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Interventional Cardiology

Rainier A. Manzanilla, MD

Works at hospitals in Los Angeles, CA · California

Summary

Dr. Rainier A. Manzanilla, MD is an interventional cardiologist at 1701 E Cesar E Chavez Ave, Suite 125, Los Angeles, CA 90033. Phone: (323) 987-8787. May accept Medicare assignment. In 2024, Rainier A. Manzanilla had 135 Original Medicare patients and 458 services. NPI 1316026974. 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: Interventional cardiologist (Medicare lists Interventional Cardiology)
  • Address: 1701 E Cesar E Chavez Ave, Suite 125, Los Angeles, CA 90033 · Directions
  • Phone: (323) 987‑8787
  • Medicare: May accept Medicare assignment
  • Hospital: Adventist Health White Memorial
  • Group practice: East Los Angeles Cardiology Medical Group Inc
  • Medical school: University Of California, Irvine, California College Of Medicine · graduated 1986 (40 years since medical school)
  • Gender (as listed): Male

From official Medicare data

This page shows what Medicare's official clinician data says about Rainier A. Manzanilla, 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 Rainier A. Manzanilla accept Medicare assignment?
Medicare's clinician data says Rainier A. Manzanilla may accept Medicare assignment (as of October 2, 2026). Ask the office whether they accept it for your visit.
How many Medicare patients does Rainier A. Manzanilla see?
In 2024, CMS data shows 135 Original Medicare patients and 458 services for Rainier A. Manzanilla. This counts Original Medicare only and measures volume, not quality.
What is Rainier A. Manzanilla's NPI number?
1316026974. 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 Rainier A. Manzanilla, 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 patients135
Services billed to Medicare458
Different services or procedures10
Participating Medicare providerYes
Average age of these patients76

Most frequent services

  1. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)330 services
  2. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)52 services
  3. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)31 services
  4. Critical care, first 30-74 minutes (99291)20 services
  5. Ultrasound of heart with color-depicted blood flow, rate, direction and valve function (93306)13 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%
  • Diabetes75%
  • Heart failure75%
  • Ischemic heart disease72%
  • Chronic kidney disease70%

Hospitals where Rainier A. Manzanilla works

Medicare's Facility Affiliation Data lists Rainier A. Manzanilla 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.

Practice locations

Addresses where Rainier A. Manzanilla is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Rainier A. Manzanilla as a member of this group (CMS data updated October 2, 2026).

  • East Los Angeles Cardiology Medical Group Inc3 clinicians in the group

Specialties

Find other Interventional Cardiology doctors in California →

Other interventional cardiologists in Los Angeles

Clinicians with the same Medicare primary specialty in Los Angeles, CA — not a recommendation.

All interventional cardiologists in Los Angeles →

Other clinicians in East Los Angeles Cardiology Medical Group Inc

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

Clinician information

CredentialMD
Medical schoolUniversity Of California, Irvine, California College Of Medicine
Graduation year1986 (40 years since medical school)
Gender (as listed)Male
Medicare assignmentMay accept for some services
NPI (National Provider Identifier)1316026974
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