Gregory Lee Guzik, MD
Internal Medicine Physician · Indianapolis, IN
Gregory Lee Guzik, MD is an internal medicine physician with a practice address in Indianapolis, Indiana, and NPI 1447909213, issued on Mar 21, 2022. Check the license (Indiana 01099872A, as entered in NPPES) on the Medical Licensing Board of Indiana; the Medicare figures below come from public CMS files.
- Name
- Gregory Lee Guzik
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 01099872A IN
Self-reported in NPPES; status is on the state search - Practice location
- 535 Barnhill Dr, Indianapolis, IN 46202
- Phone
- (317) 278-0070
- Enumerated
- Mar 21, 2022
- Record last updated
- Apr 16, 2026
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,109 in Indiana → Look up another NPI →
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A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Gregory Lee Guzik in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Licensing Board of Indiana
Search for license 01099872ACheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
93% fewer Medicare Part D claims than the average internal medicine physician in 2024
218 Medicare Part D claims for 50 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium19 claims
- Jardiance13 claims
- Amlodipine Besylate12 claims
- Losartan Potassium12 claims
- Spiriva Respimat12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Gregory Lee Guzik among 2,109 internal medicine physician records in Indiana
Gregory Lee Guzik, MD is one of 2,109 internal medicine physician records with a practice address in Indiana. 85% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2022, is newer than 93% of them.
- NPI issued2022 · 93% of these records are older, 4% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileNo · 69% of these records are
- Record last updated2026 · 43% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Indiana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
699 internal medicine physician records list a practice address in Indianapolis
They are 699 of the 30,493 NPPES records with a practice address in Indianapolis, and 2,109 internal medicine physician records in Indiana.
All 2,109 in Indiana → Every provider in Indianapolis → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Todd Biggerstaff, MDIndianapolis, IN 462021891796157
- Wayne Ellis, MDIndianapolis, IN 462021508848102
- Mason Goodman, MDIndianapolis, IN 462021508848433
- Areeba Kara, M.D.Indianapolis, IN 462021528069978
- Irina Khan, M.D.Indianapolis, IN 462021508852294
- Audrey Maminta, MDIndianapolis, IN 462021518941863
- Patrick McQuillan, M.D.Indianapolis, IN 462021669473989
- Jeffrey Mossler, MDIndianapolis, IN 462021356312896
Common questions
What is Gregory Lee Guzik, MD's NPI number?
Gregory Lee Guzik, MD's National Provider Identifier (NPI) is 1447909213, issued on Mar 21, 2022. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Lee Guzik, MD located?
The NPPES record lists a practice address at 535 Barnhill Dr, Indianapolis, IN, 46202. Phone: (317) 278-0070. Providers update this record themselves, so call before visiting.
How can I verify Gregory Lee Guzik, MD's license?
NPPES lists Indiana license number 01099872A, as entered by the provider. Search the Medical Licensing Board of Indiana at https://www.in.gov/pla/professions/physicians-home/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Gregory Lee Guzik, MD prescribe under Medicare Part D?
In 2024, Gregory Lee Guzik, MD had 218 Medicare Part D claims for 50 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.