Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Gregory Fredrick Hertwig

Anesthesiology Physician in Spartanburg, SC · enumerated 2015.

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

National Provider Identifier

1013303627

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Registry record

Entity type Individual (Type 1)

Name Gregory Fredrick Hertwig

Sex Male

Practice address 101 E Wood St, Spartanburg, SC, 29303

Phone (864) 560-6122

Fax (864) 560-6276

Enumeration date Apr 9, 2015

Last updated in NPPES Jul 24, 2020

Taxonomy & licenses

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License 83883 (SC) Primary

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.

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Frequently asked questions

Where does Gregory Hertwig practice?

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

What is the NPI number for Gregory Hertwig?

The National Provider Identifier (NPI) for Gregory Hertwig is 1013303627, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-07-24.