Quick answers
- Does Juan O. Hernandez accept Medicare assignment?
- Yes. Medicare's clinician data says Juan O. Hernandez 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 Juan O. Hernandez see?
- In 2024, CMS data shows 1,485 Original Medicare patients and 2,486 services for Juan O. Hernandez. This counts Original Medicare only and measures volume, not quality.
- What is Juan O. Hernandez's NPI number?
- 1336147198. 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 Juan O. Hernandez, 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 | 1,485 |
|---|---|
| Services billed to Medicare | 2,486 |
| Different services or procedures | 21 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)676 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)416 services
- Ultrasound of heart with color-depicted blood flow, rate, direction and valve function (93306)369 services
- Exercise or drug-induced heart stress test with electrocardiogram (ecg) with supervision by physician (93016)224 services
- Exercise or drug-induced heart stress test with electrocardiogram (ecg) with review by physician (93018)223 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%
- Arthritis52%
- Ischemic heart disease48%
- Atrial fibrillation43%
- Diabetes39%
Hospitals where Juan O. Hernandez works
Medicare's Facility Affiliation Data lists Juan O. Hernandez 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.
- Edward W Sparrow HospitalLansing, MI · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 230230
- Memorial HealthcareOwosso, MI · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 230121
- Sparrow Ionia HospitalIonia, MI · Critical Access Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 231331
- University of Michigan Health - Sparrow EatonCharlotte, MI · Critical Access Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 231327
- University of Michigan Health- Sparrow ClintonSaint Johns, MI · Critical Access Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 231326
Practice locations
Addresses where Juan O. Hernandez is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 6; the Medicare profile lists all.
- 1140 E Michigan AveLansing, MI 48912
- 1215 E Michigan AveLansing, MI 48912
- 300 Health Park Dr, Suite 301Owosso, MI 48867 (989) 723‑3613
- 321 E Harris StCharlotte, MI 48813
- 3565 S State RdIonia, MI 48846
Group practices
Medicare enrollment lists Juan O. Hernandez as a member of this group (CMS data updated October 2, 2026).
- Edward W Sparrow Hospital Association730 clinicians in the group
Specialties
Find other Cardiovascular Disease (Cardiology) doctors in Michigan →
Other cardiologists in Lansing
Clinicians with the same Medicare primary specialty in Lansing, MI — not a recommendation.
Other clinicians in Edward W Sparrow Hospital Association
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Ponce School Of Medicine |
| Graduation year | 1984 (42 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1336147198 |
| 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