1. Home
  2. Directory
  3. California
  4. San Jose
  5. Allergy Immunology
  6. NPI Profile

KATHARINE SUE NELSON MD
NPI 1497921811
Allergy & Immunology in San Jose, CA

Active since May 06, 2008PECOS EnrolledAccepts Medicare Assignment
130 BELLEROSE DR, SAN JOSE, CA 95128(408) 286-1707(408) 286-1744 Get Directions Write a Review

NPPES record last updated: June 19, 2012. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Katharine Sue Nelson Md NPPES

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

KATHARINE SUE NELSON MD (NPI 1497921811) is an individual allergy & immunology provider in San Jose, California, licensed in California (A108809) and active in the NPI registry since May 2008. She is enrolled in Medicare PECOS and is a graduate of University Of Wisconsin School Of Medicine (2005).

NPPES Registry Identity

NPI1497921811
Entity TypeIndividualFemale
Primary Taxonomy207K00000X
Provider Legal NameKATHARINE SUE NELSONCredential: MD
Location Address130 BELLEROSE DRSan Jose, CA 95128-1729
Mailing Address130 Bellerose DrSan Jose, CA 95128-1729 · (408) 286-1707 · Fax (408) 286-1744
Phone(408) 286-1707
Fax(408) 286-1744
Sole ProprietorNo
Medical School CMSUniversity Of Wisconsin School Of MedicineGraduated 2005
Enumeration DateMay 6, 2008
Last NPPES UpdateJune 19, 2012
✔ NPI 1497921811 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAllergy & ImmunologyAllopathic & Osteopathic Physicians
Taxonomy Code207K00000X
License✔ Licensed in CA · A108809
Definition
An allergist-immunologist is trained in evaluation, physical and laboratory diagnosis, and management of disorders involving the immune system. Selected examples of such conditions include asthma, anaphylaxis, rhinitis, eczema, and adverse reactions to drugs, foods, and insect stings as well as immune deficiency diseases (both acquired and congenital), defects in host defense, and problems related to autoimmune disease, organ transplantation, or malignancies of the immune system.
130 BELLEROSE DR, San Jose, CA 95128
Open in Google Maps ↗

Other Names 1

Former Name (1)Katharine Wachowski Md

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

Katharine Sue Nelson 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 ID446321343
PECOS Enrollment IDI20120206000257
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 Reassignment

Medicare enrollment records show Katharine Nelson reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

South Bay Allergy & Asthma Group Inc
0.7 mi
Allergy
2211 MOORPARK AV, SUITE 130
San Jose, CA 95128
  • Reassigned Medicare billing, California enrollment
  • 4 clinicians in this Medicare group
NPI 1649467556 (408) 286-1744

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.
1,634 services24 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.
1,277 services47 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.
744 services57 patients
Test for allergy using allergenic extract injected into skin 95024
An allergy skin test involves injecting a small amount of allergenic extract into your skin. This test helps determine if you're allergic to specific substances. If allergic, a small red bump appears at the test site. It's safe and quick.
109 services13 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.
86 services56 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.
46 services25 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.

DR. THEODORE J CHU M.D.
Allergy & Immunology (Allergy)
130 BELLEROSE DR
SAN JOSE, CA 95128
Santa Clara County (408) 816-8923
THEODORE J. CHU, MD, ALLERGY AND ASTHMA, INC.
Allergy & Immunology (Allergy)
130 BELLEROSE DR
SAN JOSE, CA 95128
Santa Clara County (408) 816-8923
ANLIN XU M.D.
Allergy & Immunology (Allergy)
130 BELLEROSE DR
SAN JOSE, CA 95128
Santa Clara County (408) 286-1707
JOHN S. KELLOGG M.D., M.S.
Allergy & Immunology (Allergy)
130 BELLEROSE DR
SAN JOSE, CA 95128
Santa Clara County (408) 286-1707

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 Katharine Nelson's NPI number?

The NPI number for Katharine Nelson is 1497921811. It was assigned to this individual provider in the NPPES registry on May 6, 2008. The provider is also known as Katharine Wachowski MD.

Where is Katharine Nelson located?

Katharine Nelson practices at 130 Bellerose Dr, San Jose, CA 95128. The listed phone number is (408) 286-1707.

What is Katharine Nelson's specialty?

The primary specialty registered for this NPI is Allergy & Immunology with taxonomy code 207K00000X.

Is Katharine Nelson enrolled in Medicare?

Yes. Katharine Nelson 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 organization bills Medicare for Katharine Nelson's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Katharine Nelson reassigns Medicare benefits to South Bay Allergy & Asthma Group Inc (San Jose, CA). The 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 Katharine Nelson'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 Katharine Nelson was last updated on June 19, 2012. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.