Quick answers
- Does Kelsey I. Callahan accept Medicare assignment?
- Yes. Medicare's clinician data says Kelsey I. Callahan 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 Kelsey I. Callahan see?
- In 2024, CMS data shows 706 Original Medicare patients and 930 services for Kelsey I. Callahan. This counts Original Medicare only and measures volume, not quality.
- What is Kelsey I. Callahan's NPI number?
- 1770288532. 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 Kelsey I. Callahan, 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 | 706 |
|---|---|
| Services billed to Medicare | 930 |
| Different services or procedures | 52 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Emergency department visit with moderate level of medical decision making (99284)227 services
- Emergency department visit with high level of medical decision making (99285)201 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)149 services
- Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)62 services
- Emergency department visit with low level of medical decision making (99283)55 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 pressure71%
- High cholesterol69%
- Arthritis48%
- Anxiety29%
- Diabetes25%
- Depression24%
Hospitals where Kelsey I. Callahan works
Medicare's Facility Affiliation Data lists Kelsey I. Callahan 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.
- Adventist Health SonoraSonora, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: not listed by Medicare · CCN 050335
Practice locations
Addresses where Kelsey I. Callahan is enrolled with Medicare (CMS data updated October 2, 2026).
- 13949 Mono WaySonora, CA 95370 (209) 533‑5371
- 14540 Mono WaySonora, CA 95370 (209) 536‑6680
- 23 N Main St, Suite 101Angels Camp, CA 95222 (209) 736‑9130
- 729 Pauline CourtSonora, CA 95370 (209) 588‑8068
Group practices
Medicare enrollment lists Kelsey I. Callahan as a member of these groups (CMS data updated October 2, 2026).
- Adventist Health Physicians Network628 clinicians in the group
- Sierra Orthopedic Institute Medical Corporation3 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Sonora
Clinicians with the same Medicare primary specialty in Sonora, CA — not a recommendation.
Other clinicians in Adventist Health Physicians Network
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2022 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1770288532 |
| 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