Quick answers
- Does Rachel A. Warby accept Medicare assignment?
- Yes. Medicare's clinician data says Rachel A. Warby 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 Rachel A. Warby see?
- In 2024, CMS data shows 342 Original Medicare patients and 374 services for Rachel A. Warby. This counts Original Medicare only and measures volume, not quality.
- What is Rachel A. Warby's NPI number?
- 1407173081. 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 Rachel A. Warby, 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 | 342 |
|---|---|
| Services billed to Medicare | 374 |
| Different services or procedures | 16 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Emergency department visit with high level of medical decision making (99285)204 services
- Emergency department visit with moderate level of medical decision making (99284)63 services
- Hospital discharge day management, 30 minutes or less (99238)38 services
- Critical care, first 30-74 minutes (99291)28 services
- Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)17 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%
- Arthritis58%
- Ischemic heart disease48%
- Chronic kidney disease48%
- Diabetes42%
Hospitals where Rachel A. Warby works
Medicare's Facility Affiliation Data lists Rachel A. Warby 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 Genesys HospitalGrand Blanc, MI · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 230197
- Memorial HealthcareOwosso, MI · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 230121
Practice locations
Addresses where Rachel A. Warby is enrolled with Medicare (CMS data updated October 2, 2026).
- 1 Genesys PkwyGrand Blanc, MI 48439 (810) 606‑5733
Group practices
Medicare enrollment lists Rachel A. Warby as a member of these groups (CMS data updated October 2, 2026).
- Observation Medicine Group PLLC31 clinicians in the group
- Emergency Medicine Physicians of Genesee County PLLC9 clinicians in the group
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in Grand Blanc
Clinicians with the same Medicare primary specialty in Grand Blanc, MI — not a recommendation.
Other clinicians in Observation Medicine Group PLLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Michigan State University College Of Osteopathic Medicine |
| Graduation year | 2010 (16 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1407173081 |
| 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