Quick answers
- Does Josiah M. Horneman accept Medicare assignment?
- Yes. Medicare's clinician data says Josiah M. Horneman 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 Josiah M. Horneman see?
- In 2024, CMS data shows 56 Original Medicare patients and 75 services for Josiah M. Horneman. This counts Original Medicare only and measures volume, not quality.
- What is Josiah M. Horneman's NPI number?
- 1174909477. 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 Josiah M. Horneman, 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 | 56 |
|---|---|
| Services billed to Medicare | 75 |
| Different services or procedures | 6 |
| Participating Medicare provider | Yes |
| Average age of these patients | 69 |
Most frequent services
- Emergency department visit with low level of medical decision making (99283)47 services
- Emergency department visit with straightforward medical decision making (99282)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 pressure73%
- High cholesterol55%
- Diabetes46%
- Chronic kidney disease43%
- Arthritis27%
- Ischemic heart disease27%
Hospitals where Josiah M. Horneman works
Medicare's Facility Affiliation Data lists Josiah M. Horneman 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.
- Sage Memorial HospitalGanado, AZ · Critical Access Hospital · Emergency services: not listed by Medicare · CCN 031309
Practice locations
Addresses where Josiah M. Horneman is enrolled with Medicare (CMS data updated October 2, 2026).
- PO Box, Suite 457Ganado, AZ 86505
Specialties
- Physician Assistantprimary
Other physician assistants in Arizona
Clinicians with the same Medicare primary specialty in Arizona — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2015 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1174909477 |
| 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