Quick answers
- Does Stephanie H. Hernandez accept Medicare assignment?
- Yes. Medicare's clinician data says Stephanie H. 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 Stephanie H. Hernandez see?
- In 2024, CMS data shows 385 Original Medicare patients and 587 services for Stephanie H. Hernandez. This counts Original Medicare only and measures volume, not quality.
- What is Stephanie H. Hernandez's NPI number?
- 1629243738. 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 Stephanie H. 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 | 385 |
|---|---|
| Services billed to Medicare | 587 |
| Different services or procedures | 11 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)231 services
- Emergency department visit with high level of medical decision making (99285)154 services
- Critical care, first 30-74 minutes (99291)101 services
- Emergency department visit with moderate level of medical decision making (99284)80 services
- Emergency department visit with low level of medical decision making (99283)12 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%
- Arthritis53%
- Diabetes48%
- Ischemic heart disease44%
- Chronic kidney disease39%
Hospitals where Stephanie H. Hernandez works
Medicare's Facility Affiliation Data lists Stephanie H. 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.
- Elmhurst Hospital CenterElmhurst, NY · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 330128
- Mount Sinai HospitalNew York, NY · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 330024
Practice locations
Addresses where Stephanie H. Hernandez is enrolled with Medicare (CMS data updated October 2, 2026).
- 1440 Madison AveNew York, NY 10029 (212) 987‑3100
- 1468 Madison AveNew York, NY 10029 (212) 987‑3100
- 234 E 85th StNew York, NY 10028 (646) 605‑5669
- 7901 BroadwayElmhurst, NY 11373 (718) 334‑4952
Group practices
Medicare enrollment lists Stephanie H. Hernandez as a member of these groups (CMS data updated October 2, 2026).
- Icahn School of Medicine at Mount Sinai2,843 clinicians in the group
- Icahn School of Medicine at Mount Sinai316 clinicians in the group
- Icahn School of Medicine at Mount Sinai48 clinicians in the group
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in New York
Clinicians with the same Medicare primary specialty in New York, NY — not a recommendation.
Other clinicians in Icahn School of Medicine at Mount Sinai
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2005 (21 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1629243738 |
| 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