Quick answers
- Does Stephanie Agoncillo accept Medicare assignment?
- Yes. Medicare's clinician data says Stephanie Agoncillo 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 Stephanie Agoncillo see?
- In 2024, CMS data shows 71 Original Medicare patients and 95 services for Stephanie Agoncillo. This counts Original Medicare only and measures volume, not quality.
- What is Stephanie Agoncillo's NPI number?
- 1427425172. 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 Stephanie Agoncillo, 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 | 71 |
|---|---|
| Services billed to Medicare | 95 |
| Different services or procedures | 38 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Repair of groin hernia using an endoscope (49650)11 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 pressure69%
- High cholesterol68%
- Arthritis41%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)35%
- Anxiety23%
- Osteoporosis23%
Hospitals where Stephanie Agoncillo works
Medicare's Facility Affiliation Data lists Stephanie Agoncillo 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.
- Dominican HospitalSanta Cruz, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050242
- Sutter Maternity & Surgery Center of Santa CruzSanta Cruz, CA · Acute Care Hospital · Emergency services: not listed by Medicare · CCN 050714
Practice locations
Addresses where Stephanie Agoncillo is enrolled with Medicare (CMS data updated October 2, 2026).
- 2900 Chanticleer AveSanta Cruz, CA 95065
- 2907 Chanticleer AveSanta Cruz, CA 95065 (831) 477‑2375
- 2911 Chanticleer AveSanta Cruz, CA 95065 (831) 477‑2350
- 2915 Chanticleer AveSanta Cruz, CA 95065 (831) 477‑2375
- 550 S Green Valley RdWatsonville, CA 95076 (831) 458‑5865
Group practices
Medicare enrollment lists Stephanie Agoncillo as a member of this group (CMS data updated October 2, 2026).
- Sutter Bay Medical Foundation3,829 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Santa Cruz
Clinicians with the same Medicare primary specialty in Santa Cruz, CA — not a recommendation.
Other clinicians in Sutter Bay Medical Foundation
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Graduation year | 2015 |
|---|---|
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1427425172 |
| 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