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Cardiovascular Disease (Cardiology)

Mark L. Niemiera, MD

Works at hospitals in Holmdel, NJ · Edison, NJ · Perth Amboy, NJ … · New Jersey

Summary

Dr. Mark L. Niemiera, MD is a cardiologist at 26 Throckmorton Ln, Old Bridge, NJ 08857. Phone: (732) 679-9950. May accept Medicare assignment. In 2024, Mark L. Niemiera had 901 Original Medicare patients and 2,192 services. NPI 1780788109. 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: 26 Throckmorton Ln, Old Bridge, NJ 08857 · Directions (3 more locations)
  • Phone: (732) 679‑9950
  • Medicare: May accept Medicare assignment
  • Hospitals: Bayshore Medical Center, JFK University Medical Center, Raritan Bay Medical Center and 1 more
  • Group practice: Hackensack Meridian Health Medical Group - Primary Care PC (+1 more)
  • Medical school: Hahnemann University 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 Mark L. Niemiera, 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 Mark L. Niemiera accept Medicare assignment?
Medicare's clinician data says Mark L. Niemiera may accept Medicare assignment (as of October 2, 2026). Ask the office whether they accept it for your visit.
How many Medicare patients does Mark L. Niemiera see?
In 2024, CMS data shows 901 Original Medicare patients and 2,192 services for Mark L. Niemiera. This counts Original Medicare only and measures volume, not quality.
What is Mark L. Niemiera's NPI number?
1780788109. 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 Mark L. Niemiera, 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 patients901
Services billed to Medicare2,192
Different services or procedures35
Participating Medicare providerYes
Average age of these patients76

Most frequent services

  1. Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)767 services
  2. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)542 services
  3. Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)295 services
  4. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)174 services
  5. Ultrasound of heart with color-depicted blood flow, rate, direction and valve function (93306)73 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%
  • Arthritis57%
  • Diabetes47%
  • Ischemic heart disease46%
  • Heart failure38%

Hospitals where Mark L. Niemiera works

Medicare's Facility Affiliation Data lists Mark L. Niemiera 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.

  • Bayshore Medical CenterHolmdel, NJ · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 310112
  • JFK University Medical CenterEdison, NJ · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 310108
  • Raritan Bay Medical CenterPerth Amboy, NJ · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 310039
  • Southern Ocean Medical CenterManahawkin, NJ · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 310113

Practice locations

Addresses where Mark L. Niemiera is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Mark L. Niemiera as a member of these groups (CMS data updated October 2, 2026).

  • Hackensack Meridian Health Medical Group - Primary Care PC358 clinicians in the group
  • RB Cardiology Reading Associates LLC7 clinicians in the group

Specialties

Find other Cardiovascular Disease (Cardiology) doctors in New Jersey →

Other cardiologists in Old Bridge

Clinicians with the same Medicare primary specialty in Old Bridge, NJ — not a recommendation.

All cardiologists in Old Bridge →

Other clinicians in Hackensack Meridian Health Medical Group - Primary Care PC

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

Clinician information

CredentialMD
Medical schoolHahnemann University College Of Medicine
Graduation year1986 (40 years since medical school)
Gender (as listed)Male
Medicare assignmentMay accept for some services
NPI (National Provider Identifier)1780788109
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