Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Lindsey Semprini, M.D.

Internal Medicine Physician in Riverhead, NY · enumerated 2016.

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

National Provider Identifier

1639529696

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Registry record

Entity type Individual (Type 1)

Name Dr. Lindsey Semprini

Credential M.D.

Sex Female

Practice address 1300 Roanoke Ave, Riverhead, NY, 11901

Phone (631) 548-6176

Fax (631) 548-6414

Enumeration date Jun 20, 2016

Last updated in NPPES Oct 2, 2020

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License MT212106 (PA) Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 304065-01 (NY) 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

What is the NPI number for Lindsey Semprini?

The National Provider Identifier (NPI) for Lindsey Semprini is 1639529696, a Type 1 (individual) record in the CMS NPPES registry.

Where does Lindsey Semprini practice?

The practice location on file with NPPES is in Riverhead, NY. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-10-02.