THERESA LYNNE GIANNINI NP
NPI 1588775571
Nurse Practitioner - Adult Health in Indianapolis, IN
About Theresa Lynne Giannini Np NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
THERESA LYNNE GIANNINI NP (NPI 1588775571) is an individual adult health provider in Indianapolis, Indiana, licensed in Indiana (71001965A) and active in the NPI registry since August 2006. She is enrolled in Medicare PECOS, is affiliated with Indiana University Health, and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Secondary Practice Locations 2
Other Identifiers 4
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Theresa Lynne Giannini Np is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
3Medicare enrollment records show Theresa Giannini reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Indianapolis, IN 46202
- Reassigned Medicare billing, Indiana enrollment
- 1,781 clinicians in this Medicare group
Indianapolis, IN 46202
- Reassigned Medicare billing, Indiana enrollment
- 5,212 clinicians in this Medicare group
Indianapolis, IN 46202
- Reassigned Medicare billing, Indiana enrollment
- 19 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 2
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Indiana University Health
Acute Care Hospitals · Indianapolis, INIu Health West Hospital
Acute Care Hospitals · Avon, INIndiana University Health North Hospital
Acute Care Hospitals · Carmel, INPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 46202 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 15
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
INDIANAPOLIS, IN 46202
INDIANAPOLIS, IN 46202
INDIANAPOLIS, IN 46202
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Theresa Giannini's NPI number?
The NPI number for Theresa Giannini is 1588775571. It was assigned to this individual provider in the NPPES registry on August 31, 2006. The provider is also known as Theresa L Brown Rn.
Where is Theresa Giannini located?
Theresa Giannini practices at 1801 N Senate Blvd Ste 4000, Indianapolis, IN 46202. The listed phone number is (317) 962-0500.
What is Theresa Giannini's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Adult Health, with taxonomy code 363LA2200X.
Is Theresa Giannini enrolled in Medicare?
Yes. Theresa Giannini is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Theresa Giannini's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Theresa Giannini reassigns Medicare benefits to 3 organizations: Indiana University Health Care Associates, Inc. (Indianapolis, IN), Iu Health Medical Group, LLC (Indianapolis, IN) and University Vascular Surgery, Inc (Indianapolis, IN). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Theresa Giannini's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Theresa Giannini accept?
Health plans from Ambetter Health, Ambetter from Buckeye Health Plan, Ambetter from Meridian, Anthem Blue Cross and Blue Shield and CareSource and 1 other insurer list Theresa Giannini as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Theresa Giannini affiliated with any hospitals?
According to CMS data, Theresa Giannini is affiliated with Indiana University Health, Iu Health West Hospital and Indiana University Health North Hospital.
When was this NPI record last updated?
The NPPES record for Theresa Giannini was last updated on August 5, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Theresa Lynne Giannini, NP · NPI 1588775571
Adult Health physician in Indianapolis, Indiana. Individual provider, active in the CMS NPPES registry since August 31, 2006.
## Identity
- **NPI:** 1588775571 (Entity type: Individual)
- **Enumerated:** August 31, 2006
- **Primary specialty:** Nurse Practitioner - Adult Health · taxonomy 363LA2200X
- **State license:** 71001965A (Indiana)
- **Sole proprietor:** No
## Practice location
- **Address:** 1801 N SENATE BLVD STE 4000, Indianapolis, IN 46202-1184
- **Phone:** (317) 962-0500 · **Fax:** (317) 962-0501
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): Indiana University Health Care Associates, Inc. (NPI 1679949002, Indianapolis, IN); Iu Health Medical Group, LLC (NPI 1326893777, Indianapolis, IN); University Vascular Surgery, Inc (NPI 1043328487, Indianapolis, IN) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2005
## Record status
- **NPPES last updated:** August 5, 2025
- **Other identifiers:** Other 000000491503; Other P00351800; Other P01214693 (IN); and 1 more
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Source: [NPI Profile](https://npiprofile.com/npi/1588775571) · Data from the CMS NPPES public registry.