Quick answers
- Does Isabella S. Allegrezza accept Medicare assignment?
- Yes. Medicare's clinician data says Isabella S. Allegrezza 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 Isabella S. Allegrezza see?
- In 2024, CMS data shows 179 Original Medicare patients and 460 services for Isabella S. Allegrezza. This counts Original Medicare only and measures volume, not quality.
- What is Isabella S. Allegrezza's NPI number?
- 1063009280. 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 Isabella S. Allegrezza, 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 | 179 |
|---|---|
| Services billed to Medicare | 460 |
| Different services or procedures | 54 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
Most frequent services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)88 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)69 services
- Detection test by immunoassay with direct visual observation for severe acute respiratory syndrome coronavirus 2 (covid-19) (87811)26 services
- Automated urinalysis test (81003)23 services
- Amplifed dna or rna probe detection of severe acute respiratory syndrome coronavirus 2 (covid-19) antigen (87635)15 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 cholesterol61%
- High blood pressure47%
- Arthritis36%
- Anxiety28%
- Ischemic heart disease23%
- Osteoporosis23%
Practice locations
Addresses where Isabella S. Allegrezza is enrolled with Medicare (CMS data updated October 2, 2026).
- 630 Main St, Unit DFrederick, CO 80530 (303) 709‑5675
Group practices
Medicare enrollment lists Isabella S. Allegrezza as a member of this group (CMS data updated October 2, 2026).
- Rainer Linnemeyer PLLC4 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Colorado
Clinicians with the same Medicare primary specialty in Colorado — not a recommendation.
Other clinicians in Rainer Linnemeyer PLLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2020 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1063009280 |
| 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
- 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