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NPISignal

Individual Healthcare Provider

Christopher Ratnasamy, MD

NPI Record: ActiveInternal Medicine — Interventional Cardiology
NPI1043411721
Grand Rapids, Michigan

Provider's NPPES record last updated: April 14, 2021

Overview

Entity Type
Individual Healthcare Provider
NPI
1043411721
Primary Specialty
Internal Medicine — Interventional Cardiology
Practice Location
Grand Rapids, Michigan
Sole Proprietor
No

Federal Screening

NPISignal checked this NPI against federal exclusion sources. Results below are based on the NPI number itself — an identifier match, not a name match.

List of Excluded Individuals/Entities (LEIE)

HHS Office of Inspector General

No potential match identified

No potential match was identified in NPISignal's indexed List of Excluded Individuals/Entities (LEIE) records as of 2026-09-10.

Source data
September 10, 2026
Records indexed
84,001
Screened
Sep 18, 2026, 3:56 PM UTC

This reflects only the records NPISignal currently holds and the identity information supplied. It is not a verification of eligibility, licensure, or compliance. Verify decisions that matter against the authoritative source.

SAM.gov Exclusions

U.S. General Services Administration

Not checked

SAM.gov Exclusions was not checked.

SAM.gov screening is not configured on this deployment. No SAM check has been performed.

Screened
Not checked

This is an NPI-based check only. NPISignal does not publish name-based exclusion matches on a provider profile. A shared or similar name is a lead that requires human review, not an identification, and this page is not the place to make one. Run a name-based screening below to see potential matches with the reasons for each.

This reflects only the records NPISignal currently holds and the identity information supplied. It is not a verification of eligibility, licensure, or compliance. Verify decisions that matter against the authoritative source.

Run a name-based screening

Searches OIG LEIE and SAM.gov by name and reviews every potential match.

Specialties & Taxonomies

  • Internal Medicine

    Interventional Cardiology

    Allopathic & Osteopathic Physicians

    Primary

    An area of medicine within the subspecialty of cardiology, which uses specialized imaging and other diagnostic techniques to evaluate blood flow and pressure in the coronary arteries and chambers of the heart and uses technical procedures and medications to treat abnormalities that impair the function of the cardiovascular system.

    Taxonomy code 207RI0011X
  • Internal Medicine

    Adult Congenital Heart Disease

    Allopathic & Osteopathic Physicians

    A physician who specializes in the care and treatment of adults with congenital heart disease. Adult congenital heart disease (ACHD) physicians are trained to understand the complexities of congenital heart disease, anatomy, physiology, surgical repairs, and long-term complications and use that to manage ACHD with acquired heart disease, including heart failure, arrhythmias, and pulmonary hypertension.

    Taxonomy code 207RA0002X
  • Pediatrics

    Pediatric Cardiology

    Allopathic & Osteopathic Physicians

    A pediatric cardiologist provides comprehensive care to patients with cardiovascular problems. This specialist is skilled in selecting, performing and evaluating the structural and functional assessment of the heart and blood vessels, and the clinical evaluation of cardiovascular disease.

    Taxonomy code 2080P0202X

Provider-Reported License Information

Internal Medicine (Michigan)
4301104221
Internal Medicine (Michigan)
4301104221
Pediatrics (Michigan)
4301104221
License numbers are reported by the provider to NPPES and are not independently verified by NPISignal against any state licensing board. Confirm current license status directly with the issuing state board.

Practice Locations

Practice Location

25 Michigan St Ne

Suite 4300

Grand Rapids, Michigan 49503

Phone: (616) 267-9150

Record Information

Enumeration Date
May 30, 2007
Provider's NPPES Record Last Updated
April 14, 2021
Certification Date
April 14, 2021
NPISignal NPPES Dataset
August 2026

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