Quick answers
- Does Yesenia Castellon accept Medicare assignment?
- Yes. Medicare's clinician data says Yesenia Castellon 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 Yesenia Castellon see?
- In 2024, CMS data shows 93 Original Medicare patients and 1,688 services for Yesenia Castellon. This counts Original Medicare only and measures volume, not quality.
- What is Yesenia Castellon's NPI number?
- 1184927741. 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 Yesenia Castellon, 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 | 93 |
|---|---|
| Services billed to Medicare | 1,688 |
| Different services or procedures | 90 |
| Participating Medicare provider | Yes |
| Average age of these patients | 70 |
Most frequent services
- Insertion of needle into vein for collection of blood sample (36415)264 services
- Blood test, comprehensive group of blood chemicals (80053)143 services
- Complete blood cell count (red cells, white blood cell, platelets), automated test (85027)122 services
- Blood test, clotting time (85610)116 services
- Telephone medical discussion with physician, 21-30 minutes (99443)111 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 cholesterol72%
- Diabetes56%
- Chronic kidney disease42%
- Arthritis37%
- Heart failure30%
Practice locations
Addresses where Yesenia Castellon is enrolled with Medicare (CMS data updated October 2, 2026).
- 335 E Ave ILancaster, CA 93535 (661) 471‑4232
Group practices
Medicare enrollment lists Yesenia Castellon as a member of this group (CMS data updated October 2, 2026).
- County of Los Angeles397 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Lancaster
Clinicians with the same Medicare primary specialty in Lancaster, CA — not a recommendation.
Other clinicians in County of Los Angeles
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2007 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1184927741 |
| 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
- 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