Siju T. Chacko, M.D.
Infectious Disease Physician · Merrillville, IN
Siju T. Chacko, M.D. is an infectious disease physician with a practice address in Merrillville, Indiana, and NPI 1720017262, issued on Jun 30, 2006. Check the license (Indiana 01064885A, as entered in NPPES) on the Medical Licensing Board of Indiana; the Medicare figures below come from public CMS files.
- Name
- Siju T. Chacko
- Credential
- M.D.
- Primary taxonomy
- Infectious Disease Physician 207RI0200X
- License numbers
- 01064885A IN
036101193 IL
Self-reported in NPPES; status is on the state search - Practice location
- 200 E 86TH PL, Merrillville, IN 46410
- Phone
- (219) 972-1547
- Enumerated
- Jun 30, 2006
- Record last updated
- May 23, 2024
- Fax
- (219) 972-1641
- Medicaid IDs
- 200892400 IN
036101193 IL - Medicare enrollment
- Enrolled (PECOS I20080709000094); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest infectious disease physician records → All 162 in Indiana → Look up another NPI →
Also registered at 200 E 86TH PL
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Vijay Dave, MDCardiovascular Disease Physician1316933443
- Patty MedingNurse Practitioner1912018508
- Thach Nguyen, MDCardiovascular Disease Physician1700872769
- Luwanga Okoro, D.OCardiovascular Disease Physician1689673683
- Harish Shah, MDCardiovascular Disease Physician1740276682
Verify Siju T. Chacko in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Licensing Board of Indiana
Search for license 01064885ACheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
21% fewer Medicare Part D claims than the average infectious disease physician in 2024
547 Medicare Part D claims for 236 beneficiaries, against an average of 689 among the 7,388 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims.
Most prescribed
- Doxycycline Monohydrate60 claims
- Amoxicillin-Clavulanate Potass59 claims
- Vancomycin Hcl37 claims
- Levofloxacin35 claims
- Ciprofloxacin Hcl31 claims
- Cephalexin29 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 80 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $824.79
23 payments; by number, the most common kind was food and beverage; the largest payer was ViiV Healthcare Company. The 3,895 providers of this specialty with any payment received $4,362.19 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
- Infectious Disease Specialists PCValparaiso, IN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Siju T. Chacko among 162 infectious disease physician records in Indiana
Siju T. Chacko, M.D. is one of 162 infectious disease 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 10% of them.
- NPI issued2006 · 10% of these records are older, 51% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 75% of these records are
- Graduated1994 · median 2002 among the 122 with a school on file
- Record last updated2024 · 39% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RI0200X and a Indiana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Infectious Disease Physician providers in Indiana
There are 162 infectious disease physician records in Indiana.
All 162 in Indiana → Every provider in Merrillville → Infectious Disease Physician nationwide →
The 8 infectious disease physician records with the nearest ZIP codes
- Tajudeen Ogbara, M.D.Whiting, IN 463941124005418
- Oliver Diamante, M.DValparaiso, IN 463831669781050
- John DoughertyValparaiso, IN 463831053722934
- Erika Young, D.O.Valparaiso, IN 463831750363206
- Mandavi Kulkarni, MDMichigan City, IN 463601770512659
- Hamid Safavi, MDMichigan City, IN 463601598722878
- Mohammad Alkhatib, M.D.Hobart, IN 463421932436177
- Denise Weaver, MDHobart, IN 463421093772378
Common questions
What is Siju T. Chacko, M.D.'s NPI number?
Siju T. Chacko, M.D.'s National Provider Identifier (NPI) is 1720017262, issued on Jun 30, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Siju T. Chacko, M.D. located?
The NPPES record lists a practice address at 200 E 86TH PL, Merrillville, IN, 46410. Phone: (219) 972-1547. Providers update this record themselves, so call before visiting.
How can I verify Siju T. Chacko, M.D.'s license?
NPPES lists Indiana license number 01064885A, 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 Siju T. Chacko, M.D. prescribe under Medicare Part D?
In 2024, Siju T. Chacko, M.D. had 547 Medicare Part D claims for 236 beneficiaries; the average among infectious disease physician prescribers was 689. Part D covers Medicare prescriptions only.
What is Siju T. Chacko, M.D.'s MIPS final score?
The 2023 MIPS final score is 80 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.