Dr. Cynthia Chyn Tsui, MD

  • Richmond, CA
  • Nephrologist
NPI1942476940PAC ID2668525908
Medicare services, 2024
1,988
Medicare patients, 2024
138
Part D claims, 2024
73
Publications
10
MIPS score, 2024
100
Practice address
901 Nevin Ave, Richmond, CA 94801
Practice phone
Call (510) 307-3173
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

Richmond Medical Center

Richmond, California

See all 6 affiliations

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Dr. Cynthia Chyn Tsui is a nephrologist in Richmond, California

Dr. Tsui practices at Richmond Medical Center in Richmond, California.

Dr. Tsui's NPI, 1942476940, was assigned on April 30, 2008. Dr. Tsui graduated from Saint Louis University School Of Medicine in 2000. Dr. Tsui holds California license C138840.

NPI and contact details
Medicare PAC ID
2668525908
NPI enumeration date
April 30, 2008
NPI status
Active
Accepts Medicare assignment
Yes
Practice phone
(510) 307-3173
Professional email
Get email
Personal email
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Mobile number
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Sex
Female
Estimated age
52
Medical school graduation
2000

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

Dr. Cynthia Chyn Tsui practices at Richmond Medical Center in Richmond, California

Dr. Tsui's primary practice is Richmond Medical Center, at 901 Nevin Ave, Richmond, CA 94801 in Contra Costa County. The practice phone is (510) 307-3173.

  • Richmond Medical Center
    901 Nevin Ave, Richmond, CA 94801 · Contra Costa CountyPhone(510) 307-3173

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

Dr. Cynthia Chyn Tsui is affiliated with 6 sites of care

Dr. Tsui's primary practice is Richmond Medical Center in Richmond, California. Dr. Tsui is also affiliated with Alta Bates Summit Medical Center | Alta Bates Campus. Dmand AI also links Dr. Tsui to 3 more hospitals and 1 physician office, each named with a free account.

See all 6 affiliations for Dr. Tsui

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. Cynthia Chyn Tsui's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Tsui practices, 5 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
Richmond Medical CenterAvailable with a free account
+5 more affiliated sitesAvailable with a free account

Source: Dmand AI Technology Install Data

For health IT teams

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Dr. Cynthia Chyn Tsui is one of 1,401 nephrologists in California

Nephrology is Dr. Tsui's primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dr. Tsui is board certified in nephrology by the American Board of Internal Medicine. Dmand AI has Dr. Tsui's licenses on file in 2 states: California and Michigan.

Specialties and state licenses

  • Nephrology, CaliforniaPrimaryLicense C138840 · 2015 to 2027 · taxonomy 207RN0300X
  • Michigan license2008 to 2019

Nephrologists near Dr. Tsui

Counts of nephrologists with a Dmand AI profile, by place and practice. Each opens the list.

1,401nephrologists in California
8nephrologists in Richmond

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

Dr. Cynthia Chyn Tsui billed Medicare for 1,988 services in 2024

CMS data shows 1,988 Medicare services from Dr. Tsui across 6 procedure codes in 2024, for 138 Medicare patients. Medicare paid $150,916 for them. Every service was in a facility, such as a hospital, rather than an office.

Medicare services, 20241,988
Medicare patients138
Paid by Medicare$150,916
Procedure codes6

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

  • 2023
  • 2024
Office and hospital visits
2023: 1,2372024: 1,91755%
Tests and treatments
2023: 1012024: 7130%

Dr. Tsui compared with the California median for nephrologists, 2024

  • Dr. Tsui
  • California median
Medicare services
1,988vs 1,08483% above
Medicare patients
138vs 30755% below
Part D claims
31vs 95597% below

Medians across 1,355 nephrologists in California with Dmand AI profiles that report each measure.

Dr. Tsui'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. Tsui

Need commercial claims for Dr. Tsui?

Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Tsui and other nephrologists in California.

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

Dr. Cynthia Chyn Tsui treated 138 Medicare patients in 2024, average age 76

CMS counts 138 Medicare patients who saw Dr. Tsui in 2024. The largest group is 75 to 84, with 51 patients. 75% of them have chronic kidney disease, and 75% have diabetes. 64% are also on Medicaid. Their average risk score is 5.47, 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. Tsui's median patient age at 70, with 47% women.

Medicare patients, 2024138
Average age76
Average risk score5.47
Also on Medicaid64%

Dr. Tsui's Medicare patients by age, 2024

Dr. Tsui's Medicare patients by sex, 2024

  • Women7051%
  • Men6849%

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

  1. Chronic kidney disease75%
  2. Diabetes75%
  3. High blood pressure75%
  4. High cholesterol75%
  5. Heart failure66%
  6. Ischemic heart disease61%
  7. Atrial fibrillation45%
  8. Arthritis43%

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

Dr. Tsui's patients across all payers

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

Patient panel by age, all payers

Median age 70

Patient panel by sex, all payers

  • Women47%
  • Men53%

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

Dr. Cynthia Chyn Tsui wrote 73 Medicare Part D claims in 2024

In 2024, Dr. Tsui wrote 73 Medicare Part D claims. 55% of them were for generic drugs. CMS names the drug for 31 of them, across 1 drug with 11 or more claims each, at $6,113 in total drug cost. In 2023, CMS named 71 claims across 1 drug.

Part D claims, 202473
Drugs named by CMS1
Total drug cost$6,113

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

  • Generic40 claims55%
  • Brand-name33 claims45%

Dr. Tsui'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.

Part D claims for drugs CMS names, 2023 to 2024

  • 2023
  • 2024
Claims for drugs CMS names
2023: 712024: 3156%

Drugs named by CMS: 1 in 2024, 1 in 2023.

See all prescribing by Dr. Tsui

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. Cynthia Chyn Tsui 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. Tsui for performance year 2024, reported as part of a group. Dr. Tsui accepts Medicare assignment, so Medicare's approved amount is taken as full payment.

Accepts Medicare assignment
Yes

Dr. Tsui's MIPS scores, performance year 2024

  • 100of 100Final score
  • 80.6of 100Quality
  • 100of 100Promoting Interoperability
  • 40of 100Improvement Activities
  • 87of 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

For MedTech and pharma teams

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Dr. Cynthia Chyn Tsui has 10 publications on record

Dmand AI links 10 papers to Dr. Tsui, published from 2007 to 2015. 2015 was the busiest year, with 2. The most frequent topics are Cells, Cultured, Neurons and Podocytes. Dr. Tsui has published most often in J Neurosci. Dr. Tsui's most frequent co-author is Sarah Jane Hein, FNP-BC.

Papers10
Years published2007 to 2015

Dr. Tsui's papers by year, 2007 to 2015

Topics Dr. Tsui writes about most

  • Cells, Cultured
  • Neurons
  • Podocytes
  • Proto-Oncogene Proteins c-ret
  • Signal Transduction
  • Superior Cervical Ganglion
  • Cell Survival
  • Cytoskeletal Proteins

Dr. Tsui's most frequent co-authors

Recent publications by Dr. Tsui

See all 10 publications and co-authors

See who Dr. Tsui researches with

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

How network discovery works

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

Dr. Cynthia Chyn Tsui received $407 in industry payments from 2016 to 2024

CMS Open Payments shows 8 general payments to Dr. Tsui from 5 drug and device companies from 2016 to 2024. Food and beverage make up the largest share, 100% of the total. Fresenius USA Marketing, Inc. paid the most, $271.

General payments to Dr. Tsui by program year, 2016 to 2024

Companies that paid Dr. Tsui the most, 2016 to 2024

Share is of all general payments to this clinician.

See all payments to Dr. Tsui

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

Dr. Cynthia Chyn Tsui graduated from Saint Louis University School Of Medicine

Dr. Tsui graduated from Saint Louis University School Of Medicine in 2000. Dr. Tsui is a member of ASN.

  1. Medical schoolSaint Louis University School Of Medicine
  2. Board certified in nephrologyAmerican Board of Internal Medicine

Source: Dmand AI Professional Profile Data

Dr. Cynthia Chyn Tsui accepts plans from 8 insurance carriers

Dr. Tsui is in network with 8 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. PPO plans come from the most carriers, 7. Check the plan with the practice before a visit.

  • Aetna
  • Blue Cross Blue Shield of Michigan
  • Blue Cross Blue Shield of Massachusetts
  • Elevance
  • HCSC
  • Health Alliance Plan
  • Regence Health Plans
  • CMS Medicare

Plan types Dr. Tsui accepts, by number of carriers

  1. PPO7
  2. Medicare6
  3. POS3
  4. EPO2
  5. HMO2

Source: Dmand AI Insurance Network Data

Sources for Dr. Cynthia Chyn Tsui'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 percentilesDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician 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. Cynthia Chyn Tsui

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. Cynthia Chyn Tsui's NPI number?

Dr. Cynthia Chyn Tsui's NPI number is 1942476940. It was assigned on April 30, 2008, and it is active in the NPI Registry.

What kind of doctor is Dr. Cynthia Chyn Tsui?

Dr. Cynthia Chyn Tsui is a nephrologist in Richmond, California. The primary specialty in the NPI Registry is Nephrology Physician (taxonomy code 207RN0300X).

Where does Dr. Cynthia Chyn Tsui practice?

Dr. Tsui practices at 901 Nevin Ave, Richmond, CA 94801. Dr. Tsui's primary practice is Richmond Medical Center in Richmond, California. Dmand AI also links Dr. Tsui to 3 hospitals and 1 physician office.

What is Dr. Cynthia Chyn Tsui's office phone number?

The practice phone on file for Dr. Tsui is (510) 307-3173.

What is Dr. Cynthia Chyn Tsui's medical license number?

Dr. Tsui holds California license C138840, one of the licenses on file in 2 states.

Which states has Dr. Cynthia Chyn Tsui been licensed in?

Dmand AI has state licenses on file for Dr. Tsui in California (2015 to 2027) and Michigan (2008 to 2019).

Which hospitals is Dr. Cynthia Chyn Tsui affiliated with?

Dr. Tsui is affiliated with Alta Bates Summit Medical Center | Alta Bates Campus. Dmand AI links Dr. Tsui to 3 more hospitals.

Does Dr. Cynthia Chyn Tsui accept Medicare?

Yes. CMS data shows Dr. Tsui billed Medicare for 1,988 services in 2024, and Dr. Tsui accepts Medicare assignment.

What is Dr. Cynthia Chyn Tsui's MIPS score?

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

How many Medicare patients does Dr. Cynthia Chyn Tsui see?

CMS counts 138 Medicare patients who saw Dr. Tsui in 2024, with an average age of 76.

Show 9 more questionsShow fewer questions

Is Dr. Cynthia Chyn Tsui board certified?

Yes. Dr. Tsui is board certified in nephrology by the American Board of Internal Medicine.

What services does Dr. Cynthia Chyn Tsui bill to Medicare?

In 2024, Dr. Tsui's most billed Medicare services were hospital inpatient care (99232), hospital inpatient care (99233) and hospital inpatient care (99231).

Where did Dr. Cynthia Chyn Tsui go to medical school?

Dr. Tsui graduated from Saint Louis University School Of Medicine in 2000.

What drugs does Dr. Cynthia Chyn Tsui prescribe most?

In 2024 Medicare Part D data, Dr. Tsui's most prescribed drugs by claims were Prosol.

Has Dr. Cynthia Chyn Tsui received payments from drug or device companies?

CMS Open Payments shows $407 in general payments to Dr. Tsui from 5 companies from 2016 to 2024. The largest total came from Fresenius USA Marketing, Inc.

How long has Dr. Cynthia Chyn Tsui been practicing?

Dr. Tsui graduated from medical school in 2000, 26 years ago.

Does Dr. Cynthia Chyn Tsui do research?

Dmand AI links 10 publications to Dr. Tsui, published from 2007 to 2015.

Who does Dr. Cynthia Chyn Tsui publish with?

Dr. Tsui's most frequent co-authors are Sarah Jane Hein, FNP-BC (1 shared paper).

What insurance does Dr. Cynthia Chyn Tsui accept?

Dr. Tsui is in network with 8 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. PPO plans come from the most carriers, 7. Check the plan with the practice before a visit.

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