KIRK JIHYON PAK (M.D., PH.D., M.SC.) – Hospitalist Physician, NPI 1477812956
Hospitalist Physician
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Profile Insights
NPPES metrics only — not quality of care.
878 HOSPITALIST in IN
Provider Addresses for KIRK JIHYON PAK (M.D., PH.D., M.SC.)
1104 E Grace St
Rensselaer, IN 47978
Phone: (219) 866-5141
Fax: (219) 866-3234
Type: Location
PO BOX 781076
DETROIT, MI 482781076
Phone: (317) 528-4800
Fax: (317) 865-1479
Type: Mailing
1104 E GRACE ST
RENSSELAER, IN 47978
Phone: (219) 866-5141
Fax: (219) 866-3234
Type: Location
PO BOX 735044
CHICAGO, IL 606735044
Phone: (800) 326-2250
Type: Mailing
W3985 COUNTY ROAD NN
ELKHORN, WI 531214337
Phone: (262) 741-2000
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
No Open Payments data available for this provider.
This can happen when there are no reportable CMS Open Payments records.
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: 2025-02-26
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking 2 Medicare enrollment records; no due dates published yet.
Enrollment records
2
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 |
|---|---|---|---|---|
| I20170906001771 | I | Hospitalist | IN | TBD |
| I20250226000301 | I | Internal Medicine | WI | 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 |
|---|---|---|---|---|
| 99233 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 216 | 131 | $0 |
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 95 | 76 | $0 |
| 99239 | Hospital discharge day management, more than 30 minutes | 77 | 77 | $0 |
| 99223 | Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 35 | 35 | $0 |
| 99291 | Critical care, first 30-74 minutes | 34 | 31 | $0 |
Insurance plans in this area (ZIP 47978)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Internal Medicine | IN | |
| Physician Assistant | IN | |
| Internal Medicine | IN | |
| Internal Medicine | IN | |
| Nurse Practitioner | IN | |
| Internal Medicine | IN | |
| Internal Medicine | IN | |
| Internal Medicine | MI | |
| - | IN | |
| Nurse Practitioner | IN |
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