John L. Kniaz, DO
Gastroenterology Physician · Munster, IN
John L. Kniaz, DO is a gastroenterology physician with a practice address in Munster, Indiana, and NPI 1659470110, issued on Sep 21, 2006. Check the license (Indiana 02000771, as entered in NPPES) on the Medical Licensing Board of Indiana; the Medicare figures below come from public CMS files.
- Name
- John L. Kniaz
- Credential
- DO
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 02000771 IN
Self-reported in NPPES; status is on the state search - Practice location
- 9410 Calumet Ave Ste 401, Munster, IN 46321
- Phone
- (219) 922-4900
- Enumerated
- Sep 21, 2006
- Record last updated
- Aug 13, 2024
- Fax
- (219) 836-9922
- Medicaid ID
- 100354640A IN
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 372 in Indiana → Look up another NPI →
Also registered at 9410 Calumet Ave Ste 401
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ted George Achufusi, MDGastroenterology Physician1053809392
- Bayan Alsuleiman, MDGastroenterology Physician1760821748
- Cristina Borsilli, NPFamily Nurse Practitioner1629739131
- Amara Dickerson, APNAcute Care Nurse Practitioner1043722622
- Mohammad Elomari, APNFamily Nurse Practitioner1831709153
- Ammar Hassan, D.O.Gastroenterology Physician1023428877
Verify John L. Kniaz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Licensing Board of Indiana
Search for license 02000771Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average gastroenterology physician in 2024
14 Medicare Part D claims, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D.
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.
John L. Kniaz among 372 gastroenterology physician records in Indiana
John L. Kniaz, DO is one of 372 gastroenterology physician records with a practice address in Indiana. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 17% of them.
- NPI issued2006 · 17% of these records are older, 47% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileNo · 73% of these records are
- Record last updated2024 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a Indiana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Indiana
There are 372 gastroenterology physician records in Indiana.
All 372 in Indiana → Every provider in Munster → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Bayan Alsuleiman, MDMunster, IN 463211760821748
- Anoop Appannagari, M.D.Munster, IN 463211912136979
- Hadi Atassi, D.O.Munster, IN 463211407218621
- Joel Cahan, MDMunster, IN 463211699874156
- Gene Chang, M.D.Munster, IN 463211033240411
- Ammar Hassan, D.O.Munster, IN 463211023428877
- David Herbstman, MDMunster, IN 463211841399300
- Mohsen Khan, DOMunster, IN 463211316203367
Common questions
What is John L. Kniaz, DO's NPI number?
John L. Kniaz, DO's National Provider Identifier (NPI) is 1659470110, issued on Sep 21, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John L. Kniaz, DO located?
The NPPES record lists a practice address at 9410 Calumet Ave Ste 401, Munster, IN, 46321. Phone: (219) 922-4900. Providers update this record themselves, so call before visiting.
How can I verify John L. Kniaz, DO's license?
NPPES lists Indiana license number 02000771, 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 John L. Kniaz, DO prescribe under Medicare Part D?
In 2024, John L. Kniaz, DO had 14 Medicare Part D claims; the average among gastroenterology physician prescribers was 811. 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.