Quick answers
- Does Karl S. Fernandes accept Medicare assignment?
- Yes. Medicare's clinician data says Karl S. Fernandes 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 Karl S. Fernandes see?
- In 2024, CMS data shows 798 Original Medicare patients and 2,030 services for Karl S. Fernandes. This counts Original Medicare only and measures volume, not quality.
- What is Karl S. Fernandes's NPI number?
- 1497736441. 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 Karl S. Fernandes, 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 | 798 |
|---|---|
| Services billed to Medicare | 2,030 |
| Different services or procedures | 36 |
| 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 50 minutes (99233)549 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)263 services
- Critical care, first 30-74 minutes (99291)156 services
- Test to examine how well the lungs exchange gases (94729)145 services
- Test to measure expiratory airflow and volume (94010)130 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%
- Arthritis55%
- COPD51%
- Ischemic heart disease45%
- Heart failure43%
Hospitals where Karl S. Fernandes works
Medicare's Facility Affiliation Data lists Karl S. Fernandes 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.
- Bay Park Community HospitalOregon, OH · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 360259
- Mercy St Vincent Medical CenterToledo, OH · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 360112
- ProMedica Toledo HospitalToledo, OH · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 360068
- Wood County HospitalBowling Green, OH · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 360029
Practice locations
Addresses where Karl S. Fernandes is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 7; the Medicare profile lists all.
- 1050 Isaac Streets Dr, Suite 134Oregon, OH 43616 (419) 843‑7800
- 1661 Holland RdMaumee, OH 43537 (419) 843‑7800
- 2142 N Cove BlvdToledo, OH 43606 (419) 479‑5690
- 2702 Navarre AveOregon, OH 43616
- 4235 Secor RdToledo, OH 43623
Group practices
Medicare enrollment lists Karl S. Fernandes as a member of these groups (CMS data updated October 2, 2026).
- Toledo Clinic Incorporated210 clinicians in the group
- Wood Health Company LLC61 clinicians in the group
Specialties
Other critical care doctors in Ohio
Clinicians with the same Medicare primary specialty in Ohio — not a recommendation.
Other clinicians in Toledo Clinic Incorporated
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Ohio State University College Of Medicine |
| Graduation year | 1991 (35 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1497736441 |
| 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