Gregory Alan Zilligen, M.D.
Anesthesiology Physician · Indianapolis, IN
Gregory Alan Zilligen, M.D. is an anesthesiology physician with a practice address in Indianapolis, Indiana, and NPI 1548550692, issued on Apr 11, 2011. Check the license (Indiana 01073439, as entered in NPPES) on the Medical Licensing Board of Indiana; the Medicare figures below come from public CMS files.
- Name
- Gregory Alan Zilligen
- Credential
- M.D.
- Primary taxonomy
- Anesthesiology Physician 207L00000X
- License number
- 01073439 IN
Self-reported in NPPES; status is on the state search - Practice location
- 8040 Clearvista Pkwy, Indianapolis, IN 46256
- Phone
- (317) 614-9850
- Enumerated
- Apr 11, 2011
- Record last updated
- Apr 2, 2015 (not updated in 11 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20150422002272); accepts Medicare assignment
- Medical or professional school
- Indiana University School Of Medicine, 2011
- Entity
- Type 1 · individual
8 nearest anesthesiology physician records → All 1,448 in Indiana → Look up another NPI →
Also registered at 8040 Clearvista Pkwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Scott Beall, M.D.Anesthesiology Physician1699002055
- Louis Bojrab, M.D.Anesthesiology Physician1376519660
- Neal Brassard, MDAnesthesiology Physician1962777094
Verify Gregory Alan Zilligen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Licensing Board of Indiana
Search for license 01073439Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Hancock Physician Network LLCGreenfield, IN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregory Alan Zilligen among 1,448 anesthesiology physician records in Indiana
Gregory Alan Zilligen, M.D. is one of 1,448 anesthesiology physician records with a practice address in Indiana. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 71% of them.
- NPI issued2011 · 71% of these records are older, 27% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated2011 · median 2004 among the 1,071 with a school on file
- Record last updated2015 · 50% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207L00000X and a Indiana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
622 anesthesiology physician records list a practice address in Indianapolis
They are 622 of the 30,493 NPPES records with a practice address in Indianapolis, and 1,448 anesthesiology physician records in Indiana.
All 1,448 in Indiana → Every provider in Indianapolis → Anesthesiology Physician nationwide →
The 8 anesthesiology physician records with the nearest ZIP codes
- Louis Bojrab, M.D.Indianapolis, IN 462561376519660
- Michael Caldwell, M.D.Indianapolis, IN 462561972597169
- Jacqueline Graber, M.D.Indianapolis, IN 462561952396079
- Michael Guzman, M.D.Indianapolis, IN 462561245207869
- Samuel Hennessee, M.D.Indianapolis, IN 462561932175569
- Jannette Hogshire, M.D.Indianapolis, IN 462561154397560
- Paul Kane, MDIndianapolis, IN 462561831165273
- Kevin Kiley, M.D.Indianapolis, IN 462561518933704
Common questions
What is Gregory Alan Zilligen, M.D.'s NPI number?
Gregory Alan Zilligen, M.D.'s National Provider Identifier (NPI) is 1548550692, issued on Apr 11, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Alan Zilligen, M.D. located?
The NPPES record lists a practice address at 8040 Clearvista Pkwy, Indianapolis, IN, 46256. Phone: (317) 614-9850. Providers update this record themselves, so call before visiting.
How can I verify Gregory Alan Zilligen, M.D.'s license?
NPPES lists Indiana license number 01073439, 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.
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.