Dr. Timothy Teng-Kay Yau, MD
- Medicare services, 2024
- 497
- Medicare patients, 2024
- 169
- Part D claims, 2024
- 236
- Publications
- 7
- MIPS score, 2024
- 84
- Practice address
- One Barnes-Jewish Hospital Plaza, Saint Louis, MO 63110
- Practice phone
- Call (314) 747-3000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Yau'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. Timothy Teng-Kay Yau is a nephrologist in Saint Louis, Missouri
Dr. Yau practices at Barnes-Jewish Hospital in Saint Louis, Missouri, part of BJC Health.
Dr. Yau's NPI, 1275794729, was assigned on June 18, 2008. Dr. Yau graduated from Saint Louis University School of Medicine in 2005. Dr. Yau holds Missouri license 2011016773.
- NPI
- 1275794729NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2163580291
- NPI enumeration date
- June 18, 2008
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (314) 747-3000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 47
- Medical school graduation
- 2005
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Timothy Teng-Kay Yau practices at 2 locations in Saint Louis, Missouri
Dr. Yau's primary practice is Barnes-Jewish Hospital, at One Barnes-Jewish Hospital Plaza, Saint Louis, MO 63110 in St. Louis City. The practice phone is (314) 747-3000. Dr. Yau also practices at Barnes-Jewish Hospital, 1 Barnes Jewish Hospital Plz, Saint Louis, MO 63110.
- Barnes-Jewish HospitalPrimaryOne Barnes-Jewish Hospital Plaza, Saint Louis, MO 63110 · St. Louis CityPhone(314) 747-3000
- Barnes-Jewish Hospital1 Barnes Jewish Hospital Plz, Saint Louis, MO 63110 · Saint Louis CityPhone(314) 747-3000
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; and Dmand AI Practice Data
Dr. Timothy Teng-Kay Yau is affiliated with 3 sites of care and 1 medical group
Dr. Yau's primary practice is Barnes-Jewish Hospital in Saint Louis, Missouri, part of BJC Health. Dr. Yau is also affiliated with Missouri Baptist Medical Center. The medical group on file is WashU Medicine Psychiatry. Dmand AI also links Dr. Yau to 1 more group practice or clinic, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Timothy Teng-Kay Yau's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Yau practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Barnes-Jewish Hospital | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Timothy Teng-Kay Yau is one of 249 nephrologists in Missouri
Nephrology is Dr. Yau's primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dr. Yau is licensed in Missouri.
Specialties and state licenses
- Nephrology, MissouriPrimary
Nephrologists near Dr. Yau
Counts of nephrologists 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. Timothy Teng-Kay Yau billed Medicare for 497 services in 2024
CMS data shows 497 Medicare services from Dr. Yau across 9 procedure codes in 2024, for 169 Medicare patients. Medicare paid $33,637 for them.
Dr. Yau's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 2912024: 34218%
- Tests and treatments
- 2023: 592024: 128117%
- Lab and pathology
- 2023: 262024: 274%
Where Dr. Yau's Medicare services took place, 2024
- In an office10020%
- In a facility39780%
Dr. Yau compared with the Missouri median for nephrologists, 2024
- Dr. Yau
- Missouri median
- Medicare services
- 497vs 85742% below
- Medicare patients
- 169vs 27138% below
- Part D claims
- 144vs 77982% below
Medians across 240 nephrologists in Missouri with Dmand AI profiles that report each measure.
Dr. Yau'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. Timothy Teng-Kay Yau treated 169 Medicare patients in 2024, average age 66
CMS counts 169 Medicare patients who saw Dr. Yau in 2024. The largest group is 65 to 74, with 69 patients. 75% of them have chronic kidney disease, and 75% have high blood pressure. 37% are also on Medicaid. Their average risk score is 5.48, 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. Yau's median patient age at 72, with 60% women.
Dr. Yau's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Yau's Medicare patients by sex, 2024
- Women7645%
- Men9355%
Chronic conditions among Dr. Yau's Medicare patients, 2024
- Chronic kidney disease75%
- High blood pressure75%
- High cholesterol75%
- Diabetes60%
- Heart failure57%
- Arthritis55%
- Ischemic heart disease54%
- Anxiety38%
Share of Medicare patients with each condition. A patient can have several.
Dr. Yau's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 72
Patient panel by sex, all payers
- Women60%
- Men39%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Timothy Teng-Kay Yau wrote 236 Medicare Part D claims in 2024
In 2024, Dr. Yau wrote 236 Medicare Part D claims for 48 patients. 94% of them were for generic drugs. CMS names the drug for 144 of them, across 8 drugs with 11 or more claims each, at $1,351 in total drug cost. In 2023, CMS named 97 claims across 5 drugs.
Dr. Yau's Part D claims by kind of drug, 2024
- Generic223 claims94%
- Brand-name13 claims6%
Dr. Yau'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: 972024: 14448%
Drugs named by CMS: 8 in 2024, 5 in 2023.
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. Timothy Teng-Kay Yau scored 84 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 84 out of 100 for Dr. Yau for performance year 2024, reported as part of a group. Dr. Yau accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Yau's MIPS scores, performance year 2024
- 84of 100Final score
- 71.6of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 76of 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. Timothy Teng-Kay Yau has 7 publications on record
Dmand AI links 7 papers to Dr. Yau, published from 2011 to 2023. 2020 was the busiest year, with 3. The most frequent topics are Nephrology, Education, Medical and Kidney Diseases. Dr. Yau has published most often in Am J Kidney Dis. Dr. Yau's most frequent co-authors are Eva Marie Aagaard, MD, Anna M. Burgner, MD and Dawn Jaclyn Caster, MD.
Dr. Yau's papers by year, 2011 to 2023
Topics Dr. Yau writes about most
- Nephrology
- Education, Medical
- Kidney Diseases
Dr. Yau's most frequent co-authors
- Eva Marie Aagaard, MD1 shared paper
- Anna M. Burgner, MD1 shared paper
- Dawn Jaclyn Caster, MD1 shared paper
Recent publications by Dr. Yau
Adv Chronic Kidney Dis
J Interprof Care
See who Dr. Yau researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Yau works with, so you can find a warm path to the right nephrologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Timothy Teng-Kay Yau received $6,256 in industry payments from 2016 to 2025
CMS Open Payments shows 16 general payments to Dr. Yau from 9 drug and device companies from 2016 to 2025. Consulting fees make up the largest share, 58% of the total. Travere Therapeutics, Inc. paid the most, $5,600.
General payments to Dr. Yau by program year, 2016 to 2025
General payments to Dr. Yau by kind, 2016 to 2025
- Consulting fees$3,60058%
- Speaker and faculty fees$2,00032%
- Food and beverage$4758%
- Education$1813%
Companies that paid Dr. Yau the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Timothy Teng-Kay Yau graduated from Saint Louis University School of Medicine
Dr. Yau graduated from Saint Louis University School of Medicine in 2005.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Timothy Teng-Kay Yau'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 Affiliation DataDmand AI Practice Data |
| Primary practice, affiliations and health system | Dmand 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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (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. Timothy Teng-Kay Yau
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. Timothy Teng-Kay Yau's NPI number?
Dr. Timothy Teng-Kay Yau's NPI number is 1275794729. It was assigned on June 18, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. Timothy Teng-Kay Yau?
Dr. Timothy Teng-Kay Yau is a nephrologist in Saint Louis, Missouri. The primary specialty in the NPI Registry is Nephrology Physician (taxonomy code 207RN0300X).
Where does Dr. Timothy Teng-Kay Yau practice?
Dr. Yau practices at One Barnes-Jewish Hospital Plaza, Saint Louis, MO 63110. Dr. Yau also practices at 1 Barnes Jewish Hospital Plz, Saint Louis, MO 63110. Dr. Yau's primary practice is Barnes-Jewish Hospital in Saint Louis, Missouri, part of BJC Health. Dmand AI also links Dr. Yau to 1 group practice or clinic.
What is Dr. Timothy Teng-Kay Yau's office phone number?
The practice phone on file for Dr. Yau is (314) 747-3000.
What is Dr. Timothy Teng-Kay Yau's medical license number?
Dr. Yau holds Missouri license 2011016773.
Which hospitals is Dr. Timothy Teng-Kay Yau affiliated with?
Dr. Yau practices at Barnes-Jewish Hospital in Saint Louis, Missouri. Dr. Yau is also affiliated with Missouri Baptist Medical Center.
What medical group is Dr. Timothy Teng-Kay Yau part of?
Dr. Yau is linked to WashU Medicine Psychiatry.
Does Dr. Timothy Teng-Kay Yau accept Medicare?
Yes. CMS data shows Dr. Yau billed Medicare for 497 services in 2024, and Dr. Yau accepts Medicare assignment.
What is Dr. Timothy Teng-Kay Yau's MIPS score?
Dr. Yau's MIPS final score for performance year 2024 is 84 out of 100, reported as part of a group.
How many Medicare patients does Dr. Timothy Teng-Kay Yau see?
CMS counts 169 Medicare patients who saw Dr. Yau in 2024, with an average age of 66.
Show 7 more questionsShow fewer questions
What services does Dr. Timothy Teng-Kay Yau bill to Medicare?
In 2024, Dr. Yau's most billed Medicare services were hospital inpatient care (99232), dialysis (90935) and office visit, established patient (99214).
Where did Dr. Timothy Teng-Kay Yau go to medical school?
Dr. Yau graduated from Saint Louis University School of Medicine in 2005.
What drugs does Dr. Timothy Teng-Kay Yau prescribe most?
In 2024 Medicare Part D data, Dr. Yau's most prescribed drugs by claims were Lisinopril, Furosemide and Chlorthalidone.
Has Dr. Timothy Teng-Kay Yau received payments from drug or device companies?
CMS Open Payments shows $6,256 in general payments to Dr. Yau from 9 companies from 2016 to 2025. The largest total came from Travere Therapeutics, Inc.
How long has Dr. Timothy Teng-Kay Yau been practicing?
Dr. Yau graduated from medical school in 2005, 21 years ago.
Does Dr. Timothy Teng-Kay Yau do research?
Dmand AI links 7 publications to Dr. Yau, published from 2011 to 2023.
Who does Dr. Timothy Teng-Kay Yau publish with?
Dr. Yau's most frequent co-authors are Eva Marie Aagaard, MD (1 shared paper), Anna M. Burgner, MD (1 shared paper) and Dawn Jaclyn Caster, MD (1 shared paper).
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