Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. Sam S Ahn, MD

Individual provider Allergy & Immunology (Internal Medicine) Physician · NPI 1558423814

Dr. Sam S Ahn, MD is an Allergy/Immunology in Napa, California. Graduated from Harvard Medical School in 2003, 23 years ago. Practices with North Bay Allergy and Asthma, a 3-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in California.

Years since qualifying
23
Trained at
Harvard Medical School
Licensed in
CA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

1100 Pear Tree Ln
Napa, CA 94558-6446
Phone: (707) 258-8100
Fax: (707) 258-0734
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 414 W Napa St Ste B, Sonoma, CA 95476-6519 — (707) 258-8100

Specialties & licences

Allergy & Immunology (Internal Medicine) Physician (primary) Taxonomy 207RA0201X · Licence 147289 (CA)

Record details

NPI number1558423814
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedDecember 14, 2006
Last updated in NPPESMarch 7, 2023
Certification dateFebruary 5, 2020
Mailing address1100 Pear Tree Ln, Napa, CA 94558-6446

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyALLERGY/IMMUNOLOGY
Also practisesINTERNAL MEDICINE
Medical schoolHARVARD MEDICAL SCHOOL
Graduated 2003 (23 years in practice)
Group practice North Bay Allergy And Asthma — 3 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services