Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Michael Louis Ernst, MD

Pediatric Urology Physician in Stony Brook, NY · enumerated 2015.

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

National Provider Identifier

1386039378

Verified

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Registry record

Entity type Individual (Type 1)

Name Michael Louis Ernst

Credential MD

Sex Male

Practice address 101 Nicholls Rd, Hsc-9 040, Stony Brook, NY, 11795

Phone (631) 444-1176

Enumeration date Apr 6, 2015

Last updated in NPPES Aug 7, 2026

Taxonomy & licenses

208800000X Urology Physician Allopathic & Osteopathic Physicians · License 30.138575 (OH) Secondary

208800000X Urology Physician Allopathic & Osteopathic Physicians · License 316666 (NY) Secondary

2088P0231X Pediatric Urology Physician Allopathic & Osteopathic Physicians · License 35.138575 (OH) Secondary

2088P0231X Pediatric Urology Physician Allopathic & Osteopathic Physicians · License 316666 (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 Michael Ernst?

The National Provider Identifier (NPI) for Michael Ernst is 1386039378, a Type 1 (individual) record in the CMS NPPES registry.

Where does Michael Ernst practice?

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

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