Dr. Hoi Ying Lau, DO
- Medicare services, 2024
- 786
- Medicare patients, 2024
- 295
- Part D claims, 2024
- 283
- Hospital affiliations
- 1
- Industry payments
- $26
- Practice address
- 2060 Fairmont Dr, Castro Valley, CA 94578
- Practice phone
- Call (510) 346-7500
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
John George Psychiatric Hospital
Castro Valley, California
Find Dr. Lau'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. Hoi Ying Lau is an internist in Castro Valley, California
Dr. Lau practices at John George Psychiatric Hospital in Castro Valley, California.
Dr. Lau's NPI, 1659675015, was assigned on December 28, 2010. Dr. Lau holds California license 20A10954.
- NPI
- 1659675015NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1153595244
- NPI enumeration date
- December 28, 2010
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (510) 346-7500
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 44
- Medical school graduation
- 2008
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Hoi Ying Lau practices at John George Psychiatric Hospital in Castro Valley, California
Dr. Lau's primary practice is John George Psychiatric Hospital, at 2060 Fairmont Dr, Castro Valley, CA 94578 in Alameda County. The practice phone is (510) 346-7500.
- John George Psychiatric Hospital2060 Fairmont Dr, Castro Valley, CA 94578 · Alameda CountyPhone(510) 346-7500
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Hoi Ying Lau is affiliated with 3 sites of care and 2 medical groups
Dr. Lau's primary practice is John George Psychiatric Hospital in Castro Valley, California. Dr. Lau is also affiliated with Alameda Health System - Highland Hospital. The medical group on file is Quantum Healthcare Medical Associates Inc. Dmand AI also links Dr. Lau to 1 more community health center and 1 medical group, each named with a free account.
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. Hoi Ying Lau's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Lau practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| John George Psychiatric Hospital | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Hoi Ying Lau is one of 16,751 internists in California
Internal medicine is Dr. Lau's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Lau is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Internists near Dr. Lau
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. Hoi Ying Lau billed Medicare for 786 services in 2024
CMS data shows 786 Medicare services from Dr. Lau across 9 procedure codes in 2024, for 295 Medicare patients. Medicare paid $67,765 for them.
Dr. Lau's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 8842024: 78611%
Where Dr. Lau's Medicare services took place, 2024
- In an office26634%
- In a facility52066%
Dr. Lau compared with the California median for internists, 2024
- Dr. Lau
- California median
- Medicare services
- 786vs 3612.2 times
- Medicare patients
- 295vs 15195% above
- Part D claims
- 57vs 42186% below
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Lau'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. Hoi Ying Lau treated 295 Medicare patients in 2024, average age 65
CMS counts 295 Medicare patients who saw Dr. Lau in 2024. The largest group is under 65, with 119 patients. 75% of them have high blood pressure, and 58% have high cholesterol. 92% are also on Medicaid. Their average risk score is 2.20, 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. Lau's median patient age at 48, with 38% women.
Dr. Lau's Medicare patients by age, 2024
Dr. Lau's Medicare patients by sex, 2024
- Women14649%
- Men14951%
Chronic conditions among Dr. Lau's Medicare patients, 2024
- High blood pressure75%
- High cholesterol58%
- Mood disorders53%
- Diabetes46%
- Schizophrenia and other psychoses46%
- Depression43%
- Anxiety40%
- Alcohol and drug use disorders37%
Share of Medicare patients with each condition. A patient can have several.
Dr. Lau's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 48
Patient panel by sex, all payers
- Women38%
- Men60%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Hoi Ying Lau wrote 283 Medicare Part D claims in 2024
In 2024, Dr. Lau wrote 283 Medicare Part D claims for 53 patients. 88% of them were for generic drugs. CMS names the drug for 57 of them, across 4 drugs with 11 or more claims each, at $451 in total drug cost. In 2023, CMS named 223 claims across 12 drugs.
Dr. Lau's Part D claims by kind of drug, 2024
- Generic249 claims88%
- Brand-name34 claims12%
Dr. Lau'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. Lau's Part D claims, 2024
- Opioids6%18 of 283 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: 2232024: 5774%
Drugs named by CMS: 4 in 2024, 12 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
How Dr. Hoi Ying Lau takes part in Medicare
Dr. Lau accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Hoi Ying Lau received $26 in industry payments in 2019
CMS Open Payments shows 1 general payment to Dr. Lau from 1 drug or device company in 2019. Food and beverage make up the largest share, 100% of the total. Chiesi USA, Inc. paid the most, $26.
Companies that paid Dr. Lau the most, 2019 to 2019
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Hoi Ying Lau'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 Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand 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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. Hoi Ying Lau
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. Hoi Ying Lau's NPI number?
Dr. Hoi Ying Lau's NPI number is 1659675015. It was assigned on December 28, 2010, and it is active in the NPI Registry.
What kind of doctor is Dr. Hoi Ying Lau?
Dr. Hoi Ying Lau is an internist in Castro Valley, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Hoi Ying Lau practice?
Dr. Lau practices at 2060 Fairmont Dr, Castro Valley, CA 94578. Dr. Lau's primary practice is John George Psychiatric Hospital in Castro Valley, California. Dmand AI also links Dr. Lau to 1 community health center and 1 medical group.
What is Dr. Hoi Ying Lau's office phone number?
The practice phone on file for Dr. Lau is (510) 346-7500.
What is Dr. Hoi Ying Lau's medical license number?
Dr. Lau holds California license 20A10954.
Which hospitals is Dr. Hoi Ying Lau affiliated with?
Dr. Lau is affiliated with Alameda Health System - Highland Hospital.
What medical group is Dr. Hoi Ying Lau part of?
Dr. Lau is linked to Quantum Healthcare Medical Associates Inc. Dmand AI links Dr. Lau to 1 more medical group.
Does Dr. Hoi Ying Lau accept Medicare?
Yes. CMS data shows Dr. Lau billed Medicare for 786 services in 2024, and Dr. Lau accepts Medicare assignment.
How many Medicare patients does Dr. Hoi Ying Lau see?
CMS counts 295 Medicare patients who saw Dr. Lau in 2024, with an average age of 65.
What services does Dr. Hoi Ying Lau bill to Medicare?
In 2024, Dr. Lau's most billed Medicare services were nursing facility care (99309), nursing facility care (99307) and hospital inpatient care (99233).
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What drugs does Dr. Hoi Ying Lau prescribe most?
In 2024 Medicare Part D data, Dr. Lau's most prescribed drugs by claims were Atorvastatin Calcium, Levothyroxine Sodium and Metformin HCl.
Has Dr. Hoi Ying Lau received payments from drug or device companies?
CMS Open Payments shows $26 in general payments to Dr. Lau from 1 company from 2019 to 2019. The largest total came from Chiesi USA, Inc.
How long has Dr. Hoi Ying Lau been practicing?
Dr. Lau graduated from medical school in 2008, 18 years ago.
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