Quick answers
- Does Tosan A. Fregene accept Medicare assignment?
- Medicare's clinician data says Tosan A. Fregene may accept Medicare assignment (as of October 2, 2026). Ask the office whether they accept it for your visit.
- How many Medicare patients does Tosan A. Fregene see?
- In 2024, CMS data shows 219 Original Medicare patients and 1,134 services for Tosan A. Fregene. This counts Original Medicare only and measures volume, not quality.
- What is Tosan A. Fregene's NPI number?
- 1336189513. 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 Tosan A. Fregene, 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 | 219 |
|---|---|
| Services billed to Medicare | 1,134 |
| Different services or procedures | 9 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
Most frequent services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)482 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)274 services
- Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)159 services
- Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes (99231)155 services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)43 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 cholesterol72%
- Diabetes57%
- Arthritis57%
- Chronic kidney disease52%
- Ischemic heart disease47%
Hospitals where Tosan A. Fregene works
Medicare's Facility Affiliation Data lists Tosan A. Fregene 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.
- Ascension Providence Hospital, Southfield and NoviSouthfield, MI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 230019
- Chippewa County HospitalMontevideo, MN · Critical Access Hospital · Emergency services: listed by Medicare · CCN 241325
- Detroit Receiving HospitalDetroit, MI · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 230273
- Harper University HospitalDetroit, MI · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 230104
- Sinai-Grace HospitalDetroit, MI · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 230024
Practice locations
Addresses where Tosan A. Fregene is enrolled with Medicare (CMS data updated October 2, 2026).
- 20770 Greenfield Rd, Suite 1aOak Park, MI 48237 (248) 967‑8800
- 824 N 11th StMontevideo, MN 56265 (320) 269‑8877
Group practices
Medicare enrollment lists Tosan A. Fregene as a member of this group (CMS data updated October 2, 2026).
- CCM Health69 clinicians in the group
Specialties
- Hematology/Oncologyprimary
- Hospice/Palliative Carealso
Other hematologist-oncologists in Michigan
Clinicians with the same Medicare primary specialty in Michigan — not a recommendation.
Other clinicians in CCM Health
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1985 (41 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1336189513 |
| 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