Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Alexander Leigh Nourse, D.O., M.B.A., M.S.

Internal Medicine Physician in Nashville, TN · enumerated 2017.

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

National Provider Identifier

1609300136

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Registry record

Entity type Individual (Type 1)

Name Dr. Alexander Leigh Nourse

Credential D.O., M.B.A., M.S.

Sex Male

Practice address 3601 the Vanderbilt Clinic, Nashville, TN, 37232

Phone (615) 936-2000

Enumeration date Apr 11, 2017

Last updated in NPPES Aug 31, 2023

Taxonomy & licenses

208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License 3831 (TN) Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 3831 (TN) Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO 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 Alexander Nourse's NPI record?

Cross-check NPI 1609300136 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1609300136 active?

Yes, as of the latest NPPES snapshot, NPI 1609300136 is active (record last updated 2023-08-31).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-08-31.