Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Susan Hammond Grosslight, NP

Family Medicine Physician in Winnsboro, SC · enumerated 2006 · practices at Blue Granite Medical Center.

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

National Provider Identifier

1821100835

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Registry record

Entity type Individual (Type 1)

Name Susan Hammond Grosslight

Credential NP

Sex Female

Practice address Winnsboro, SC, 29180

Phone (803) 635-6461

Fax (803) 635-4200

Enumeration date Aug 31, 2006

Last updated in NPPES May 22, 2023

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

163WC1400X College Health Registered Nurse Nursing Service Providers · License R41098 (SC) Secondary

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 17725 (SC) Primary

NP · Nurse Practitioner: An advanced practice registered nurse with graduate training, licensed to diagnose and treat, often with prescriptive authority. About the NP credential

Other identifiers

Identifier	Type	State	Issuer
NP2030	Medicaid	SC	-

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

Is NPI 1821100835 active?

Yes, as of the latest NPPES snapshot, NPI 1821100835 is active (record last updated 2023-05-22).

How do I verify Susan Grosslight's NPI record?

Cross-check NPI 1821100835 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-05-22.