Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Gregory Todd Greenwood, M.D.

Nephrology Physician in Winston-Salem, NC · enumerated 2005.

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

National Provider Identifier

1316946858

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Registry record

Entity type Individual (Type 1)

Name Dr. Gregory Todd Greenwood

Credential M.D.

Sex Male

Practice address 730 Highland Oaks Dr, Suite 201, Winston-Salem, NC, 27103

Phone (336) 768-2425

Fax (336) 768-4915

Enumeration date Jul 18, 2005

Last updated in NPPES Aug 30, 2021

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 85296 (NC) Secondary

207RN0300X Nephrology Physician Allopathic & Osteopathic Physicians · License 85296 (NC) 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
136NH	Other	NC	BCBS
89136NH	Medicaid	NC	-

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 Gregory Greenwood?

The National Provider Identifier (NPI) for Gregory Greenwood is 1316946858, a Type 1 (individual) record in the CMS NPPES registry.

Where does Gregory Greenwood practice?

The practice location on file with NPPES is in Winston-Salem, NC. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Denise Laurienti Nephrology Physician · Winston-Salem, NC NPI 1023017563 William Moore Nephrology Physician · Winston-Salem, NC NPI 1407855968 Douglas Stewart Internal Medicine Physician · Winston-Salem, NC NPI 1679572135 James Dilley Internal Medicine Physician · Winston-Salem, NC NPI 1801895339 Alexander Hadley Nephrology Physician · Winston Salem, NC NPI 1881679215 Cressent Pressly Family Medicine Physician · Winston Salem, NC NPI 1710959895 Chirapa Sinthusek Endocrinology, Diabetes & Metabolism Physician · Winston-Salem, NC NPI 1386619674 Chirapa Sinthusek, PA Multi-Specialty Clinic/Center · Winston-Salem, NC NPI 1033162557

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-08-30.