NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Daniel Simpson, M.D.

Radiation Oncology Physician in La Jolla, CA · enumerated 2010.

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

National Provider Identifier

1689974883

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Daniel Simpson
Credential M.D.
Sex Male
Practice address 3855 Health Sciences Dr, #0865, La Jolla, CA, 92093
Phone (858) 822-6040
Fax (858) 822-6078
Enumeration date Oct 22, 2010
Last updated in NPPES Feb 23, 2015

Taxonomy & licenses

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians · License A118377 (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.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1689974883 active?
Yes — as of the latest NPPES snapshot, NPI 1689974883 is active (record last updated 2015-02-23).
How do I verify Daniel Simpson's NPI record?
Cross-check NPI 1689974883 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-02-23.