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Neurology

Ramon N. Guadiz, MD

Works at hospitals in Norwalk, CA · Lynwood, CA · California

Summary

Dr. Ramon N. Guadiz, MD is a neurologist at 3625 Martin Luther King Jr Blvd, Suite 2, Lynwood, CA 90262. Phone: (310) 638-0533. Accepts Medicare assignment. In 2024, Ramon N. Guadiz had 149 Original Medicare patients and 698 services. NPI 1003998147. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

  • Specialty: Neurologist (Medicare lists Neurology)
  • Address: 3625 Martin Luther King Jr Blvd, Suite 2, Lynwood, CA 90262 · Directions
  • Phone: (310) 638‑0533
  • Medicare: Accepts Medicare assignment
  • Hospitals: Coast Plaza Hospital, Saint Francis Medical Center
  • Group practice: Renal Medical Associates
  • Medical school: graduated 1987 (39 years since medical school)
  • Gender (as listed): Male

From official Medicare data

This page shows what Medicare's official clinician data says about Ramon N. Guadiz, joined by NPI number (data updated October 2, 2026). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

Quick answers

Does Ramon N. Guadiz accept Medicare assignment?
Yes. Medicare's clinician data says Ramon N. Guadiz 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 Ramon N. Guadiz see?
In 2024, CMS data shows 149 Original Medicare patients and 698 services for Ramon N. Guadiz. This counts Original Medicare only and measures volume, not quality.
What is Ramon N. Guadiz's NPI number?
1003998147. 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 Ramon N. Guadiz, 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 patients149
Services billed to Medicare698
Different services or procedures16
Participating Medicare providerYes
Average age of these patients68

Most frequent services

  1. Dialysis services, 4 or more physician visits per month (20 years or older) (90960)157 services
  2. Dialysis services, 2-3 physician visits per month (20 years or older) (90961)128 services
  3. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)119 services
  4. Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes (99231)64 services
  5. Hemodialysis procedure with physician evaluation (90935)62 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%
  • Diabetes72%
  • Heart failure56%
  • Arthritis44%

Hospitals where Ramon N. Guadiz works

Medicare's Facility Affiliation Data lists Ramon N. Guadiz 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.

  • Coast Plaza HospitalNorwalk, CA · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 050771
  • Saint Francis Medical CenterLynwood, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: not listed by Medicare · CCN 050104

Practice locations

Addresses where Ramon N. Guadiz is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Ramon N. Guadiz as a member of this group (CMS data updated October 2, 2026).

  • Renal Medical Associates3 clinicians in the group

Specialties

Find other Neurology doctors in California →

Other neurologists in California

Clinicians with the same Medicare primary specialty in California — not a recommendation.

All neurologists in California →

Other clinicians in Renal Medical Associates

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

Clinician information

CredentialMD
Graduation year1987 (39 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1003998147
CorrectionsReport 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

  1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
  2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
  3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
  4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
  5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  6. Medicare Care Compare — official Medicare tool to look up clinicians