Quick answers
- Does Joanne L. Alonzo accept Medicare assignment?
- Yes. Medicare's clinician data says Joanne L. Alonzo 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 Joanne L. Alonzo see?
- In 2024, CMS data shows 2,892 Original Medicare patients and 6,597 services for Joanne L. Alonzo. This counts Original Medicare only and measures volume, not quality.
- What is Joanne L. Alonzo's NPI number?
- 1124349246. 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 Joanne L. Alonzo, 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 | 2,892 |
|---|---|
| Services billed to Medicare | 6,597 |
| Different services or procedures | 53 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)2,521 services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)771 services
- Ultrasound of heart with color-depicted blood flow, rate, direction and valve function (93306)755 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)585 services
- Nuclear medicine studies of heart muscle at rest and with stress and spect (78452)269 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%
- Arthritis42%
- Ischemic heart disease38%
- Diabetes35%
- Atrial fibrillation35%
Hospitals where Joanne L. Alonzo works
Medicare's Facility Affiliation Data lists Joanne L. Alonzo 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 ClearlakeClearlake, CA · Critical Access Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 051317
- Enloe HealthChico, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050039
- Orchard HospitalGridley, CA · Critical Access Hospital · Emergency services: listed by Medicare · CCN 051311
- Oroville HospitalOroville, CA · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 050030
- St Elizabeth Community HospitalRed Bluff, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: not listed by Medicare · CCN 050042
Practice locations
Addresses where Joanne L. Alonzo is enrolled with Medicare (CMS data updated October 2, 2026).
- 1531 EsplanadeChico, CA 95926 (530) 332‑5557
Group practices
Medicare enrollment lists Joanne L. Alonzo as a member of this group (CMS data updated October 2, 2026).
- Enloe Medical Center333 clinicians in the group
Specialties
Find other Cardiovascular Disease (Cardiology) doctors in California →
Other cardiologists in Chico
Clinicians with the same Medicare primary specialty in Chico, CA — not a recommendation.
Other clinicians in Enloe Medical Center
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Kansas City University Of Physicians And Surgeons |
| Graduation year | 2010 (16 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1124349246 |
| 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