DR. ROXANNE LEUNG MD
NPI 1730235334
Allergy & Immunology - Allergy in San Jose, CA

Q: What is Roxanne Leung's NPI number?

The NPI number for Roxanne Leung is 1730235334. It was assigned to this individual provider in the NPPES registry on January 26, 2007.

Q: What is Roxanne Leung's specialty?

The primary specialty registered for this NPI is Allergy & Immunology, specializing in Allergy, with taxonomy code 207KA0200X.

Q: When was this NPI record last updated?

The NPPES record for Roxanne Leung was last updated on December 12, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since January 26, 2007PECOS EnrolledAccepts Medicare Assignment

4050 MOORPARK AVE, SAN JOSE, CA 95117(408) 243-2700 Get Directions Write a Review

NPPES record last updated: December 12, 2013. Verified against the NPPES registry weekly; last sync: October 18, 2026.

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About Dr. Roxanne Leung Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. ROXANNE LEUNG MD (NPI 1730235334) is an individual allergy provider in San Jose, California, licensed in California (A103378) and active in the NPI registry since January 2007. She is enrolled in Medicare PECOS and is a graduate of Rush Medical College Of Rush University (2003).

NPPES Registry Identity

NPI1730235334

Entity TypeIndividualFemale

Primary Taxonomy207KA0200X

Provider Legal NameDR. ROXANNE LEUNGCredential: MD

Location Address4050 MOORPARK AVESan Jose, CA 95117-1840

Mailing Address4050 Moorpark AveSan Jose, CA 95117-1840 · (408) 243-2700

Phone(408) 243-2700

Sole ProprietorNo

Medical School CMSRush Medical College Of Rush UniversityGraduated 2003

Enumeration DateJanuary 26, 2007

Last NPPES UpdateDecember 12, 2013

✔ NPI 1730235334 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAllergy & Immunology · AllergyAllopathic & Osteopathic Physicians

Taxonomy Code207KA0200X

License✔ Licensed in CA · A103378

Definition

A physician who specializes in the diagnosis, treatment, and management of allergies. Source: National Uniform Claim Committee

4050 MOORPARK AVE, San Jose, CA 95117

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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Roxanne Leung Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID2769556265

PECOS Enrollment IDI20080731000808

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show Roxanne Leung reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Allergy & Asthma Associates Of Santa Clara Valley A Medical Corp

Same address

Allergy & Immunology

4050 MOORPARK AVE
San Jose, CA 95117

Reassigned Medicare billing, California enrollment
7 clinicians in this Medicare group

NPI 1962531590 (408) 243-2700

Ucsf Health Medical Foundation

41 mi

Pediatrics

6425 CHRISTIE AVE STE 220
Emeryville, CA 94608

Reassigned Medicare billing, California enrollment
79 clinicians in this Medicare group

NPI 1043628316 (415) 476-7220

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 9

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Test for allergy using allergenic extract 95004

An allergy test with allergenic extract is a diagnostic method to identify substances causing allergic reactions. Small amounts of common allergens are introduced to your body, usually through skin pricks or blood tests. Your body's response helps determine your allergies.

1,711 services26 patients

Professional service for preparation and provision of 1 or more antigens 95165

This service involves the creation and supply of antigens, substances that stimulate your immune system to fight diseases. These antigens can be used in vaccines or allergy tests to help your body build defenses against specific health threats.

625 services32 patients

Professional service for multiple injections of allergen 95117

The professional service for multiple injections of allergens involves administering small doses of specific allergens into your body. This is done to help your immune system become less sensitive to them, reducing your allergic reaction over time. It's a safe, effective way to manage allergies.

598 services33 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

176 services85 patients

Test to measure expiratory airflow and volume 94010

This test, known as spirometry, assesses how well your lungs work. It measures how much air you can inhale, how much you can exhale and how quickly you can exhale. It's non-invasive and helps diagnose conditions like asthma or COPD.

148 services76 patients

Test to measure the level of nitric oxide gas 95012

A test to measure the level of nitric oxide gas helps assess inflammation in the lungs, often linked with asthma. You'll breathe into a device, and it'll provide a reading of nitric oxide levels. This helps monitor and manage respiratory conditions.

139 services72 patients

Other Providers at the Same Location NPPES 4

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

ALAN B GOLDSOBEL MD

Allergy & Immunology

4050 MOORPARK AVE
SAN JOSE, CA 95117

Santa Clara County (408) 243-2700

JAMES D WOLFE MD

Allergy & Immunology

4050 MOORPARK AVE
SAN JOSE, CA 95117

Santa Clara County (408) 243-2700

RICHIKA MAKOL MD

Allergy & Immunology (Allergy)

4050 MOORPARK AVE
SAN JOSE, CA 95117

Santa Clara County (408) 243-2700

ALLERGY & ASTHMA ASSOCIATES OF SANTA CLARA VALLEY A MEDICAL CORP

Allergy & Immunology

4050 MOORPARK AVE
SAN JOSE, CA 95117

Santa Clara County (408) 243-2700

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Roxanne Leung's NPI number?

The NPI number for Roxanne Leung is 1730235334. It was assigned to this individual provider in the NPPES registry on January 26, 2007.

Where is Roxanne Leung located?

Roxanne Leung practices at 4050 Moorpark Ave, San Jose, CA 95117. The listed phone number is (408) 243-2700.

What is Roxanne Leung's specialty?

The primary specialty registered for this NPI is Allergy & Immunology, specializing in Allergy, with taxonomy code 207KA0200X.

Is Roxanne Leung enrolled in Medicare?

Yes. Roxanne Leung is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Roxanne Leung's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Roxanne Leung reassigns Medicare benefits to 2 organizations: Allergy & Asthma Associates Of Santa Clara Valley A Medical Corp (San Jose, CA) and Ucsf Health Medical Foundation (Emeryville, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Roxanne Leung's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Roxanne Leung was last updated on December 12, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.