Quick answers
- Does Raymond J. Esparza accept Medicare assignment?
- Yes. Medicare's clinician data says Raymond J. Esparza 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 Raymond J. Esparza see?
- In 2024, CMS data shows 131 Original Medicare patients and 425 services for Raymond J. Esparza. This counts Original Medicare only and measures volume, not quality.
- What is Raymond J. Esparza's NPI number?
- 1497717391. 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 Raymond J. Esparza, 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 | 131 |
|---|---|
| Services billed to Medicare | 425 |
| Different services or procedures | 20 |
| Participating Medicare provider | Yes |
| Average age of these patients | 77 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)143 services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)67 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)42 services
- Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)26 services
- Influenza vaccine, trivalent, 0.5 ml dosage (90658)19 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%
- Diabetes48%
- Arthritis47%
- Chronic kidney disease28%
- Ischemic heart disease24%
Hospitals where Raymond J. Esparza works
Medicare's Facility Affiliation Data lists Raymond J. Esparza 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.
- Casa Colina HospitalPomona, CA · Acute Care Hospital · Emergency services: not listed by Medicare · CCN 050782
- Emanate Health Foothill Presbyterian HospitalGlendora, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: not listed by Medicare · CCN 050597
Practice locations
Addresses where Raymond J. Esparza is enrolled with Medicare (CMS data updated October 2, 2026).
- 1330 W Covina Blvd, Suite 203San Dimas, CA 91773 (909) 394‑0044
Specialties
- Internal Medicineprimary
- Pediatric Medicinealso
Other internal medicine doctors in San Dimas
Clinicians with the same Medicare primary specialty in San Dimas, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of California, San Diego School Of Medicine |
| Graduation year | 1992 (34 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1497717391 |
| 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