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Hospitalist

Madeline M. Grondalski, MD

Works at hospitals in Saint Louis, MO · Creve Coeur, MO · Missouri

Summary

Dr. Madeline M. Grondalski, MD is a hospitalist at 1 Barnes Jew Hosp Plz, Saint Louis, MO 63110. Phone: (314) 747-3000. Accepts Medicare assignment. In 2024, Madeline M. Grondalski had 125 Original Medicare patients and 467 services. NPI 1225692536. 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.

From official Medicare data

This page shows what Medicare's official clinician data says about Madeline M. Grondalski, 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 Madeline M. Grondalski accept Medicare assignment?
Yes. Medicare's clinician data says Madeline M. Grondalski 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 Madeline M. Grondalski see?
In 2024, CMS data shows 125 Original Medicare patients and 467 services for Madeline M. Grondalski. This counts Original Medicare only and measures volume, not quality.
What is Madeline M. Grondalski's NPI number?
1225692536. 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 Madeline M. Grondalski, 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 patients125
Services billed to Medicare467
Different services or procedures9
Participating Medicare providerYes
Average age of these patients70

Most frequent services

  1. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)319 services
  2. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)61 services
  3. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)34 services
  4. Hospital discharge day management, more than 30 minutes (99239)30 services
  5. Prolonged hospital inpatient or observation care evaluation and management service(s) beyond the total time for the primary service (when the primary service has been selected using time on the date of the primary service); each additional 15 minutes by th (G0316)16 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%
  • Arthritis62%
  • Chronic kidney disease48%
  • Diabetes46%
  • Ischemic heart disease41%

Hospitals where Madeline M. Grondalski works

Medicare's Facility Affiliation Data lists Madeline M. Grondalski 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 Madeline M. Grondalski is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Madeline M. Grondalski as a member of this group (CMS data updated October 2, 2026).

  • Washington University3,029 clinicians in the group

Specialties

Find other Hospitalist doctors in Missouri →

Other hospitalists in Saint Louis

Clinicians with the same Medicare primary specialty in Saint Louis, MO — not a recommendation.

All hospitalists in Saint Louis →

Other clinicians in Washington University

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

Clinician information

CredentialMD
Medical schoolUniversity Of Missouri, Columbia School Of Medicine
Graduation year2019 (7 years since medical school)
Gender (as listed)Female
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1225692536
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