J Allergy Clin Immunol
Anti-Inflammatory Agents, Non-SteroidalAspirinAsthma
Dr. Roxanne S. Leung, MD
NPI1730235334PAC ID2769556265
- Medicare services, 2024
- 3,530
- Medicare patients, 2024
- 137
- Part D claims, 2024
- 526
- Publications
- 1
- MIPS score, 2024
- 82
- Practice address
- 4050 Moorpark Ave, San Jose, CA 95117
- Practice phone
- Call (408) 243-2700
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Allergy And Asthma Associates Of Northern California A Medical Corp
Medical specialty practice · San Jose, California
Find Dr. Leung's professional email, personal email and mobile number
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Dr. Roxanne S. Leung is an allergy physician in San Jose, California
Dr. Leung practices at Allergy And Asthma Associates Of Northern California A Medical Corp in San Jose, California.
Dr. Leung's NPI, 1730235334, was assigned on January 26, 2007. Dr. Leung graduated from Rush Medical College in 2003. Dr. Leung holds California license A103378.
NPI and contact details
- NPI
- 1730235334NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2769556265
- NPI enumeration date
- January 26, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (408) 243-2700
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 49
- Medical school graduation
- 2003
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Roxanne S. Leung practices at Allergy and Asthma Associates of Northern California A Medical Corp in San Jose, California
Dr. Leung's primary practice is Allergy and Asthma Associates of Northern California A Medical Corp, at 4050 Moorpark Ave, San Jose, CA 95117. The practice phone is (408) 243-2700.
- Allergy and Asthma Associates of Northern California A Medical Corp4050 Moorpark Ave, San Jose, CA 95117Phone(408) 243-2700
Source: Dmand AI Affiliation Data
Dr. Roxanne S. Leung is affiliated with 2 sites of care and 2 medical groups
Dr. Leung's primary practice is Allergy And Asthma Associates Of Northern California A Medical Corp in San Jose, California. The medical group on file is BayChildren's Medical Group. Dmand AI also links Dr. Leung to 1 more group practice or clinic and 1 medical group, each named with a free account.
Allergy And Asthma Associates Of Northern California A Medical CorpPrimary
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Roxanne S. Leung's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Leung practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Allergy And Asthma Associates Of Northern California A Medical Corp | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Roxanne S. Leung is one of 136 allergy physicians in California
Allergy is Dr. Leung's primary specialty in the NPI Registry, under taxonomy code 207KA0200X. Dr. Leung is board certified in allergy & immunology by the American Board of Allergy and Immunology. Dmand AI has Dr. Leung's licenses on file in 2 states: California and Colorado.
Specialties and state licenses
- Allergy, CaliforniaPrimary
- Colorado license
Clinical focus
Dmand AI lists asthma, chronic nasal allergies, chronic sinusitis and hives among the conditions Dr. Leung treats.
Allergy physicians near Dr. Leung
Counts of allergy physicians with a Dmand AI profile, by place and practice. Each opens the list.
136allergy physicians in California
2allergy physicians in San Jose
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Roxanne S. Leung billed Medicare for 3,530 services in 2024
CMS data shows 3,530 Medicare services from Dr. Leung across 9 procedure codes in 2024, for 137 Medicare patients. Medicare paid $57,155 for them. Every service was in an office.
Medicare services, 20243,530
Medicare patients137
Paid by Medicare$57,155
Procedure codes9
Dr. Leung's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 3,5172024: 3,2797%
- Office and hospital visits
- 2023: 2582024: 2513%
Dr. Leung compared with the California median for allergy physicians, 2024
- Dr. Leung
- California median
- Medicare services
- 3,530vs 2,33451% above
- Medicare patients
- 137vs 16818% below
- Part D claims
- 378vs 21576% above
Medians across 123 allergy physicians in California with Dmand AI profiles that report each measure.
Dr. Leung'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. Leung?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Leung and other allergy physicians in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Roxanne S. Leung treated 137 Medicare patients in 2024, average age 74
CMS counts 137 Medicare patients who saw Dr. Leung in 2024. The largest group is 65 to 74, with 71 patients. 75% of them have high cholesterol, and 64% have high blood pressure. Their average risk score is 0.87, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Leung's median patient age at 42, with 59% women.
Medicare patients, 2024137
Average age74
Average risk score0.87
Dr. Leung's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Leung's Medicare patients by sex, 2024
- Women10274%
- Men3526%
Chronic conditions among Dr. Leung's Medicare patients, 2024
- High cholesterol75%
- High blood pressure64%
- Asthma55%
- Arthritis47%
- Ischemic heart disease25%
- Osteoporosis25%
- Diabetes21%
- Mood disorders19%
Share of Medicare patients with each condition. A patient can have several.
Dr. Leung's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 42
Patient panel by sex, all payers
- Women59%
- Men41%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Roxanne S. Leung wrote 526 Medicare Part D claims in 2024
In 2024, Dr. Leung wrote 526 Medicare Part D claims for 110 patients. 65% of them were for generic drugs. CMS names the drug for 378 of them, across 13 drugs with 11 or more claims each, at $128,781 in total drug cost. In 2023, CMS named 321 claims across 14 drugs.
Part D claims, 2024526
Drugs named by CMS13
Total drug cost$128,781
Part D patients110
Dr. Leung's Part D claims by kind of drug, 2024
- Generic340 claims65%
- Brand-name186 claims35%
Dr. Leung'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. Leung's Part D claims, 2024
- Antibiotics5%28 of 526 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: 3212024: 37818%
Drugs named by CMS: 13 in 2024, 14 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. Roxanne S. Leung scored 82 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 82 out of 100 for Dr. Leung for performance year 2024, reported as part of a group. Dr. Leung accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Leung as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Dr. Leung's MIPS scores, performance year 2024
- 82of 100Final score
- 89.1of 100Quality
- 71of 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. Roxanne S. Leung has 1 publication on record
Dmand AI links 1 paper to Dr. Leung in 2010. Dr. Leung's most frequent co-author is Theerapol Prasertsuntarasai, MD.
Papers1
Dr. Leung's most frequent co-authors
Recent publications by Dr. Leung
See who Dr. Leung researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Leung works with, so you can find a warm path to the right allergy physicians.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Roxanne S. Leung received $137 in industry payments from 2017 to 2018
CMS Open Payments shows 2 general payments to Dr. Leung from 2 drug and device companies from 2017 to 2018. Food and beverage make up the largest share, 100% of the total. Medtronic Vascular, Inc. paid the most, $120.
General payments to Dr. Leung by program year, 2017 to 2018
Companies that paid Dr. Leung the most, 2017 to 2018
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Roxanne S. Leung graduated from Rush Medical College
Dr. Leung graduated from Rush Medical College in 2003. Dr. Leung is a member of AAAAI.
- Medical school
- Board certified in allergy & immunology
Source: Dmand AI Professional Profile Data
Dr. Roxanne S. Leung accepts plans from 14 insurance carriers
Dr. Leung is in network with 14 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Elevance
- HCSC
- Blue Cross Blue Shield of Massachusetts
- Regence Health Plans
- Alliant Health Plans
- +6 more carriersWith a free account
Plan types Dr. Leung accepts, by number of carriers
- PPO9
- Medicare7
- HMO6
- EPO4
- POS4
Source: Dmand AI Insurance Network Data
Sources for Dr. Roxanne S. Leung'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) |
| 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 |
| 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. Roxanne S. Leung
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. Roxanne S. Leung's NPI number?
Dr. Roxanne S. Leung's NPI number is 1730235334. It was assigned on January 26, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Roxanne S. Leung?
Dr. Roxanne S. Leung is an allergy physician in San Jose, California. The primary specialty in the NPI Registry is Allergy Physician (taxonomy code 207KA0200X).
Where does Dr. Roxanne S. Leung practice?
Dr. Leung practices at 4050 Moorpark Ave, San Jose, CA 95117. Dr. Leung's primary practice is Allergy And Asthma Associates Of Northern California A Medical Corp in San Jose, California. Dmand AI also links Dr. Leung to 1 group practice or clinic and 1 medical group.
What is Dr. Roxanne S. Leung's office phone number?
The practice phone on file for Dr. Leung is (408) 243-2700.
What is Dr. Roxanne S. Leung's medical license number?
Dr. Leung holds California license A103378, one of the licenses on file in 2 states.
Which states has Dr. Roxanne S. Leung been licensed in?
Dmand AI has state licenses on file for Dr. Leung in California (2008 to 2027) and Colorado (2006 to 2009).
What medical group is Dr. Roxanne S. Leung part of?
Dr. Leung is linked to BayChildren's Medical Group. Dmand AI links Dr. Leung to 1 more medical group.
Does Dr. Roxanne S. Leung accept Medicare?
Yes. CMS data shows Dr. Leung billed Medicare for 3,530 services in 2024, and Dr. Leung accepts Medicare assignment.
Does Dr. Roxanne S. Leung offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Leung as offering telehealth services.
What is Dr. Roxanne S. Leung's MIPS score?
Dr. Leung's MIPS final score for performance year 2024 is 82 out of 100, reported as part of a group.
Show 10 more questionsShow fewer questions
How many Medicare patients does Dr. Roxanne S. Leung see?
CMS counts 137 Medicare patients who saw Dr. Leung in 2024, with an average age of 74.
Is Dr. Roxanne S. Leung board certified?
Yes. Dr. Leung is board certified in allergy & immunology by the American Board of Allergy and Immunology.
What services does Dr. Roxanne S. Leung bill to Medicare?
In 2024, Dr. Leung's most billed Medicare services were allergy test or treatment (95004), allergy test or treatment (95165) and allergy test or treatment (95117).
Where did Dr. Roxanne S. Leung go to medical school?
Dr. Leung graduated from Rush Medical College in 2003.
What drugs does Dr. Roxanne S. Leung prescribe most?
In 2024 Medicare Part D data, Dr. Leung's most prescribed drugs by claims were Montelukast Sodium, Hydroxyzine HCl and Prednisone.
Has Dr. Roxanne S. Leung received payments from drug or device companies?
CMS Open Payments shows $137 in general payments to Dr. Leung from 2 companies from 2017 to 2018. The largest total came from Medtronic Vascular, Inc.
How long has Dr. Roxanne S. Leung been practicing?
Dr. Leung graduated from medical school in 2003, 23 years ago.
Does Dr. Roxanne S. Leung do research?
Dmand AI links 1 publication to Dr. Leung.
Who does Dr. Roxanne S. Leung publish with?
Dr. Leung's most frequent co-authors are Theerapol Prasertsuntarasai, MD (1 shared paper).
What insurance does Dr. Roxanne S. Leung accept?
Dr. Leung is in network with 14 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.
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