Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Theresa Lynne Giannini, NP

Adult Health Nurse Practitioner in Indianapolis, IN · enumerated 2006.

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

National Provider Identifier

1588775571

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Registry record

Entity type Individual (Type 1)

Name Theresa Lynne Giannini

Credential NP

Sex Female

Practice address 1801 N Senate Blvd Ste 4000, Indianapolis, IN, 46202

Phone (317) 962-0500

Fax (317) 962-0501

Enumeration date Aug 31, 2006

Last updated in NPPES Aug 5, 2025

Taxonomy & licenses

363LA2200X Adult Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 71001965A (IN) 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
000000491503	Other	-	BCBS PIN
P00351800	Other	-	RAILROAD MEDICARE PIN
P01214693	Other	IN	RR MEDICARE PTAN
200842890A	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

Is NPI 1588775571 active?

Yes, as of the latest NPPES snapshot, NPI 1588775571 is active (record last updated 2025-08-05).

How do I verify Theresa Giannini's NPI record?

Cross-check NPI 1588775571 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 2025-08-05.