Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Calvert Glendon Warren, MD

Psychiatry Physician in Greenville, SC · enumerated 2006.

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

National Provider Identifier

1083727846

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Registry record

Entity type Individual (Type 1)

Name Calvert Glendon Warren

Credential MD

Sex Male

Practice address 701 Grove Rd, Suite 200, Greenville, SC, 29605

Phone (864) 455-8431

Fax (864) 455-8981

Enumeration date Aug 16, 2006

Last updated in NPPES Sep 30, 2020

Taxonomy & licenses

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License 188710-1 (NY) Secondary

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License 36535 (SC) 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
01499903	Medicaid	NY	-

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 Calvert Warren?

The National Provider Identifier (NPI) for Calvert Warren is 1083727846, a Type 1 (individual) record in the CMS NPPES registry.

Where does Calvert Warren practice?

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

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-09-30.