Quick answers
- Does Zavier S. Ahmed accept Medicare assignment?
- Yes. Medicare's clinician data says Zavier S. Ahmed 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 Zavier S. Ahmed see?
- In 2024, CMS data shows 743 Original Medicare patients and 6,928 services for Zavier S. Ahmed. This counts Original Medicare only and measures volume, not quality.
- What is Zavier S. Ahmed's NPI number?
- 1255677134. 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 Zavier S. Ahmed, 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 | 743 |
|---|---|
| Services billed to Medicare | 6,928 |
| Different services or procedures | 8 |
| Participating Medicare provider | Yes |
| Average age of these patients | 77 |
Most frequent services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)5,170 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)724 services
- Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)697 services
- Dialysis services, 4 or more physician visits per month (20 years or older) (90960)192 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)117 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%
- Chronic kidney disease75%
- Diabetes73%
- Heart failure71%
- Ischemic heart disease60%
Hospitals where Zavier S. Ahmed works
Medicare's Facility Affiliation Data lists Zavier S. Ahmed 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.
- Foothill Regional Medical CenterTustin, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: not listed by Medicare · CCN 050780
- Garden Grove Hospital & Medical CenterGarden Grove, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 050230
- Huntington Beach HospitalHuntington Beach, CA · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 050526
- Memorialcare Orange Coast Medical CenterFountain Valley, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050678
- UCI Health-OrangeOrange, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050348
Practice locations
Addresses where Zavier S. Ahmed is enrolled with Medicare (CMS data updated October 2, 2026).
- 11180 Warner Ave, Suite 463Fountain Valley, CA 92708 (714) 241‑9200
Group practices
Medicare enrollment lists Zavier S. Ahmed as a member of this group (CMS data updated October 2, 2026).
- Pacific Renal Care Medical Corp3 clinicians in the group
Specialties
- Nephrologyprimary
- Internal Medicinealso
Other nephrologists in Fountain Valley
Clinicians with the same Medicare primary specialty in Fountain Valley, CA — not a recommendation.
Other clinicians in Pacific Renal Care Medical Corp
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2012 (14 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) | 1255677134 |
| 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