DR. RAHUL CHILAPPA (M.D.) – Critical Care Medicine (Internal Medicine) Physician, NPI 1407117609
Critical Care Medicine (Internal Medicine) Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
1,360 CRITICAL CARE (INTENSIVISTS) in TX
Provider Addresses for DR. RAHUL CHILAPPA (M.D.)
921 GESSNER RD
HOUSTON, TX 770242501
Phone: (615) 371-4423
Fax: (615) 829-8548
Type: Mailing
1000 Central St Ste 615
Evanston, IL 602011779
Phone: (847) 570-2714
Fax: (847) 733-5109
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.
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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: 2025-09-26
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking 11 Medicare enrollment records; no due dates published yet.
Enrollment records
11
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 |
|---|---|---|---|---|
| I20180731001384 | I | Pulmonary Disease | IL | TBD |
| I20200731000479 | I | Internal Medicine | TX | TBD |
| I20230830000329 | I | Critical Care (Intensivists) | GA | TBD |
| I20230906002250 | I | Critical Care (Intensivists) | IN | TBD |
| I20231004000413 | I | Critical Care (Intensivists) | DE | TBD |
| I20231005000427 | I | Critical Care (Intensivists) | OH | TBD |
| I20231025002332 | I | Internal Medicine | CT | TBD |
| I20231025002616 | I | Internal Medicine | NY | TBD |
| I20231206003690 | I | Critical Care (Intensivists) | SC | TBD |
| I20240401000997 | I | Critical Care (Intensivists) | PA | TBD |
| I20250926003110 | I | Internal Medicine | VA | 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 |
|---|---|---|---|---|
| 99291 | Critical care, first 30-74 minutes | 197 | 107 | $0 |
| 99233 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 28 | 23 | $0 |
Insurance plans in this area (ZIP 77024)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Critical Care (Intensivists), Infectious Disease, Internal Medicine | NY | |
| Internal Medicine, Internal Medicine, Critical Care (Intensivists), Pulmonary Disease | NJ | |
| Pulmonary Disease, Critical Care (Intensivists), Internal Medicine | TX | |
| Internal Medicine | VA | |
| Critical Care (Intensivists) | FL | |
| Internal Medicine, Critical Care (Intensivists) | PA |
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