Quick answers
- Does Megan P. Griesman accept Medicare assignment?
- Yes. Medicare's clinician data says Megan P. Griesman 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 Megan P. Griesman see?
- In 2024, CMS data shows 67 Original Medicare patients and 102 services for Megan P. Griesman. This counts Original Medicare only and measures volume, not quality.
- What is Megan P. Griesman's NPI number?
- 1710603121. 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 Megan P. Griesman, 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 | 67 |
|---|---|
| Services billed to Medicare | 102 |
| Different services or procedures | 19 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
Most frequent services
- Emergency department visit with low level of medical decision making (99283)17 services
- Emergency department visit with moderate level of medical decision making (99284)16 services
- New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)14 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)13 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%
- Anxiety39%
- Diabetes31%
- Depression31%
Hospitals where Megan P. Griesman works
Medicare's Facility Affiliation Data lists Megan P. Griesman 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.
- Javon Bea HospitalRockford, IL · Acute Care Hospital · closed, according to its website · CCN 140239
- Mercyhealth Hospital & Physician Clinic-Crystal LACrystal Lake, IL · Acute Care Hospital · Emergency services: listed by Medicare · CCN 140308
- Saint Anthony Medical CenterRockford, IL · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 140233
Practice locations
Addresses where Megan P. Griesman is enrolled with Medicare (CMS data updated October 2, 2026).
- 5000 Prairie Rose DrRoscoe, IL 61073 (815) 971‑2000
- 8201 E Riverside BlvdRockford, IL 61114 (815) 971‑2000
- 875 S Route 31Crystal Lake, IL 60014 (779) 220‑5500
- 9951 Rock Cut Xing, Suite 200300Loves Park, IL 61111 (815) 639‑8500
Group practices
Medicare enrollment lists Megan P. Griesman as a member of these groups (CMS data updated October 2, 2026).
- Mercy Health System Corporation753 clinicians in the group
- Rockford Health Physicians521 clinicians in the group
- Saint Anthony Medical Center44 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Roscoe
Clinicians with the same Medicare primary specialty in Roscoe, IL — not a recommendation.
Other clinicians in Mercy Health System Corporation
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Graduation year | 2022 |
|---|---|
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1710603121 |
| 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