Quick answers
- Does Dennis Gelyana accept Medicare assignment?
- Yes. Medicare's clinician data says Dennis Gelyana 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 Dennis Gelyana see?
- In 2024, CMS data shows 242 Original Medicare patients and 2,705 services for Dennis Gelyana. This counts Original Medicare only and measures volume, not quality.
- What is Dennis Gelyana's NPI number?
- 1871600429. 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 Dennis Gelyana, 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 | 242 |
|---|---|
| Services billed to Medicare | 2,705 |
| Different services or procedures | 23 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)1,031 services
- Psychotherapy with evaluation and management visit, 30 minutes (90833)786 services
- Treatment using magnetic field to stimulate nerve cells in brain, subsequent delivery and management (90868)433 services
- Psychotherapy with evaluation and management visit, 45 minutes (90836)204 services
- Therapy using electrical currents (90870)98 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 cholesterol75%
- Depression75%
- High blood pressure69%
- Anxiety57%
- Arthritis50%
- Diabetes30%
Hospitals where Dennis Gelyana works
Medicare's Facility Affiliation Data lists Dennis Gelyana 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 Lutheran General HospitalPark Ridge, IL · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 140223
- Northshore University Healthsystem - Evanston HospitalEvanston, IL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 140010
Practice locations
Addresses where Dennis Gelyana is enrolled with Medicare (CMS data updated October 2, 2026).
- 1500 Waukegan Rd, Suite 213Glenview, IL 60025 (561) 870‑9158
Group practices
Medicare enrollment lists Dennis Gelyana as a member of this group (CMS data updated October 2, 2026).
- Success TMS Professional Services PLLC3 clinicians in the group
Specialties
- Psychiatryprimary
Other psychiatrists in Glenview
Clinicians with the same Medicare primary specialty in Glenview, IL — not a recommendation.
Other clinicians in Success TMS Professional Services PLLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1988 (38 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1871600429 |
| 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