Quick answers
- Does Carmen Gnatenco accept Medicare assignment?
- Yes. Medicare's clinician data says Carmen Gnatenco 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 Carmen Gnatenco see?
- In 2024, CMS data shows 298 Original Medicare patients and 1,702 services for Carmen Gnatenco. This counts Original Medicare only and measures volume, not quality.
- What is Carmen Gnatenco's NPI number?
- 1043363708. 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 Carmen Gnatenco, 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 | 298 |
|---|---|
| Services billed to Medicare | 1,702 |
| Different services or procedures | 16 |
| Participating Medicare provider | Yes |
| Average age of these patients | 78 |
Most frequent services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)604 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)462 services
- Injection, vitamin b-12 cyanocobalamin, up to 1000 mcg (J3420)181 services
- Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)150 services
- Hospital discharge day management, more than 30 minutes (99239)146 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%
- Arthritis62%
- Ischemic heart disease47%
- Heart failure43%
- Atrial fibrillation43%
Hospitals where Carmen Gnatenco works
Medicare's Facility Affiliation Data lists Carmen Gnatenco 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 Christ Hospital & Medical CenterOak Lawn, IL · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 140208
- Northwestern Medicine Central Dupage HospitalWinfield, IL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 140242
- Palos Community HospitalPalos Heights, IL · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 140062
Practice locations
Addresses where Carmen Gnatenco is enrolled with Medicare (CMS data updated October 2, 2026).
- 12211 S Harlem Ave, Fl 2Palos Heights, IL 60463 (708) 295‑9399
Specialties
- Internal Medicineprimary
- General Practicealso
Other internal medicine doctors in Palos Heights
Clinicians with the same Medicare primary specialty in Palos Heights, IL — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1995 (31 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1043363708 |
| 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