Quick answers
- Does Stephen P. Fernau accept Medicare assignment?
- Yes. Medicare's clinician data says Stephen P. Fernau 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 Stephen P. Fernau see?
- In 2024, CMS data shows 158 Original Medicare patients and 160 services for Stephen P. Fernau. This counts Original Medicare only and measures volume, not quality.
- What is Stephen P. Fernau's NPI number?
- 1851343123. 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 Stephen P. Fernau, 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 | 158 |
|---|---|
| Services billed to Medicare | 160 |
| Different services or procedures | 55 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Anesthesia for lens surgery (00142)25 services
- Anesthesia for other procedure on large bowel using an endoscope (00811)16 services
- Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)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%
- Arthritis58%
- Ischemic heart disease34%
- Chronic kidney disease33%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)32%
Hospitals where Stephen P. Fernau works
Medicare's Facility Affiliation Data lists Stephen P. Fernau 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.
- AdventHealth Castle RockCastle Rock, CO · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 060125
- AdventHealth ParkerParker, CO · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 060114
- Banner - University Medical Center Tucson CampusTucson, AZ · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 030064
- Sky Ridge Medical CenterLone Tree, CO · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 060112
Practice locations
Addresses where Stephen P. Fernau is enrolled with Medicare (CMS data updated October 2, 2026).
- 10101 Ridgegate PkwyLone Tree, CO 80124 (303) 438‑3999
- 1625 N Campbell AveTucson, AZ 85719 (520) 694‑0111
- 2800 E Ajo WayTucson, AZ 85713 (520) 874‑2000
Group practices
Medicare enrollment lists Stephen P. Fernau as a member of these groups (CMS data updated October 2, 2026).
- Banner-University Medical Group1,072 clinicians in the group
- US Anesthesia Partners of Colorado Inc461 clinicians in the group
Specialties
Find other clinicians: Certified Registered Nurse Anesthetist (CRNA), Colorado →
Other nurse anesthetists in Lone Tree
Clinicians with the same Medicare primary specialty in Lone Tree, CO — not a recommendation.
Other clinicians in Banner-University Medical Group
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | CNA |
|---|---|
| Graduation year | 2002 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1851343123 |
| 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