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Cardiovascular Disease (Cardiology)

Katherine J. Ludington, MD

Works at hospitals in Encinitas, CA · California

Summary

Dr. Katherine J. Ludington, MD is a cardiologist at 3231 Waring Ct, Oceanside, CA 92056. Phone: (760) 753-0220. Accepts Medicare assignment. In 2024, Katherine J. Ludington had 864 Original Medicare patients and 13,461 services. NPI 1164420469. 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: Cardiologist (Medicare lists Cardiovascular Disease (Cardiology))
  • Address: 3231 Waring Ct, Oceanside, CA 92056 · Directions (1 more location)
  • Phone: (760) 753‑0220
  • Medicare: Accepts Medicare assignment
  • Hospital: Scripps Memorial Hospital - Encinitas
  • Group practice: North Coast Cardiology Inc
  • Medical school: University Of California, San Francisco School Of Medicine · graduated 1997 (29 years since medical school)
  • Gender (as listed): Female
  • Telehealth: offered

From official Medicare data

This page shows what Medicare's official clinician data says about Katherine J. Ludington, 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 Katherine J. Ludington accept Medicare assignment?
Yes. Medicare's clinician data says Katherine J. Ludington 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 Katherine J. Ludington see?
In 2024, CMS data shows 864 Original Medicare patients and 13,461 services for Katherine J. Ludington. This counts Original Medicare only and measures volume, not quality.
What is Katherine J. Ludington's NPI number?
1164420469. 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 Katherine J. Ludington, 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 patients864
Services billed to Medicare13,461
Different services or procedures49
Participating Medicare providerYes
Average age of these patients76

Most frequent services

  1. Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)2,626 services
  2. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)2,025 services
  3. Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)1,268 services
  4. Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)1,164 services
  5. Evaluation of cardiac rhythm monitor system, remote up to 30 days (93298)1,096 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%
  • Arthritis49%
  • Ischemic heart disease36%
  • Atrial fibrillation33%
  • Heart failure27%

Hospitals where Katherine J. Ludington works

Medicare's Facility Affiliation Data lists Katherine J. Ludington 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 Katherine J. Ludington is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Katherine J. Ludington as a member of this group (CMS data updated October 2, 2026).

  • North Coast Cardiology Inc2 clinicians in the group

Specialties

Find other Cardiovascular Disease (Cardiology) doctors in California →

Other cardiologists in Oceanside

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

All cardiologists in Oceanside →

Other clinicians in North Coast Cardiology Inc

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

Clinician information

CredentialMD
Medical schoolUniversity Of California, San Francisco School Of Medicine
Graduation year1997 (29 years since medical school)
Gender (as listed)Female
Medicare assignmentAccepts (Medicare-approved amount as full payment)
TelehealthOffers telehealth services
NPI (National Provider Identifier)1164420469
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