Dr. May Yen Yau, MD
- Medicare services, 2024
- 1,181
- Medicare patients, 2024
- 213
- Part D claims, 2024
- 3,040
- Clinical trials
- 2
- MIPS score, 2024
- 89
- Practice address
- 2100 Webster St Suite 423 Suite 423, San Francisco, CA 94115-2380
- Practice phone
- Call (415) 923-3878
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Pacific Internal Medicine Associates
Primary care practice · San Francisco, California
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. May Yen Yau is an internist in San Francisco, California
Dr. Yau practices at Pacific Internal Medicine Associates in San Francisco, California.
Dr. Yau's NPI, 1689786675, was assigned on August 31, 2006. Dr. Yau graduated from Feinberg School of Medicine in 1989. Dr. Yau holds California license G70229.
- NPI
- 1689786675NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2860569035
- NPI enumeration date
- August 31, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (415) 923-3878
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 63
- Medical school graduation
- 1989
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. May Yen Yau practices at Pacific Internal Medicine Associates in San Francisco, California
Dr. Yau's primary practice is Pacific Internal Medicine Associates, at 2100 Webster St Suite 423 Suite 423, San Francisco, CA 94115-2380. The practice phone is (415) 923-3878.
- Pacific Internal Medicine Associates2100 Webster St Suite 423 Suite 423, San Francisco, CA 94115-2380Phone(415) 923-3878
Source: Dmand AI Affiliation Data
Dr. May Yen Yau is affiliated with 3 sites of care and 1 medical group
Dr. Yau's primary practice is Pacific Internal Medicine Associates in San Francisco, California. Dr. Yau is also affiliated with California Pacific Medical Center Van Ness Campus. The medical group on file is Pacific Internal Medicine Associates. Dmand AI also links Dr. Yau to 1 more hospital, named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. May Yen 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 |
|---|---|
| Pacific Internal Medicine Associates | 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. May Yen Yau is one of 16,751 internists in California
Internal medicine is Dr. Yau's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Yau is board certified in internal medicine by the American Board of Internal Medicine. Dr. Yau is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Clinical focus
Dmand AI lists acute sinusitis, acute skin infection, alzheimer's disease, arthritis, atrial fibrillation and flutter, bronchitis, cardiomyopathy and chest wall injury among the conditions Dr. Yau treats.
Internists near Dr. Yau
Counts of internists 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 Yen Yau billed Medicare for 1,181 services in 2024
CMS data shows 1,181 Medicare services from Dr. Yau across 15 procedure codes in 2024, for 213 Medicare patients. Medicare paid $99,625 for them. Every service was in an office.
Dr. Yau's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 4592024: 52114%
- Other services
- 2023: 2972024: 36423%
- Tests and treatments
- 2023: 1102024: 226105%
- Lab and pathology
- 2023: 272024: 3633%
- Surgery
- 2023: 242024: 3442%
Dr. Yau compared with the California median for internists, 2024
- Dr. Yau
- California median
- Medicare services
- 1,181vs 3613.3 times
- Medicare patients
- 213vs 15141% above
- Part D claims
- 2,546vs 4216.0 times
Medians across 15,815 internists in California 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.
Need commercial claims for Dr. Yau?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Yau and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. May Yen Yau treated 213 Medicare patients in 2024, average age 75
CMS counts 213 Medicare patients who saw Dr. Yau in 2024. The largest group is 65 to 74, with 110 patients. 72% of them have high cholesterol, and 52% have high blood pressure. Their average risk score is 0.77, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Yau's median patient age at 66, with 73% women.
Dr. Yau's Medicare patients by age, 2024
Dr. Yau's Medicare patients by sex, 2024
- Women15573%
- Men5827%
Chronic conditions among Dr. Yau's Medicare patients, 2024
- High cholesterol72%
- High blood pressure52%
- Arthritis29%
- Osteoporosis24%
- Cancer22%
- Chronic kidney disease18%
- Anxiety12%
- Diabetes12%
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 66
Patient panel by sex, all payers
- Women73%
- Men19%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. May Yen Yau wrote 3,040 Medicare Part D claims in 2024
In 2024, Dr. Yau wrote 3,040 Medicare Part D claims for 298 patients. 87% of them were for generic drugs. CMS names the drug for 2,546 of them, across 48 drugs with 11 or more claims each, at $211,345 in total drug cost. In 2023, CMS named 2,543 claims across 50 drugs.
Dr. Yau's Part D claims by kind of drug, 2024
- Generic2,635 claims87%
- Brand-name and other405 claims13%
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.
Drug classes CMS tracks in Dr. Yau's Part D claims, 2024
- Antibiotics2%49 of 3,040 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: 2,5432024: 2,546No change
Drugs named by CMS: 48 in 2024, 50 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 Yen Yau scored 89 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 89 out of 100 for Dr. Yau for performance year 2024, reported individually. Dr. Yau accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Yau as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Dr. Yau's MIPS scores, performance year 2024
- 89of 100Final score
- 86.8of 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.
Removal of skin lesions: 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. May Yen Yau has worked on 2 clinical trials
Dmand AI links Dr. Yau to 2 clinical trials. Conditions studied include Angina Pectoris and Chest Pain. CardioDx sponsors the most, 2.
Conditions in Dr. Yau's trials
- Angina Pectoris
- Chest Pain
Recent clinical trials with Dr. Yau
Sources: ClinicalTrials.gov (National Library of Medicine); and Dmand AI Research Linkage
Dr. May Yen Yau received $62 in industry payments from 2016 to 2025
CMS Open Payments shows 3 general payments to Dr. Yau from 3 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Teva Pharmaceuticals USA, Inc. paid the most, $30.
General payments to Dr. Yau by program year, 2016 to 2025
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. May Yen Yau has 1 award and honors on record
Dmand AI lists 1 award for Dr. Yau, most recently CMS Stage 1 2012 in 2012.
Awards and honors for Dr. Yau
- 2012
- CMS Stage 1 2012
Source: Dmand AI Professional Profile Data
Dr. May Yen Yau graduated from Feinberg School of Medicine
Dr. Yau graduated from Feinberg School of Medicine in 1989.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. May Yen Yau accepts plans from 13 insurance carriers
Dr. Yau is in network with 13 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
- Alliant Health Plans
- +5 more carriersWith a free account
Plan types Dr. Yau accepts, by number of carriers
- Medicare8
- PPO8
- HMO6
- POS5
- EPO4
Source: Dmand AI Insurance Network Data
Sources for Dr. May Yen 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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation 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)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Clinical trials and co-investigators | ClinicalTrials.gov (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 Yen 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. May Yen Yau's NPI number?
Dr. May Yen Yau's NPI number is 1689786675. It was assigned on August 31, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. May Yen Yau?
Dr. May Yen Yau is an internist in San Francisco, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. May Yen Yau practice?
Dr. Yau practices at 2100 Webster St Suite 423 Suite 423, San Francisco, CA 94115-2380. Dr. Yau's primary practice is Pacific Internal Medicine Associates in San Francisco, California. Dmand AI also links Dr. Yau to 1 hospital.
What is Dr. May Yen Yau's office phone number?
The practice phone on file for Dr. Yau is (415) 923-3878.
What is Dr. May Yen Yau's medical license number?
Dr. Yau holds California license G70229.
Which hospitals is Dr. May Yen Yau affiliated with?
Dr. Yau is affiliated with California Pacific Medical Center Van Ness Campus. Dmand AI links Dr. Yau to 1 more hospital.
What medical group is Dr. May Yen Yau part of?
Dr. Yau is linked to Pacific Internal Medicine Associates.
Does Dr. May Yen Yau accept Medicare?
Yes. CMS data shows Dr. Yau billed Medicare for 1,181 services in 2024, and Dr. Yau accepts Medicare assignment.
Does Dr. May Yen Yau offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Yau as offering telehealth services.
What is Dr. May Yen Yau's MIPS score?
Dr. Yau's MIPS final score for performance year 2024 is 89 out of 100, reported individually.
Show 9 more questionsShow fewer questions
How many Medicare patients does Dr. May Yen Yau see?
CMS counts 213 Medicare patients who saw Dr. Yau in 2024, with an average age of 75.
Is Dr. May Yen Yau board certified?
Yes. Dr. Yau is board certified in internal medicine by the American Board of Internal Medicine.
What services does Dr. May Yen Yau bill to Medicare?
In 2024, Dr. Yau's most billed Medicare services were office visit, established patient (99214), medicare service (G0439) and medicare service (G0444).
Where did Dr. May Yen Yau go to medical school?
Dr. Yau graduated from Feinberg School of Medicine in 1989.
What drugs does Dr. May Yen Yau prescribe most?
In 2024 Medicare Part D data, Dr. Yau's most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Losartan Potassium.
Has Dr. May Yen Yau received payments from drug or device companies?
CMS Open Payments shows $62 in general payments to Dr. Yau from 3 companies from 2016 to 2025. The largest total came from Teva Pharmaceuticals USA, Inc.
How long has Dr. May Yen Yau been practicing?
Dr. Yau graduated from medical school in 1989, 37 years ago.
Does Dr. May Yen Yau do research?
Dr. Yau has worked on 2 clinical trials.
What insurance does Dr. May Yen Yau accept?
Dr. Yau is in network with 13 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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