Quick answers
- Does Raymond S. Nierva accept Medicare assignment?
- Yes. Medicare's clinician data says Raymond S. Nierva 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 S. Nierva see?
- In 2024, CMS data shows 1,071 Original Medicare patients and 1,336 services for Raymond S. Nierva. This counts Original Medicare only and measures volume, not quality.
- What is Raymond S. Nierva's NPI number?
- 1326179003. 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 S. Nierva, 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 | 1,071 |
|---|---|
| Services billed to Medicare | 1,336 |
| Different services or procedures | 5 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Anesthesia for lens surgery (00142)978 services
- Anesthesia for retinal surgery (00145)148 services
- Anesthesia for other procedure on eye (00140)105 services
- Anesthesia for procedure on eyelid (00103)87 services
- Anesthesia for procedure on eye for corneal transplant (00144)18 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 cholesterol75%
- High blood pressure68%
- Arthritis45%
- Ischemic heart disease27%
- Chronic kidney disease26%
- Diabetes25%
Practice locations
Addresses where Raymond S. Nierva is enrolled with Medicare (CMS data updated October 2, 2026).
- 9849 W Thunderbird BlvdSun City, AZ 85351 (623) 583‑4440
Group practices
Medicare enrollment lists Raymond S. Nierva as a member of this group (CMS data updated October 2, 2026).
- Ophthalmic Anesthesiology Consultants of Arizona PLLC7 clinicians in the group
Specialties
- Anesthesiologyprimary
Other anesthesiologists in Sun City
Clinicians with the same Medicare primary specialty in Sun City, AZ — not a recommendation.
Other clinicians in Ophthalmic Anesthesiology Consultants of Arizona PLLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1998 (28 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1326179003 |
| 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