Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Sandra Lin, M.D.

Otolaryngology Physician in Madison, WI · enumerated 2006.

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

National Provider Identifier

1720023781

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Registry record

Entity type Individual (Type 1)

Name Sandra Lin

Credential M.D.

Sex Female

Practice address 600 Highland Ave, Madison, WI, 53792

Phone (608) 263-6420

Enumeration date Jun 16, 2006

Last updated in NPPES Oct 17, 2023

Taxonomy & licenses

207Y00000X Otolaryngology Physician Allopathic & Osteopathic Physicians · License D59305 (MD) Secondary

207YX0007X Plastic Surgery within the Head & Neck (Otolaryngology) Physician Allopathic & Osteopathic Physicians · License 37449 (WI) Secondary

207Y00000X Otolaryngology Physician Allopathic & Osteopathic Physicians · License 37449 (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
400493100	Medicaid	MD	-

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 1720023781 active?

Yes, as of the latest NPPES snapshot, NPI 1720023781 is active (record last updated 2023-10-17).

How do I verify Sandra Lin's NPI record?

Cross-check NPI 1720023781 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 2023-10-17.