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GREGORY LEE GUZIK MD
NPI 1447909213
Internal Medicine in Indianapolis, IN

Active since March 21, 2022PECOS Enrolled
535 BARNHILL DR, INDIANAPOLIS, IN 46202(317) 278-0070 Get Directions Write a Review

NPPES record last updated: April 16, 2026. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Apr 16, 2026, Jun 7, 2025 (2 updates tracked since 2025).

About Gregory Lee Guzik Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

GREGORY LEE GUZIK MD (NPI 1447909213) is an individual internal medicine provider in Indianapolis, Indiana, licensed in Indiana (01099872A) and active in the NPI registry since March 2022. He is enrolled in Medicare PECOS and is a graduate of Wright State University Boonshoft School Of Medicine (2022).

NPPES Registry Identity

NPI1447909213
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameGREGORY LEE GUZIKCredential: MD
Location Address535 BARNHILL DRIndianapolis, IN 46202-5116
Mailing Address535 Barnhill DrIndianapolis, IN 46202-5116 · (317) 948-6942
Phone(317) 278-0070
Sole ProprietorNo
Medical School CMSWright State University Boonshoft School Of MedicineGraduated 2022
Enumeration DateMarch 21, 2022
Last NPPES UpdateApril 16, 20262 updates tracked since enumeration
NPPES CertifiedApril 16, 2026
✔ NPI 1447909213 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in IN · 01099872A
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
535 BARNHILL DR, Indianapolis, IN 46202
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include CareSource.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Gregory Lee Guzik Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID7719364579
PECOS Enrollment IDI20260707000466
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

2

Medicare enrollment records show Gregory Guzik reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Innovative Hematology, Inc
9.1 mi
Hematology & Oncology
8326 NAAB RD
Indianapolis, IN 46260
  • Reassigned Medicare billing, Indiana enrollment
  • 45 clinicians in this Medicare group
NPI 1881455541 (317) 871-0000
Indiana Hemophilia & Thrombosis Center, Inc.
9.2 mi
Hematology & Oncology
8326 NAAB RD
Indianapolis, IN 46260
  • Reassigned Medicare billing, Indiana enrollment
  • 41 clinicians in this Medicare group
NPI 1659364800 (317) 871-0000

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician 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.

New Patient
$122.49 typical visit price
range $53.07 – $161.76
Typical copayment $30.62 (range $13.26 – $40.44)
Most-billed visit code 99204
Established Patient
$94.22 typical visit price
range $16.93 – $132.22
Typical copayment $23.55 (range $4.23 – $33.05)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. ANTON ALEXI CABELLON D.O.
Internal Medicine (Nephrology)
535 BARNHILL DR, RT 150
INDIANAPOLIS, IN 46202
Marion County (317) 948-0728
LINDA BATTIATO
Registered Nurse
535 BARNHILL DR
INDIANAPOLIS, IN 46202
Marion County (317) 278-6489
CHRISTIAN JON NELSON PHD
Psychologist (Clinical)
535 BARNHILL DR
INDIANAPOLIS, IN 46202
Marion County (317) 948-2538
AMANJOT SINGH SETHI M.D.
Specialist
535 BARNHILL DR, SUITE 420
INDIANAPOLIS, IN 46202
Marion County (317) 278-1979
DR. ANITA AHMED TURK M.D.
Internal Medicine (Hematology & Oncology)
535 BARNHILL DR
INDIANAPOLIS, IN 46202
Marion County (317) 274-0335
JENNIFER MARIE KING MD
Internal Medicine (Hematology & Oncology)
535 BARNHILL DR
INDIANAPOLIS, IN 46202
Marion County (317) 944-0920
NANCY CAROL ISSA MD
Internal Medicine (Hematology & Oncology)
535 BARNHILL DR
INDIANAPOLIS, IN 46202
Marion County (317) 948-6942
BETH A KIRSCH RDN, CSO, LD
Dietitian, Registered (Nutrition, Oncology)
535 BARNHILL DR
INDIANAPOLIS, IN 46202
Marion County (317) 440-6242

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 Gregory Guzik's NPI number?

The NPI number for Gregory Guzik is 1447909213. It was assigned to this individual provider in the NPPES registry on March 21, 2022.

Where is Gregory Guzik located?

Gregory Guzik practices at 535 Barnhill Dr, Indianapolis, IN 46202. The listed phone number is (317) 278-0070.

What is Gregory Guzik's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Gregory Guzik enrolled in Medicare?

Yes. Gregory Guzik is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Gregory Guzik's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Gregory Guzik reassigns Medicare benefits to 2 organizations: Innovative Hematology, Inc (Indianapolis, IN) and Indiana Hemophilia & Thrombosis Center, 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 Gregory Guzik's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Gregory Guzik accept?

Health plans from CareSource list Gregory Guzik 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.

When was this NPI record last updated?

The NPPES record for Gregory Guzik was last updated on April 16, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.