Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Helen Sanderson, MD

Allergy Physician in Madison, WI · enumerated 2018.

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

National Provider Identifier

1699274670

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Registry record

Entity type Individual (Type 1)

Name Helen Sanderson

Credential MD

Sex Female

Practice address 20 S Park St Ste 460, Madison, WI, 53715

Phone (608) 287-2600

Enumeration date Feb 6, 2018

Last updated in NPPES Dec 10, 2024

Taxonomy & licenses

207KA0200X Allergy Physician Allopathic & Osteopathic Physicians · License 83564 (WI) 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

How do I verify Helen Sanderson's NPI record?

Cross-check NPI 1699274670 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1699274670 active?

Yes, as of the latest NPPES snapshot, NPI 1699274670 is active (record last updated 2024-12-10).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-12-10.