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Internal Medicine

Maria Y. Mazing, MD

Works at hospitals in Bronx, NY · New York

Summary

Dr. Maria Y. Mazing, MD is an internal medicine doctor at 111 E 210th St, Bronx, NY 10467. May accept Medicare assignment. In 2024, Maria Y. Mazing had 64 Original Medicare patients and 301 services. NPI 1598877276. 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: Internal medicine doctor (Medicare lists Internal Medicine)
  • Address: 111 E 210th St, Bronx, NY 10467 · Directions
  • Medicare: May accept Medicare assignment
  • Hospital: Montefiore Medical Center
  • Group practice: Montefiore Medical Center
  • Medical school: graduated 1996 (30 years since medical school)
  • Gender (as listed): Female

From official Medicare data

This page shows what Medicare's official clinician data says about Maria Y. Mazing, 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 Maria Y. Mazing accept Medicare assignment?
Medicare's clinician data says Maria Y. Mazing may accept Medicare assignment (as of October 2, 2026). Ask the office whether they accept it for your visit.
How many Medicare patients does Maria Y. Mazing see?
In 2024, CMS data shows 64 Original Medicare patients and 301 services for Maria Y. Mazing. This counts Original Medicare only and measures volume, not quality.
What is Maria Y. Mazing's NPI number?
1598877276. 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 Maria Y. Mazing, 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 patients64
Services billed to Medicare301
Different services or procedures10
Participating Medicare providerYes
Average age of these patients71

Most frequent services

  1. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)164 services
  2. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)46 services
  3. Hospital discharge day management, more than 30 minutes (99239)30 services
  4. 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)29 services
  5. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)19 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%
  • Diabetes73%
  • Heart failure61%
  • Arthritis56%
  • Chronic kidney disease56%

Hospitals where Maria Y. Mazing works

Medicare's Facility Affiliation Data lists Maria Y. Mazing 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 Maria Y. Mazing is enrolled with Medicare (CMS data updated October 2, 2026).

  • 111 E 210th StBronx, NY 10467

Group practices

Medicare enrollment lists Maria Y. Mazing as a member of this group (CMS data updated October 2, 2026).

  • Montefiore Medical Center2,820 clinicians in the group

Specialties

Find other Internal Medicine doctors in New York →

Other internal medicine doctors in Bronx

Clinicians with the same Medicare primary specialty in Bronx, NY — not a recommendation.

All internal medicine doctors in Bronx →

Other clinicians in Montefiore Medical Center

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

Clinician information

CredentialMD
Graduation year1996 (30 years since medical school)
Gender (as listed)Female
Medicare assignmentMay accept for some services
NPI (National Provider Identifier)1598877276
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