NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ashleigh A Olson, M.D.

Allergy & Immunology Physician in Madison, WI · enumerated 2011.

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

National Provider Identifier

1699064238

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Ashleigh A Olson
Credential M.D.
Sex Female
Practice address 1821 S Stoughton Rd, Madison, WI, 53716
Phone (608) 260-6000
Fax (608) 260-6429
Enumeration date Apr 5, 2011
Last updated in NPPES Oct 27, 2020

Taxonomy & licenses

207K00000X Allergy & Immunology Physician Allopathic & Osteopathic Physicians · License 62292-20 (WI) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier Type State Issuer
1699064238 Medicaid WI -

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

How do I verify Ashleigh Olson's NPI record?
Cross-check NPI 1699064238 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1699064238 active?
Yes, as of the latest NPPES snapshot, NPI 1699064238 is active (record last updated 2020-10-27).

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-10-27.