Transplantation
Dr. May Y. Chiu, MD
- Medicare services, 2024
- 2,565
- Medicare patients, 2024
- 476
- Part D claims, 2024
- 857
- Publications
- 1
- MIPS score, 2024
- 100
- Practice address
- 4501 Sand Creek Road, Antioch, CA 94531
- Practice phone
- Call (925) 813-6500
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Chiu'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. May Y. Chiu is a nephrologist in Antioch, California
Dr. Chiu practices at Antioch Medical Center in Antioch, California, part of Kaiser Permanente.
Dr. Chiu's NPI, 1407857329, was assigned on August 2, 2005. Dr. Chiu graduated from Albany Medical College in 1991. Dr. Chiu's California license number on file is G84473.
- NPI
- 1407857329NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5395655328
- NPI enumeration date
- August 2, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (925) 813-6500
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 61
- Medical school graduation
- 1991
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. May Y. Chiu practices at Antioch Medical Center in Antioch, California
Dr. Chiu's primary practice is Antioch Medical Center, at 4501 Sand Creek Road, Antioch, CA 94531 in Contra Costa County. The practice phone is (925) 813-6500.
- Antioch Medical Center4501 Sand Creek Road, Antioch, CA 94531 · Contra Costa CountyPhone(925) 813-6500
Source: Dmand AI Affiliation Data
Dr. May Y. Chiu is affiliated with 9 sites of care and 2 medical groups
Dr. Chiu's primary practice is Antioch Medical Center in Antioch, California, part of Kaiser Permanente. Dr. Chiu is also affiliated with Sutter Delta Medical Center. The medical group on file is John Muir Health. Dmand AI also links Dr. Chiu to 3 more hospitals, 2 dialysis centers, 2 group practices and clinics and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. May Y. Chiu's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chiu practices, 9 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Antioch Medical Center | Available with a free account |
| +8 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. May Y. Chiu is one of 1,401 nephrologists in California
Nephrology is Dr. Chiu's primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dr. Chiu is board certified in nephrology by the American Board of Internal Medicine. Dmand AI has Dr. Chiu's licenses on file in 3 states: California, Oregon and Illinois.
Specialties and state licenses
- Nephrology, CaliforniaPrimary
- Oregon license
- Illinois license
Clinical focus
Dmand AI lists acute kidney failure, chronic anemia, chronic kidney disease, fluid and electrolyte imbalances and kidney cysts among the conditions Dr. Chiu treats.
Nephrologists near Dr. Chiu
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. May Y. Chiu billed Medicare for 2,565 services in 2024
CMS data shows 2,565 Medicare services from Dr. Chiu across 14 procedure codes in 2024, for 476 Medicare patients. Medicare paid $292,732 for them.
Dr. Chiu's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1,3812024: 1,81031%
- Other services
- 2023: 02024: 393
- Tests and treatments
- 2023: 3292024: 3445%
- Lab and pathology
- 2023: 212024: 1814%
Where Dr. Chiu's Medicare services took place, 2024
- In an office1,54260%
- In a facility1,02340%
Dr. Chiu compared with the California median for nephrologists, 2024
- Dr. Chiu
- California median
- Medicare services
- 2,565vs 1,0842.4 times
- Medicare patients
- 476vs 30755% above
- Part D claims
- 670vs 95530% below
Medians across 1,355 nephrologists in California with Dmand AI profiles that report each measure.
Dr. Chiu'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.
Need commercial claims for Dr. Chiu?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Chiu and other nephrologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. May Y. Chiu treated 476 Medicare patients in 2024, average age 74
CMS counts 476 Medicare patients who saw Dr. Chiu in 2024. The largest group is 75 to 84, with 162 patients. 75% of them have chronic kidney disease, and 75% have high blood pressure. 46% are also on Medicaid. Their average risk score is 4.75, 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. Chiu's median patient age at 71, with 49% women.
Dr. Chiu's Medicare patients by age, 2024
Dr. Chiu's Medicare patients by sex, 2024
- Women23048%
- Men24652%
Chronic conditions among Dr. Chiu's Medicare patients, 2024
- Chronic kidney disease75%
- High blood pressure75%
- High cholesterol75%
- Diabetes64%
- Heart failure57%
- Ischemic heart disease49%
- Arthritis44%
- Atrial fibrillation40%
Share of Medicare patients with each condition. A patient can have several.
Dr. Chiu's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 71
Patient panel by sex, all payers
- Women49%
- Men49%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. May Y. Chiu wrote 857 Medicare Part D claims in 2024
In 2024, Dr. Chiu wrote 857 Medicare Part D claims for 164 patients. 91% of them were for generic drugs. CMS names the drug for 670 of them, across 18 drugs with 11 or more claims each, at $32,086 in total drug cost. In 2023, CMS named 503 claims across 11 drugs.
Dr. Chiu's Part D claims by kind of drug, 2024
- Generic776 claims91%
- Brand-name81 claims9%
Dr. Chiu'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. Chiu's Part D claims, 2024
- Antibiotics4%33 of 857 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: 5032024: 67033%
Drugs named by CMS: 18 in 2024, 11 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. May Y. Chiu 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. Chiu for performance year 2024, reported individually. Dr. Chiu accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Chiu as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Dr. Chiu's MIPS scores, performance year 2024
- 100of 100Final score
- 81.9of 100Quality
- 99of 100Promoting Interoperability
- 40of 100Improvement Activities
- 85of 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. May Y. Chiu has 1 publication on record
Dmand AI links 1 paper to Dr. Chiu.
Recent publications by Dr. Chiu
See who Dr. Chiu researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Chiu 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. May Y. Chiu received $2,134 in industry payments from 2016 to 2025
CMS Open Payments shows 71 general payments to Dr. Chiu from 15 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 99% of the total. Fresenius USA Marketing, Inc. paid the most, $608.
General payments to Dr. Chiu by program year, 2016 to 2025
General payments to Dr. Chiu by kind, 2016 to 2025
- Food and beverage$2,11399%
- Education$211%
Companies that paid Dr. Chiu 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. May Y. Chiu has 2 awards and honors on record
Dmand AI lists 2 awards for Dr. Chiu, most recently Regional Top Doctor in 2014.
Awards and honors for Dr. Chiu
- 2014
- Regional Top Doctor
- 2011
- CMS Stage 1 2012
Source: Dmand AI Professional Profile Data
Dr. May Y. Chiu graduated from Albany Medical College
Dr. Chiu graduated from Albany Medical College in 1991.
- Medical school
- Board certified in nephrology
Source: Dmand AI Professional Profile Data
Dr. May Y. Chiu accepts plans from 16 insurance carriers
Dr. Chiu is in network with 16 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 10. Check the plan with the practice before a visit.
- Aetna
- Elevance
- Blue Cross Blue Shield of Michigan
- United Healthcare
- HCSC
- Alliant Health Plans
- Blue Cross Blue Shield of Massachusetts
- Kaiser Permanente
- +8 more carriersWith a free account
Plan types Dr. Chiu accepts, by number of carriers
- PPO10
- Medicare8
- HMO7
- POS7
- EPO4
Source: Dmand AI Insurance Network Data
Sources for Dr. May Y. Chiu'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 | Dmand AI Affiliation 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) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network 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. May Y. Chiu
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. May Y. Chiu's NPI number?
Dr. May Y. Chiu's NPI number is 1407857329. It was assigned on August 2, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. May Y. Chiu?
Dr. May Y. Chiu is a nephrologist in Antioch, California. The primary specialty in the NPI Registry is Nephrology Physician (taxonomy code 207RN0300X).
Where does Dr. May Y. Chiu practice?
Dr. Chiu practices at 4501 Sand Creek Road, Antioch, CA 94531. Dr. Chiu's primary practice is Antioch Medical Center in Antioch, California, part of Kaiser Permanente. Dmand AI also links Dr. Chiu to 3 hospitals, 2 dialysis centers, 2 group practices and clinics and 1 medical group.
What is Dr. May Y. Chiu's office phone number?
The practice phone on file for Dr. Chiu is (925) 813-6500.
What is Dr. May Y. Chiu's medical license number?
Dr. Chiu's California license number on file is G84473, one of the licenses on file in 3 states.
Which states has Dr. May Y. Chiu been licensed in?
Dmand AI has state licenses on file for Dr. Chiu in California (1998 to 2025), Oregon (since 1992) and Illinois (1994 to 1999).
Which hospitals is Dr. May Y. Chiu affiliated with?
Dr. Chiu practices at Antioch Medical Center in Antioch, California. Dr. Chiu is also affiliated with Sutter Delta Medical Center. Dmand AI links Dr. Chiu to 3 more hospitals.
What medical group is Dr. May Y. Chiu part of?
Dr. Chiu is linked to John Muir Health. Dmand AI links Dr. Chiu to 1 more medical group.
Does Dr. May Y. Chiu accept Medicare?
Yes. CMS data shows Dr. Chiu billed Medicare for 2,565 services in 2024, and Dr. Chiu accepts Medicare assignment.
Does Dr. May Y. Chiu offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Chiu as offering telehealth services.
Show 10 more questionsShow fewer questions
What is Dr. May Y. Chiu's MIPS score?
Dr. Chiu's MIPS final score for performance year 2024 is 100 out of 100, reported individually.
How many Medicare patients does Dr. May Y. Chiu see?
CMS counts 476 Medicare patients who saw Dr. Chiu in 2024, with an average age of 74.
Is Dr. May Y. Chiu board certified?
Yes. Dr. Chiu is board certified in nephrology by the American Board of Internal Medicine.
What services does Dr. May Y. Chiu bill to Medicare?
In 2024, Dr. Chiu's most billed Medicare services were hospital inpatient care (99233), medicare service (G2211) and office visit, established patient (99214).
Where did Dr. May Y. Chiu go to medical school?
Dr. Chiu graduated from Albany Medical College in 1991.
What drugs does Dr. May Y. Chiu prescribe most?
In 2024 Medicare Part D data, Dr. Chiu's most prescribed drugs by claims were Amlodipine Besylate, Losartan Potassium and Carvedilol.
Has Dr. May Y. Chiu received payments from drug or device companies?
CMS Open Payments shows $2,134 in general payments to Dr. Chiu from 15 companies from 2016 to 2025. The largest total came from Fresenius USA Marketing, Inc.
How long has Dr. May Y. Chiu been practicing?
Dr. Chiu graduated from medical school in 1991, 35 years ago.
Does Dr. May Y. Chiu do research?
Dmand AI links 1 publication to Dr. Chiu.
What insurance does Dr. May Y. Chiu accept?
Dr. Chiu is in network with 16 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 10. Check the plan with the practice before a visit.
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