Quick answers
- Does Mary-Jennelle Guevara accept Medicare assignment?
- Yes. Medicare's clinician data says Mary-Jennelle Guevara 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 Mary-Jennelle Guevara see?
- In 2024, CMS data shows 168 Original Medicare patients and 2,280 services for Mary-Jennelle Guevara. This counts Original Medicare only and measures volume, not quality.
- What is Mary-Jennelle Guevara's NPI number?
- 1225397268. 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 Mary-Jennelle Guevara, 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 | 168 |
|---|---|
| Services billed to Medicare | 2,280 |
| Different services or procedures | 10 |
| Participating Medicare provider | Yes |
| Average age of these patients | 82 |
Most frequent services
- Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes (99309)1,549 services
- Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more (99308)347 services
- Residence visit for established patient with high level of medical decision making, per day, if using time, at least 60 minutes (99350)172 services
- Residence visit for established patient with moderate level of medical decision making, per day, if using time, at least 40 minutes (99349)95 services
- Initial nursing facility care with high level of medical decision making, per day, if using time, 50 minutes or more (99306)24 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%
- Arthritis69%
- Depression62%
- Alzheimer's disease or dementia55%
- Heart failure54%
Practice locations
Addresses where Mary-Jennelle Guevara is enrolled with Medicare (CMS data updated October 2, 2026).
- 1600 W Dempster St, Suite 120Park Ridge, IL 60068 (847) 590‑1500
- 3210 N Kilbourn Ave, Unit 11Chicago, IL 60641 (773) 951‑0941
Group practices
Medicare enrollment lists Mary-Jennelle Guevara as a member of this group (CMS data updated October 2, 2026).
- Geri Care Ltd12 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Park Ridge
Clinicians with the same Medicare primary specialty in Park Ridge, IL — not a recommendation.
Other clinicians in Geri Care Ltd
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| School | University Of Illinois College Of Med (chi/peor/rock/chm-Urb) |
| Graduation year | 2011 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1225397268 |
| 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
- 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