Andrej Zajac, M.D.
Radiation Oncology Physician · Munster, IN
Andrej Zajac, M.D. is a radiation oncology physician with a practice address in Munster, Indiana, and NPI 1316929623, issued on Nov 14, 2005. Check the license (Indiana 01040122, as entered in NPPES) on the Medical Licensing Board of Indiana; the Medicare figures below come from public CMS files.
- Name
- Andrej Zajac
- Credential
- M.D.
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License number
- 01040122 IN
Self-reported in NPPES; status is on the state search - Practice location
- 901 Macarthur Blvd, Munster, IN 46321
- Phone
- (219) 836-6390
- Enumerated
- Nov 14, 2005
- Record last updated
- Jun 4, 2013 (not updated in 13 years: call before relying on the address or phone)
- Medicaid ID
- 100327210 IN
- Medicare enrollment
- Enrolled (PECOS I20080808000696); accepts Medicare assignment
- Medical or professional school
- Jefferson Medical College Of Thomas Jefferson University, 1981
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 135 in Indiana → Look up another NPI →
Also registered at 901 Macarthur Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Betsy Abraham, PHARMDPharmacist1154939007
- Anjali Ahn, M.D.Emergency Medicine Physician1306171798
- Makenzie AliNurse Practitioner1215650478
- Amy AllenCritical Care Medicine Registered Nurse1457042996
- Ericka Allen, CSFASurgical Assistant1104305713
- Kimberly Allen, MDAnesthesiology Physician1386273951
Verify Andrej Zajac in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Licensing Board of Indiana
Search for license 01040122Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% more Medicare Part D claims than the average radiation oncology physician in 2024
263 Medicare Part D claims for 76 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims. 25 claims were for opioids.
Most prescribed
- Tamsulosin Hcl101 claims
- Hydrocodone-Acetaminophen17 claims
- Orgovyx17 claims
- Ibuprofen15 claims
- Dexamethasone14 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.
Industry payments in 2024: $62.97
3 payments; by number, the most common kind was food and beverage; the largest payer was Bayer Healthcare Pharmaceuticals Inc. The 3,275 providers of this specialty with any payment received $1,897.85 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Community Care Network IncHobart, IN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Andrej Zajac among 135 radiation oncology physician records in Indiana
Andrej Zajac, M.D. is one of 135 radiation oncology 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 74% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 76% of these records are
- Graduated1981 · median 2002 among the 103 with a school on file
- Record last updated2013 · 53% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0001X and a Indiana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Radiation Oncology Physician providers in Indiana
There are 135 radiation oncology physician records in Indiana.
All 135 in Indiana → Every provider in Munster → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Maria Aguirre, M.D.Munster, IN 463211710205067
- Virag Dandekar, MDMunster, IN 463211861620403
- Cory Hogue, M.D.Munster, IN 463211720438286
- Robert Prock, MDMunster, IN 463211457359309
- Neil Seif, M.D.Munster, IN 463211316077662
- Urmi Kalokhe, MDHammond, IN 463201891793345
- Allan Cass, MDCrown Point, IN 463071609889203
- Joy Allen, MDMichigan City, IN 463601124034905
Common questions
What is Andrej Zajac, M.D.'s NPI number?
Andrej Zajac, M.D.'s National Provider Identifier (NPI) is 1316929623, issued on Nov 14, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Andrej Zajac, M.D. located?
The NPPES record lists a practice address at 901 Macarthur Blvd, Munster, IN, 46321. Phone: (219) 836-6390. Providers update this record themselves, so call before visiting.
How can I verify Andrej Zajac, M.D.'s license?
NPPES lists Indiana license number 01040122, 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 Andrej Zajac, M.D. prescribe under Medicare Part D?
In 2024, Andrej Zajac, M.D. had 263 Medicare Part D claims for 76 beneficiaries; the average among radiation oncology physician prescribers was 134. 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.