Karen Mrejen, MD
Pulmonary Disease Internal Medicine
Karen Mrejen is a Pulmonary Disease Internal Medicine specialist based in Rockville Centre, NY with over 31 years of clinical experience. Medicare-enrolled per CMS records and offers virtual telehealth visits.
Also practices: CRITICAL CARE (INTENSIVISTS), INTERNAL MEDICINE
Karen Mrejen, MD has been part of the Rockville Centre medical community since 2006 in group practice. Trained at Albany Medical College of Union University (class of 1995), she has been practicing for over 31 years. Among her Medicare patients, common conditions include hypertension, high cholesterol, and COPD (per CMS data). CMS MIPS quality score: 91.25/100 (2023).
At a glance
- Federal MIPS score higher than 50% of MIPS-scored doctors in New York
- Virtual visits available — no app or travel required
Older · 4574dNPPES updated 2013-11-14 · verify NPI on CMS · Verify license at New York State Board for Medicine
Contact & Location
Practice Location
200 N Village Ave Suite 300, Rockville Centre, NY 11570-2341
How Does This Doctor Compare?
Based on Medicare data, this doctor has an average quality score compared to other doctors in New York.
MIPS Score
202391.25/100
New York avg: 87 · US avg: 83.6
✓ Higher than most doctors nationally(+7.7 pts)
Average range among MIPS-scored doctors in New YorkHow the government rates this doctor's Medicare care quality. Scores above 75 are considered good.
Medicare Patients
439
Unique beneficiaries
Standard volumePrescription Recipients
457
Patients prescribed
Prescriptions Written
2,307
Total claims
Total Medicare drug cost: $725k
Percentile rankings compared against 8,064 reporting peers in New York.
Data Note: Sourced from CMS Medicare Provider Utilization & Payment Data. Percentile rankings compare this provider against all peers with reported data in the same state. Updated annually to reflect the latest federal reporting cycle.
What This Doctor Treats Most
Based on Medicare claims data — here's what patients commonly see this doctor for
Based on Medicare data, this doctor primarily manages Hypertension, High Cholesterol, and COPD.
High blood pressure — a leading risk factor for heart disease and stroke
US avg: 70.2%↑ More patients than average (+5%) — a focus area for this doctor
Elevated cholesterol or triglycerides that increase heart disease risk
US avg: 70.4%↑ More patients than average (+5%) — a focus area for this doctor
Chronic Obstructive Pulmonary Disease — a group of lung diseases that block airflow
US avg: 20.4%↑ More patients than average (+40%) — a focus area for this doctor
Joint inflammation causing pain, swelling, and stiffness
US avg: 49.3%↑ More patients than average (+11%) — a focus area for this doctor
Reduced blood flow to the heart muscle, commonly known as coronary artery disease
US avg: 31.7%↑ More patients than average (+22%) — a focus area for this doctor
A condition where the body cannot properly regulate blood sugar levels
US avg: 34.5%↑ More patients than average (+6%) — a focus area for this doctor
Excessive worry or fear that interferes with daily life
US avg: 34.1%↑ More patients than average (+2%) — a focus area for this doctor
A condition causing airway inflammation, wheezing, and difficulty breathing
US avg: 13.3%↑ More patients than average (+19%) — a focus area for this doctor
Percentage of this provider's Medicare patients diagnosed with each condition. Source: CMS Utilization Data.
$213 received from industry
5 transactions reported in 2018 ·Low tier
Payments include consulting fees, speaking honoraria, food & beverage, travel, research support, and ownership interests from drug and medical device manufacturers. Disclosure is required by the federal Physician Payments Sunshine Act. These payments do not necessarily indicate conflicts of interest. National median: $338 across 136 000 tracked providers.
Tiers — Low: under $500 · Moderate: $500-5 000 · High: $5 000-25 000 · Very High: $25 000+. Source: CMS Open Payments 2018, attributed to Karen Mrejen's NPI.
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Background & Specialty
Education, training, and specialty classification from CMS NPPES and Medicare records.
Graduated medical school · 1995
Albany Medical College
31 years in practice
Senior practitioner
Pulmonologists specialize in respiratory conditions including asthma, COPD, pneumonia, pulmonary fibrosis, sleep apnea, and lung cancer screening. They manage patients on ventilators and perform bronchoscopies.
Taxonomy: 207RP1001X
Education & Training
Albany Medical College of Union University (Class of 1995)
Virtual Pulmonary Disease Care With Karen Mrejen
NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.
Schedule a virtual visit with Karen Mrejen for blood pressure monitoring, cholesterol management, COPD management — no travel to Rockville Centre required. The office sends a secure video link before your appointment. Most visits take 15–30 minutes. Medicare enrolled per CMS records.
Frequently Asked Questions
Common questions about Karen Mrejen
NPI records show Dr. Mrejen as active with telehealth listed in Rockville Centre, NY. NPI status alone doesn't confirm open availability — call the office to confirm. Phone: (516) 536-8151.
Sourced from CMS NPPES · OIG LEIE · CMS QPP 2023 · CMS Medicare Part D · CMS Open Payments 2018 · CMS Physician Comparator. See Data Methodology.
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Contact Karen Mrejen
Practice Location
200 N Village Ave Suite 300, Rockville Centre, NY 11570-2341
Mailing Address
200 N Village Ave Suite 300, Rockville Centre, NY 11570-2341
This is a provider directory. Contact the office directly to schedule appointments.
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