Quick answers
- Does Gracykutty T. Sebastian accept Medicare assignment?
- Yes. Medicare's clinician data says Gracykutty T. Sebastian accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Gracykutty T. Sebastian see?
- In 2024, CMS data shows 398 Original Medicare patients and 828 services for Gracykutty T. Sebastian. This counts Original Medicare only and measures volume, not quality.
- What is Gracykutty T. Sebastian's NPI number?
- 1629375985. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Gracykutty T. Sebastian, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 398 |
|---|---|
| Services billed to Medicare | 828 |
| Different services or procedures | 16 |
| Participating Medicare provider | Yes |
| Average age of these patients | 78 |
Most frequent services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)249 services
- Hospital discharge day management, more than 30 minutes (99239)165 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)107 services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)81 services
- Prolonged hospital inpatient or observation care evaluation and management service(s) beyond the total time for the primary service (when the primary service has been selected using time on the date of the primary service); each additional 15 minutes by th (G0316)78 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol75%
- Arthritis71%
- Ischemic heart disease49%
- Chronic kidney disease43%
- Heart failure40%
Hospitals where Gracykutty T. Sebastian works
Medicare's Facility Affiliation Data lists Gracykutty T. Sebastian at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Advocate Good Shepherd HospitalBarrington, IL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 140291
- Northwestern Medicine McHenryMcHenry, IL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 140116
Practice locations
Addresses where Gracykutty T. Sebastian is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 6; the Medicare profile lists all.
- 10400 Haligus RdHuntley, IL 60142
- 4201 W Medical Ctr DrMcHenry, IL 60050 (815) 759‑4323
- 4201 W Medical Ctr Dr, Fl 2McHenry, IL 60050 (815) 759‑4800
- 515 Valley View Dr, Suite 201Moline, IL 61265 (312) 695‑0870
- 675 N Saint Clair StChicago, IL 60611
Group practices
Medicare enrollment lists Gracykutty T. Sebastian as a member of this group (CMS data updated October 2, 2026).
- Northwestern Medical Faculty Foundation4,503 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Huntley
Clinicians with the same Medicare primary specialty in Huntley, IL — not a recommendation.
Other clinicians in Northwestern Medical Faculty Foundation
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 1984 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1629375985 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians