Quick answers
- Does Ann Marie Ocallaghan accept Medicare assignment?
- Yes. Medicare's clinician data says Ann Marie Ocallaghan 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 Ann Marie Ocallaghan see?
- In 2024, CMS data shows 59 Original Medicare patients and 60 services for Ann Marie Ocallaghan. This counts Original Medicare only and measures volume, not quality.
- What is Ann Marie Ocallaghan's NPI number?
- 1588850176. 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 Ann Marie Ocallaghan, 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 | 59 |
|---|---|
| Services billed to Medicare | 60 |
| Different services or procedures | 18 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
Most frequent services
- Anesthesia for other procedure on large bowel using an endoscope (00811)20 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%
- Arthritis44%
- Ischemic heart disease29%
- Diabetes24%
- Depression24%
Hospitals where Ann Marie Ocallaghan works
Medicare's Facility Affiliation Data lists Ann Marie Ocallaghan 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.
- Animas Surgical Hospital, LLCDurango, CO · Acute Care Hospital · Emergency services: listed by Medicare · CCN 060117
- Mercy Regional Medical CenterDurango, CO · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 060013
- Southwest Memorial HospitalCortez, CO · Critical Access Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 061327
Practice locations
Addresses where Ann Marie Ocallaghan is enrolled with Medicare (CMS data updated October 2, 2026).
- 1266 Escalante Dr, 101 Animas Surgical Center at EscalanteDurango, CO 81303 (970) 828‑0220
- 1311 N Mildred RdCortez, CO 81321 (800) 475‑6236
- 575 Rivergate LnDurango, CO 81301 (970) 247‑3537
Group practices
Medicare enrollment lists Ann Marie Ocallaghan as a member of these groups (CMS data updated October 2, 2026).
- Animas Surgical Hospital LLC57 clinicians in the group
- Novus Colorado Professional Corporation12 clinicians in the group
Specialties
Find other clinicians: Certified Registered Nurse Anesthetist (CRNA), Colorado →
Other nurse anesthetists in Durango
Clinicians with the same Medicare primary specialty in Durango, CO — not a recommendation.
Other clinicians in Animas Surgical Hospital LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | CNA |
|---|---|
| Graduation year | 2007 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1588850176 |
| 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