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

Lonna L Williams, APRN

Adult Health Nurse Practitioner in Indianapolis, IN · enumerated 2005.

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

National Provider Identifier

1851390918

Verified

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Registry record

Entity type Individual (Type 1)

Name Lonna L Williams

Credential APRN

Sex Female

Practice address Indianapolis, IN, 46237

Phone (317) 893-1900

Fax (317) 893-1901

Enumeration date Jul 20, 2005

Last updated in NPPES Feb 28, 2023

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

Taxonomy & licenses

363LA2200X Adult Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License ARNP 9425102 (FL) Secondary

363LA2200X Adult Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 71001597A (IN) Primary

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

Other identifiers

Identifier	Type	State	Issuer
IR475Z	Other	FL	MEDICARE
P01134429	Other	IN	MEDICARE RR
P01214620	Other	IN	RR MEDICARE PTAN
016694800	Medicaid	FL	-
200822790	Medicaid	IN	-

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 Lonna Williams?

The National Provider Identifier (NPI) for Lonna Williams is 1851390918, a Type 1 (individual) record in the CMS NPPES registry.

Where does Lonna Williams practice?

The practice location on file with NPPES is in Indianapolis, IN. 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 2023-02-28.