Katharine Sue Nelson, MD
Allergy & Immunology Physician · San Jose, CA
Katharine Sue Nelson, MD is an allergy & immunology physician with a practice address in San Jose, California, and NPI 1497921811, issued on May 6, 2008. Check the license (California A108809, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Katharine Sue Nelson
- Credential
- MD
- Primary taxonomy
- Allergy & Immunology Physician 207K00000X
- License number
- A108809 CA
Self-reported in NPPES; status is on the state search - Practice location
- 130 Bellerose Dr, San Jose, CA 95128
- Phone
- (408) 286-1707
- Enumerated
- May 6, 2008
- Record last updated
- Jun 19, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (408) 286-1744
- Medicare enrollment
- Enrolled (PECOS I20120206000257); accepts Medicare assignment
- Medical or professional school
- University Of Wisconsin School Of Medicine, 2005
- Entity
- Type 1 · individual
Also registered at 130 Bellerose Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Theodore Chu, M.D.Allergy Physician1194765123
- John Kellogg, M.D., M.S.Allergy Physician1932149697
- Anlin Xu, M.D.Allergy Physician1285681007
Verify Katharine Sue Nelson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A108809Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
65% fewer Medicare Part D claims than the average allergy & immunology physician in 2024
260 Medicare Part D claims for 57 beneficiaries, against an average of 741 among the 2,899 providers of this specialty who prescribed in Part D. Brand-name drugs were 36% of claims.
Most prescribed
- Ipratropium Bromide42 claims
- Montelukast Sodium41 claims
- Albuterol Sulfate Hfa20 claims
- Wixela Inhub20 claims
- Azelastine Hcl18 claims
- Gamunex-C18 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $2,170.70
67 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 2,496 providers of this specialty with any payment received $8,321.81 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- South Bay Allergy And Asthma Group IncSan Jose, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Allergy & Immunology Physician providers in California
There are 444 allergy & immunology physician records in California.
Other allergy & immunology physician records in California
- Edsel Abud, MD, PHDLa Jolla, CA1891257192
- Seema Aceves, M.D., PH.D.San Diego, CA1366511628
- Terrie Ahn, MDSanta Monica, CA1093166795
- Rhonda Alkatib, M.D.San Diego, CA1417363086
- Mercedes Amado, M.D.San Diego, CA1477510287
- Loula Amin, M.D.Newport Beach, CA1043452782
- A Aminian, M.D.Fresno, CA1508080193
- Ali Amirzadeh, M.D.Sacramento, CA1083748685
- Lorraine Anderson, MDSanta Monica, CA1013209568
- Joshua Ang, DOPasadena, CA1699398016
Common questions
What is Katharine Sue Nelson, MD's NPI number?
Katharine Sue Nelson, MD's National Provider Identifier (NPI) is 1497921811, issued on May 6, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Katharine Sue Nelson, MD located?
The NPPES record lists a practice address at 130 Bellerose Dr, San Jose, CA, 95128. Phone: (408) 286-1707. Providers update this record themselves, so call before visiting.
How can I verify Katharine Sue Nelson, MD's license?
NPPES lists California license number A108809, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Katharine Sue Nelson, MD prescribe under Medicare Part D?
In 2024, Katharine Sue Nelson, MD had 260 Medicare Part D claims for 57 beneficiaries; the average among allergy & immunology physician prescribers was 741. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.