Quick answers
- Does Dean G. Tsarwhas accept Medicare assignment?
- Yes. Medicare's clinician data says Dean G. Tsarwhas 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 Dean G. Tsarwhas see?
- In 2024, CMS data shows 439 Original Medicare patients and 2,100 services for Dean G. Tsarwhas. This counts Original Medicare only and measures volume, not quality.
- What is Dean G. Tsarwhas's NPI number?
- 1093797987. 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 Dean G. Tsarwhas, 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 | 439 |
|---|---|
| Services billed to Medicare | 2,100 |
| Different services or procedures | 19 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)917 services
- Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)561 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)295 services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)94 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)74 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 cholesterol74%
- High blood pressure71%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)57%
- Arthritis45%
- Ischemic heart disease33%
- Chronic kidney disease29%
Hospitals where Dean G. Tsarwhas works
Medicare's Facility Affiliation Data lists Dean G. Tsarwhas 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.
- Northwestern Lake Forest HospitalLake Forest, IL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 140130
- Northwestern Medicine Central Dupage HospitalWinfield, IL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 140242
- Northwestern Medicine McHenryMcHenry, IL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 140116
- Northwestern Memorial HospitalChicago, IL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 140281
Practice locations
Addresses where Dean G. Tsarwhas is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 14; the Medicare profile lists all.
- 1000 N Westmoreland Rd, Pavillion B 3rd FlLake Forest, IL 60045 (847) 535‑8500
- 1000 Westmoreland RdLake Forest, IL 60045 (847) 234‑5600
- 1200 N Westmoreland Rd, Suite 100Lake Forest, IL 60045 (847) 735‑8500
- 1475 E Belvidere RdGrayslake, IL 60030
- 4445 W Irving Park RdChicago, IL 60641
Group practices
Medicare enrollment lists Dean G. Tsarwhas as a member of this group (CMS data updated October 2, 2026).
- Northwestern Medical Faculty Foundation4,503 clinicians in the group
Specialties
- Hematology/Oncologyprimary
- Internal Medicinealso
- Medical Oncologyalso
Other hematologist-oncologists in Lake Forest
Clinicians with the same Medicare primary specialty in Lake Forest, 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 | MD |
|---|---|
| Medical school | Northeastern Ohio University College Of Medicine |
| Graduation year | 1987 (39 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) | 1093797987 |
| 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