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NORTH BAY ALLERGY AND ASTHMA ASSOCIATES INC.
NPI 1184731184
Allergy & Immunology in Napa, CA

Active since August 24, 2006
1100 PEAR TREE LANE, NAPA, CA 94558(707) 258-8100(707) 258-0734 Get Directions Write a Review

NPPES record last updated: April 5, 2021. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Apr 5, 2021, Feb 23, 2021, Feb 27, 2020 (3 updates tracked since 2020).

About North Bay Allergy And Asthma Associates Inc. NPPES

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

NORTH BAY ALLERGY AND ASTHMA ASSOCIATES INC. (NPI 1184731184) is a healthcare organization registered as an allergy & immunology in Napa, California and active in the NPI registry since August 2006. The organization maintains a secondary practice location in Sonoma and lists Sam S Ahn, Owner, as its authorized official.

NPPES Registry Identity

NPI1184731184
Entity TypeOrganization
Primary Taxonomy207K00000X
Legal Business NameNORTH BAY ALLERGY AND ASTHMA
Location Address1100 PEAR TREE LANENapa, CA 94558
Mailing Address1100 Pear Tree LnNapa, CA 94558-6446 · (707) 258-8100 · Fax (707) 258-0734
Phone(707) 258-8100
Fax(707) 258-0734
Organization SubpartNo
Authorized OfficialSam S AhnOwner · (707) 258-8100
Enumeration DateAugust 24, 2006
Last NPPES UpdateApril 5, 20213 updates tracked since enumeration
NPPES CertifiedApril 5, 2021
✔ NPI 1184731184 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAllergy & ImmunologyAllopathic & Osteopathic Physicians
Taxonomy Code207K00000X
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.
1100 PEAR TREE LANE, Napa, CA 94558
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Other Names 1

Doing Business AsNorth Bay Allergy And Asthma Associates Inc.

Secondary Practice Location 1

Location 1414 W Napa StSonoma, CA 95476-6519 · Phone (707) 996-0212 · Fax (707) 258-0734

Other Identifiers 5

OtherZZZ51159YCA · Blueshield
MedicaidGR0092660CA
OtherZZZ06909ZCA · Medicare (ptan)
OtherZZZ51160YCA · Blue Shield
OtherZZZ07211ZCA · Medicare (ptan)

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

North Bay Allergy And Asthma Associates Inc. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

3

Medicare enrollment records show 3 clinicians reassign Medicare billing to North Bay Allergy And Asthma Associates Inc., which bills Medicare for the services they deliver. Of these, 3 practice at this address. They are listed nearest first.

Clinicians, nearest first (3)

Sam Ahn, M.D.
Allergy/Immunology
NPI 1558423814
1100 PEAR TREE LN
Napa, CA 94558
(707) 258-8100
✔ PECOS✔ Accepts MedicareSame address
Amber Keenan, FNP
Nurse Practitioner
NPI 1972022465
1100 PEAR TREE LN
Napa, CA 94558
(707) 258-8100
✔ PECOS✔ Accepts MedicareSame address
Kathleen Tajiri, MD
Allergy/Immunology
NPI 1689624983
1100 PEAR TREE LN
Napa, CA 94558
(707) 258-8100
✔ PECOS✔ Accepts MedicareSame address

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

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 North Bay Allergy And Asthma's NPI number?

The NPI number for North Bay Allergy And Asthma is 1184731184. It was assigned to this organization in the NPPES registry on August 24, 2006. The provider is doing business as North Bay Allergy And Asthma Associates Inc..

Where is North Bay Allergy And Asthma located?

North Bay Allergy And Asthma is located at 1100 Pear Tree Lane, Napa, CA 94558. The listed phone number is (707) 258-8100.

What is North Bay Allergy And Asthma's specialty?

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

Is North Bay Allergy And Asthma enrolled in Medicare?

Yes. North Bay Allergy And Asthma is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through North Bay Allergy And Asthma?

According to the CMS Revalidation Reassignment List (October 2026 release), 3 clinicians reassign their Medicare billing to North Bay Allergy And Asthma, in Allergy/Immunology and Nurse Practitioner. A 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 the clinician's services. Of these, 3 practice at this address. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for North Bay Allergy And Asthma was last updated on April 5, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.