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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Adam Robert Horn, M.D.

Radiation Oncology Physician in San Diego, CA · enumerated 2012.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1982979019

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Registry record

Entity type Individual (Type 1)
Name Dr. Adam Robert Horn
Credential M.D.
Sex Male
Practice address 200 W Arbor Dr, San Diego, CA, 92103
Phone (800) 926-8273
Fax (888) 539-8781
Enumeration date Mar 22, 2012
Last updated in NPPES Dec 9, 2024

Taxonomy & licenses

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians · License 61499 (AZ) Secondary
2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians · License A126697 (CA) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

Is NPI 1982979019 active?
Yes, as of the latest NPPES snapshot, NPI 1982979019 is active (record last updated 2024-12-09).
How do I verify Adam Horn's NPI record?
Cross-check NPI 1982979019 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-12-09.