Quick answers
- Does Maria Elena L. Gragasin accept Medicare assignment?
- Yes. Medicare's clinician data says Maria Elena L. Gragasin 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 Maria Elena L. Gragasin see?
- In 2024, CMS data shows 26 Original Medicare patients and 323 services for Maria Elena L. Gragasin. This counts Original Medicare only and measures volume, not quality.
- What is Maria Elena L. Gragasin's NPI number?
- 1336136704. 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 Maria Elena L. Gragasin, 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 | 26 |
|---|---|
| Services billed to Medicare | 323 |
| Different services or procedures | 3 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)278 services
- Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)23 services
- Measurement of brain wave activity (eeg), awake and asleep (95819)22 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%
- Heart failure75%
- Ischemic heart disease69%
- Chronic kidney disease69%
- Stroke or mini-stroke69%
Practice locations
Addresses where Maria Elena L. Gragasin is enrolled with Medicare (CMS data updated October 2, 2026).
- 3435 W Van Buren StChicago, IL 60624 (773) 826‑7283
Specialties
- Neurologyprimary
Other neurologists in Chicago
Clinicians with the same Medicare primary specialty in Chicago, IL — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1973 (53 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1336136704 |
| 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