Dr. Wayne Chih Wing Leong, MD
- Medicare services, 2024
- 83
- Medicare patients, 2024
- 37
- Part D claims, 2024
- 129
- Hospital affiliations
- 1
- Industry payments
- $267
- Practice address
- 380 West MacArthur Boulevard, Oakland, CA 94609
- Practice phone
- Call (510) 251-0121
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Addiction Medicine & Recovery Services at Oakland Medical Center
Outpatient Addiction Treatment · Oakland, California
Find Dr. Leong'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. Wayne Chih Wing Leong is a hospitalist in Oakland, California
Dr. Leong practices at Addiction Medicine & Recovery Services at Oakland Medical Center in Oakland, California.
Dr. Leong's NPI, 1023196102, was assigned on November 2, 2006. Dr. Leong graduated from UC San Diego School of Medicine in 1992. Dr. Leong's California license number on file is G78793.
- NPI
- 1023196102NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2264616234
- NPI enumeration date
- November 2, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (510) 251-0121
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 60
- Medical school graduation
- 1992
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Wayne Chih Wing Leong practices at Addiction Medicine & Recovery Services at Oakland Medical Center in Oakland, California
Dr. Leong's primary practice is Addiction Medicine & Recovery Services at Oakland Medical Center, at 380 West MacArthur Boulevard, Oakland, CA 94609. The practice phone is (510) 251-0121.
- Addiction Medicine & Recovery Services at Oakland Medical Center380 West MacArthur Boulevard, Oakland, CA 94609Phone(510) 251-0121
Source: Dmand AI Affiliation Data
Dr. Wayne Chih Wing Leong is affiliated with 2 sites of care and 1 medical group
Dr. Leong's primary practice is Addiction Medicine & Recovery Services at Oakland Medical Center in Oakland, California. Dr. Leong is also affiliated with Oakland Medical Center. The medical group on file is The Permanente Medical Group, Inc.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Wayne Chih Wing Leong's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Leong practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Addiction Medicine & Recovery Services at Oakland Medical Center | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Wayne Chih Wing Leong is one of 3,186 hospitalists in California
Hospitalist is Dr. Leong's primary specialty in the NPI Registry, under taxonomy code 208M00000X. Dr. Leong is board certified in internal medicine by the American Board of Internal Medicine. Dr. Leong has a license on file in California.
Specialties and state licenses
- Hospitalist, CaliforniaPrimary
Clinical focus
Dmand AI lists sepsis among the conditions Dr. Leong treats.
Hospitalists near Dr. Leong
Counts of hospitalists 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. Wayne Chih Wing Leong billed Medicare for 83 services in 2024
CMS data shows 83 Medicare services from Dr. Leong across 2 procedure codes in 2024, for 37 Medicare patients. Medicare paid $5,678 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Leong's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 512024: 8363%
Dr. Leong compared with the California median for hospitalists, 2024
- Dr. Leong
- California median
- Medicare services
- 83vs 43081% below
- Medicare patients
- 37vs 20182% below
- Part D claims
- 14vs 6980% below
Medians across 2,991 hospitalists in California with Dmand AI profiles that report each measure.
Dr. Leong'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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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Leong and other hospitalists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Wayne Chih Wing Leong treated 37 Medicare patients in 2024, average age 75
CMS counts 37 Medicare patients who saw Dr. Leong in 2024. The largest group is 75 to 84, with 15 patients. 75% of them have high blood pressure, and 73% have high cholesterol. Their average risk score is 3.48, 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. Leong's median patient age at 70, with 57% women.
Dr. Leong's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Leong's Medicare patients by sex, 2024
- Women2054%
- Men1746%
Chronic conditions among Dr. Leong's Medicare patients, 2024
- High blood pressure75%
- High cholesterol73%
- Heart failure65%
- Chronic kidney disease57%
- Alzheimer's and dementia49%
- Arthritis49%
- Diabetes46%
- Ischemic heart disease46%
Share of Medicare patients with each condition. A patient can have several.
Dr. Leong'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
- Women57%
- Men42%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Wayne Chih Wing Leong wrote 129 Medicare Part D claims in 2024
In 2024, Dr. Leong wrote 129 Medicare Part D claims for 52 patients. 79% of them were for generic drugs. CMS names the drug for 14 of them, across 1 drug with 11 or more claims each, at $107 in total drug cost. In 2023, CMS named 44 claims across 2 drugs.
Dr. Leong's Part D claims by kind of drug, 2024
- Generic102 claims79%
- Brand-name and other27 claims21%
Dr. Leong'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. Leong's Part D claims, 2024
- Antibiotics10%13 of 129 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: 442024: 1468%
Drugs named by CMS: 1 in 2024, 2 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. Wayne Chih Wing Leong takes part in Medicare
Dr. Leong 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. Wayne Chih Wing Leong received $267 in industry payments from 2024 to 2025
CMS Open Payments shows 3 general payments to Dr. Leong from 2 drug and device companies from 2024 to 2025. Food and beverage make up the largest share, 100% of the total. Radius Health, Inc. paid the most, $201.
General payments to Dr. Leong by program year, 2024 to 2025
Companies that paid Dr. Leong the most, 2024 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Wayne Chih Wing Leong graduated from UC San Diego School of Medicine
Dr. Leong graduated from UC San Diego School of Medicine in 1992.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Wayne Chih Wing Leong accepts plans from 2 insurance carriers
Dr. Leong is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Kaiser Permanente
- CMS Medicare
Plan types Dr. Leong accepts, by number of carriers
- EPO1
- HMO1
- Medicare1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Wayne Chih Wing Leong'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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. Wayne Chih Wing Leong
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. Wayne Chih Wing Leong's NPI number?
Dr. Wayne Chih Wing Leong's NPI number is 1023196102. It was assigned on November 2, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Wayne Chih Wing Leong?
Dr. Wayne Chih Wing Leong is a hospitalist in Oakland, California. The primary specialty in the NPI Registry is Hospitalist Physician (taxonomy code 208M00000X).
Where does Dr. Wayne Chih Wing Leong practice?
Dr. Leong practices at 380 West MacArthur Boulevard, Oakland, CA 94609. Dr. Leong's primary practice is Addiction Medicine & Recovery Services at Oakland Medical Center in Oakland, California.
What is Dr. Wayne Chih Wing Leong's office phone number?
The practice phone on file for Dr. Leong is (510) 251-0121.
What is Dr. Wayne Chih Wing Leong's medical license number?
Dr. Leong's California license number on file is G78793.
Which hospitals is Dr. Wayne Chih Wing Leong affiliated with?
Dr. Leong is affiliated with Oakland Medical Center.
What medical group is Dr. Wayne Chih Wing Leong part of?
Dr. Leong is linked to The Permanente Medical Group, Inc.
Does Dr. Wayne Chih Wing Leong accept Medicare?
Yes. CMS data shows Dr. Leong billed Medicare for 83 services in 2024, and Dr. Leong accepts Medicare assignment.
How many Medicare patients does Dr. Wayne Chih Wing Leong see?
CMS counts 37 Medicare patients who saw Dr. Leong in 2024, with an average age of 75.
Is Dr. Wayne Chih Wing Leong board certified?
Yes. Dr. Leong is board certified in internal medicine by the American Board of Internal Medicine.
Show 6 more questionsShow fewer questions
What services does Dr. Wayne Chih Wing Leong bill to Medicare?
In 2024, Dr. Leong's most billed Medicare services were hospital inpatient care (99232) and hospital inpatient care (99238).
Where did Dr. Wayne Chih Wing Leong go to medical school?
Dr. Leong graduated from UC San Diego School of Medicine in 1992.
What drugs does Dr. Wayne Chih Wing Leong prescribe most?
In 2024 Medicare Part D data, Dr. Leong's most prescribed drugs by claims were Furosemide.
Has Dr. Wayne Chih Wing Leong received payments from drug or device companies?
CMS Open Payments shows $267 in general payments to Dr. Leong from 2 companies from 2024 to 2025. The largest total came from Radius Health, Inc.
How long has Dr. Wayne Chih Wing Leong been practicing?
Dr. Leong graduated from medical school in 1992, 34 years ago.
What insurance does Dr. Wayne Chih Wing Leong accept?
Dr. Leong is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
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