence Siu-Yung Chan bill to Medicare?

In 2024, Dr. Chan's most billed Medicare services were surgery: skin and soft tissue (17003), office visit, established patient (99213) and office visit, established patient (99214).

Where did Dr. Lawrence Siu-Yung Chan go to medical school?

Dr. Chan graduated from Perelman School of Medicine - Philadelphia in 1985.

What drugs does Dr. Lawrence Siu-Yung Chan prescribe most?

In 2024 Medicare Part D data, Dr. Chan's most prescribed drugs by claims were Ketoconazole, Triamcinolone Acetonide and Fluocinonide.

Has Dr. Lawrence Siu-Yung Chan received payments from drug or device companies?

CMS Open Payments shows $4,313 in general payments to Dr. Chan from 4 companies from 2017 to 2025. The largest total came from Genentech, Inc.

How long has Dr. Lawrence Siu-Yung Chan been practicing?

Dr. Chan graduated from medical school in 1985, 41 years ago.

Does Dr. Lawrence Siu-Yung Chan do research?

Dmand AI links 67 publications to Dr. Chan, published from 2006 to 2024.

Who does Dr. Lawrence Siu-Yung Chan publish with?

Dr. Chan's most frequent co-authors are Vivian Y. Shi, MD (5 shared papers), Girish Chintamani Mohan, MD (4 shared papers) and Huayi Zhang, MD (4 shared papers).

What insurance does Dr. Lawrence Siu-Yung Chan accept?

Dr. Chan is in network with 9 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 8. Check the plan with the practice before a visit.

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