Quick answers
- Does Calixto Zaldivar accept Medicare assignment?
- Yes. Medicare's clinician data says Calixto Zaldivar 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 Calixto Zaldivar see?
- In 2024, CMS data shows 1,559 Original Medicare patients and 4,149 services for Calixto Zaldivar. This counts Original Medicare only and measures volume, not quality.
- What is Calixto Zaldivar's NPI number?
- 1972658292. 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 Calixto Zaldivar, 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 | 1,559 |
|---|---|
| Services billed to Medicare | 4,149 |
| Different services or procedures | 20 |
| Participating Medicare provider | Yes |
| Average age of these patients | 77 |
Most frequent services
- Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)1,598 services
- Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes (99309)755 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)673 services
- Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more (99308)419 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)356 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%
- Arthritis66%
- Ischemic heart disease61%
- Heart failure53%
- Diabetes52%
Hospitals where Calixto Zaldivar works
Medicare's Facility Affiliation Data lists Calixto Zaldivar 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.
- HCA Florida Lake City HospitalLake City, FL · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 100156
- HCA Florida North Florida HospitalGainesville, FL · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 100204
- HCA Florida Putnam HospitalPalatka, FL · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 100232
- Lake Butler HospitalLake Butler, FL · Critical Access Hospital · Emergency services: listed by Medicare · CCN 101303
- UF Health Shands HospitalGainesville, FL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 100113
Practice locations
Addresses where Calixto Zaldivar is enrolled with Medicare (CMS data updated October 2, 2026).
- 6500 W Newberry RdGainesville, FL 32605 (352) 384‑3900
Group practices
Medicare enrollment lists Calixto Zaldivar as a member of this group (CMS data updated October 2, 2026).
- Hospital Internal Medicine PA43 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Gainesville
Clinicians with the same Medicare primary specialty in Gainesville, FL — not a recommendation.
Other clinicians in Hospital Internal Medicine PA
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1994 (32 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1972658292 |
| 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