DR. SIJU T CHACKO (M.D.) – Infectious Disease Physician, NPI 1720017262
Infectious Disease Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
190 INFECTIOUS DISEASE in IN
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Provider Addresses for DR. SIJU T CHACKO (M.D.)
PO BOX 10667
MERRILLVILLE, IN 464110667
Phone: (219) 972-1547
Fax: (219) 972-1641
Type: Mailing
Indianapolis Blvd, Highland Terrace Estates, Highland, Lake County, Indiana, 46322, United States
HIGHLAND, IN 463222500
Phone: (219) 972-1547
Fax: (219) 972-1641
Type: Mailing
200 E 86TH PL
MERRILLVILLE, IN 464106258
Phone: (219) 972-1547
Fax: (219) 972-1641
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 53 Open Payments records for all available years, with a total value of $1,965.
Total Amount is formed as General ($1,965) + Research ($0) + Ownership ($0) = $1,965.
Last reported payment date: 2024-11-19 • Largest payer in this snapshot: ViiV Healthcare Company ($538).
Total Amount
$1,965
General + Research + Ownership
Payments
53
Total payment records
General Amount
$1,965
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-11-19
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| ViiV Healthcare Company | $538 |
| Paratek Pharmaceuticals, Inc. | $270 |
| ABBVIE INC. | $260 |
| Melinta Therapeutics, LLC | $193 |
| ModernaTX, Inc. | $175 |
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2008-07-09
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20080709000094 | I | Infectious Disease | IN | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 2,712 | 578 | $0 |
| 99222 | Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 417 | 355 | $0 |
| 99233 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 58 | 49 | $0 |
| 99231 | Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes | 26 | 21 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 25 | 21 | $0 |
Insurance plans in this area (ZIP 46411)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Infectious Disease | IN | |
| Internal Medicine, Infectious Disease | MO | |
| Nurse Practitioner | IN | |
| Nurse Practitioner | IN | |
| Nurse Practitioner | IN | |
| Nurse Practitioner | IN | |
| - | IN | |
| Infectious Disease | IN | |
| Infectious Disease | IN | |
| Infectious Disease, Internal Medicine | IN |
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