Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. William Andrew Haislip, MS, APRN, FNP-BC

Family Nurse Practitioner in Greenville, SC · enumerated 2020 · practices at Millstone Healthcare Associates, P.A..

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

National Provider Identifier

1407454853

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Mr. William Andrew Haislip

Credential MS, APRN, FNP-BC

Sex Male

Practice address 3029 White Horse Rd, Greenville, SC, 29611

Phone (864) 269-2131

Enumeration date Oct 16, 2020

Last updated in NPPES Jun 28, 2023

Taxonomy & licenses

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 24359 (SC) Primary

APRN · Advanced Practice Registered Nurse: An umbrella credential covering NPs, CRNAs, CNMs, and clinical nurse specialists. About the APRN 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

Is NPI 1407454853 active?

Yes, as of the latest NPPES snapshot, NPI 1407454853 is active (record last updated 2023-06-28).

How do I verify William Haislip's NPI record?

Cross-check NPI 1407454853 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

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-06-28.