DR. KAREN MREJEN MD
NPI 1902999212
Internal Medicine - Pulmonary Disease in Rockville Centre, NY

Q: What is Karen Mrejen's NPI number?

The NPI number for Karen Mrejen is 1902999212. It was assigned to this individual provider in the NPPES registry on October 2, 2006. The provider is also known as Dr. Karen Mrejen-Shakin.

Q: Where is Karen Mrejen located?

Karen Mrejen practices at 200 N Village Ave Suite 300, Rockville Centre, NY 11570. The listed phone number is (516) 536-8151.

Q: What is Karen Mrejen's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Pulmonary Disease, with taxonomy code 207RP1001X.

Q: Is Karen Mrejen enrolled in Medicare?

Yes. Karen Mrejen is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Q: Is Karen Mrejen affiliated with any hospitals?

According to CMS data, Karen Mrejen is affiliated with Ns/Lij Hs Southside Hospital, North Shore University Hospital, Northwell Hospital Glen Cove and Long Island Jewish Medical Center.

Q: When was this NPI record last updated?

The NPPES record for Karen Mrejen was last updated on November 14, 2013. NPI Profile syncs with the weekly NPPES data releases published by CMS.

Active since October 02, 2006PECOS EnrolledAccepts Medicare Assignment

91.25/100

CMS Quality Rating

200 N VILLAGE AVE, SUITE 300, ROCKVILLE CENTRE, NY 11570(516) 536-8151(516) 536-8153 Get Directions Write a Review

NPPES record last updated: November 14, 2013. Verified against the NPPES registry weekly; last sync: July 26, 2026.

On this page

About Dr. Karen Mrejen Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. KAREN MREJEN MD (NPI 1902999212) is an individual pulmonary disease provider in Rockville Centre, New York, licensed in New York (224857) and active in the NPI registry since October 2006. She is enrolled in Medicare PECOS, is affiliated with Ns/lij Hs Southside Hospital, and is a graduate of Albany Medical College Of Union University (1995).

NPPES Registry Identity

NPI1902999212

Entity TypeIndividualFemale

Primary Taxonomy207RP1001X

Provider Legal NameDR. KAREN MREJENCredential: MD

Location Address200 N VILLAGE AVE, SUITE 300Rockville Centre, NY 11570-2341

Mailing Address200 N Village Ave, Suite 300Rockville Centre, NY 11570-2341 · (516) 536-8151 · Fax (516) 536-8153

Phone(516) 536-8151

Fax(516) 536-8153

Sole ProprietorNo

Medical School CMSAlbany Medical College Of Union UniversityGraduated 1995

Enumeration DateOctober 2, 2006

Last NPPES UpdateNovember 14, 2013

✔ NPI 1902999212 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Pulmonary DiseaseAllopathic & Osteopathic Physicians

Taxonomy Code207RP1001X

License✔ Licensed in NY · 224857

Definition

An internist who treats diseases of the lungs and airways. The pulmonologist diagnoses and treats cancer, pneumonia, pleurisy, asthma, occupational and environmental diseases, bronchitis, sleep disorders, emphysema and other complex disorders of the lungs.

200 N VILLAGE AVE, Rockville Centre, NY 11570

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Other Names 1

Other Name (5)Dr. Karen Mrejen-shakin

Other Identifiers 1

Medicare UPINH51949NY

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Karen Mrejen Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID3971773961

PECOS Enrollment IDI20120724000994

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 16

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit, 30-39 minutes 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

130 services98 patients

Established patient office or other outpatient visit, 20-29 minutes 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

115 services81 patients

Test to measure expiratory airflow and volume 94010

This test, known as spirometry, assesses how well your lungs work. It measures how much air you can inhale, how much you can exhale and how quickly you can exhale. It's non-invasive and helps diagnose conditions like asthma or COPD.

87 services87 patients

Follow-up hospital inpatient care per day, typically 25 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

83 services60 patients

Test to determine lung volumes using gas dilution or washout 94727

This test measures lung volumes by either diluting or washing out a known amount of gas in your lungs. You'll breathe in a harmless gas, then exhale. The exhaled air is analyzed to assess your lung capacity and function.

77 services77 patients

Blood count, hemoglobin 85018

A blood count, specifically hemoglobin, is a standard test that measures the amount of hemoglobin in your blood. Hemoglobin is a protein in red blood cells that carries oxygen throughout your body. This test helps assess your overall health and detect a variety of disorders such as anemia or polycythemia.

76 services76 patients

Test to examine how well the lungs exchange gases 94729

This is a test called a pulmonary function test, which helps understand the efficiency of your lungs. It measures how much air your lungs can hold, how quickly you can move air in and out of your lungs, and how well your lungs put oxygen into and remove carbon dioxide from your blood.

76 services76 patients

Follow-up hospital inpatient care per day, typically 35 minutes 99233

Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.

65 services54 patients

New patient office or other outpatient visit, 45-59 minutes 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

48 services48 patients

Established patient office or other outpatient visit, 40-54 minutes 99215

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

46 services42 patients

Initial hospital inpatient care per day, typically 50 minutes 99222

Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.

37 services37 patients

Initial hospital inpatient care per day, typically 70 minutes 99223

Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.

28 services27 patients

Administration of pneumococcal vaccine G0009

The pneumococcal vaccine helps protect against pneumococcal bacteria, which can cause severe infections like pneumonia and meningitis. The vaccine is given as an injection, typically in the arm. It's recommended for infants, older adults, and those with certain health conditions.

21 services21 patients

Pneumococcal conjugate vaccine, 20 valent (pcv20), for intramuscular use 90677

The Pneumococcal Conjugate Vaccine (PCV20) is a shot given to protect against 20 types of bacteria that can cause serious infections like pneumonia and meningitis. It's administered through a muscle, usually in the arm. It's important for overall health.

20 services20 patients

Smoking and tobacco use intensive counseling, 4-10 minutes 99406

This service provides brief, intensive counseling (4-10 minutes) to support you in quitting smoking or tobacco use. It involves discussing the risks of tobacco use, benefits of quitting, and strategies to help you stop. It's a critical step towards a healthier lifestyle.

16 services16 patients

Telephone medical discussion with physician, 11-20 minutes 99442

This is a service where you have a phone conversation with your doctor for 11-20 minutes. It's used for discussing health concerns, reviewing test results, or managing ongoing conditions. It's a convenient way to receive medical advice without an in-person visit.

12 services11 patients

Hospital Affiliations CMS Care Compare 4

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Ns/Lij Hs Southside Hospital

Acute Care Hospitals · Bay Shore, NY

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number330043

Location301 East Main StreetBay Shore, NY 11706 · Suffolk County

Emergency services Birthing friendly

North Shore University Hospital

Acute Care Hospitals · Manhasset, NY

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number330106

Location300 Community DriveManhasset, NY 11030 · Nassau County

Emergency services Birthing friendly

Northwell Hospital Glen Cove

Acute Care Hospitals · Glen Cove, NY

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number330181

Location101 St Andrews LaneGlen Cove, NY 11542 · Nassau County

Emergency services

Long Island Jewish Medical Center

Acute Care Hospitals · New Hyde Park, NY

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number330195

Location270 - 05 76th AvenueNew Hyde Park, NY 11040 · Nassau County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 11570 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$154.28 typical visit price

range $67.40 – $203.53

Typical copayment $38.57 (range $16.85 – $50.88)

Most-billed visit code 99204

Established Patient

$117.62 typical visit price

range $21.66 – $164.45

Typical copayment $29.40 (range $5.41 – $41.11)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

91.25/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored through an Alternative Payment Model

Quality

74.92

Promoting Interoperability

91.67

Improvement Activities

Reported Quality Measures

Care Plan

Percentage of patients aged 65 years and older who have an advance care plan or surrogate decision maker documented in the medical record that an advance care plan was discussed but the patient did not wish or was not able to name a surrogate decision maker…

83%29 patients4/55-star benchmark: 100%

Chronic Obstructive Pulmonary Disease (COPD): Long-Acting Inhaled Bronchodilator Therapy

Percentage of patients aged 18 years and older with a diagnosis of COPD (FEV1/FVC < 70%) and who have an FEV1 less than 60% predicted and have symptoms who were prescribed an long-acting inhaled bronchodilator

100%25 patients5/55-star benchmark: 100%

Chronic Obstructive Pulmonary Disease (COPD): Spirometry Evaluation

Percentage of patients aged 18 years and older with a diagnosis of COPD who had spirometry results documented

100%42 patients5/55-star benchmark: 100%

Documentation of Current Medications in the Medical Record

Percentage of visits for patients aged 18 years and older for which the eligible professional or eligible clinician attests to documenting a list of current medications using all immediate resources available on the date of the encounter.

100%46 patients5/55-star benchmark: 100%

e-Prescribing

At least one permissible prescription written by the MIPS eligible clinician is queried for a drug formulary and transmitted electronically using certified EHR technology.

100%601 patients5/55-star benchmark: 100%

Medication Reconciliation

The MIPS eligible clinician performs medication reconciliation for at least one transition of care in which the patient is transitioned into the care of the MIPS eligible clinician.

98%123 patients4/55-star benchmark: 100%

Patient-Specific Education

The MIPS eligible clinician must use clinically relevant information from CEHRT to identify patient-specific educational resources and provide access to those materials to at least one unique patient seen by the MIPS eligible clinician.

13%211 patients1/55-star benchmark: 100%

Pneumococcal Vaccination Status for Older Adults

Percentage of patients 65 years of age and older who have ever received a pneumococcal vaccine

90%30 patients4/55-star benchmark: 95%

Provide Patient Access

At least one patient seen by the MIPS eligible clinician during the performance period is provided timely access to view online, download, and transmit to a third party their health information subject to the MIPS eligible clinician's discretion to withhold…

31%211 patients2/55-star benchmark: 100%

Secure Messaging

For at least one unique patient seen by the MIPS eligible clinician during the performance period, a secure message was sent using the electronic messaging function of CEHRT to the patient (or the patient-authorized representative), or in response to a secure…

0%211 patients1/55-star benchmark: 79%

Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

Referred Medical Equipment & Supplies CMS DME claims 6

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Nebulizer, with compressor E0570

DME-Other DME · category DE000N

4 suppliers100 claims105 services$2.88 avg. paid by Medicare

Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate E1390

DME-Oxygen and Supplies · category DC002N

5 suppliers41 claims51 services$58.20 avg. paid by Medicare

Portable oxygen concentrator, rental E1392

DME-Oxygen and Supplies · category DC002N

5 suppliers31 claims40 services$29.20 avg. paid by Medicare

Albuterol, inhalation solution, fda-approved final product, non-compounded, administered through dme, unit dose, 1 mg J7613

DME-Drugs Administered Through DME · category DG006N

10 suppliers16 claims4,157 services$0.03 avg. paid by Medicare

Budesonide, inhalation solution, fda-approved final product, non-compounded, administered through dme, unit dose form, up to 0.5 mg J7626

DME-Drugs Administered Through DME · category DG000N

9 suppliers22 claims1,455 services$0.77 avg. paid by Medicare

Pharmacy dispensing fee for inhalation drug(s); per 30 days Q0513

DME-Other DME · category DE000N

15 suppliers30 claims30 services$23.51 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 14

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. HOWARD N. KESSLER D.P.M.

Podiatrist (Foot Surgery)

200 N VILLAGE AVE, SUITE 101
ROCKVILLE CENTRE, NY 11570

Nassau County (516) 764-0434

DR. CHARLES JOSEPH KANDLER M.D.

Urology

200 N VILLAGE AVE, SUITE 300
ROCKVILLE CENTRE, NY 11570

Nassau County (516) 766-2929

DR. ERIC HYIAM THALL M.D.

Urology

200 N VILLAGE AVE, SUITE 300
ROCKVILLE CENTRE, NY 11570

Nassau County (516) 766-2929

DR. ALBERT STEWART KATZ M.D.

Urology

200 N VILLAGE AVE, SUITE 300
ROCKVILLE CENTRE, NY 11570

Nassau County (516) 766-2929

DR. DAVID E KARPE DPM

Podiatrist

200 N VILLAGE AVE, SUITE 101
ROCKVILLE CENTRE, NY 11570

Nassau County (516) 764-0430

DR. JEREMY ZVI FRIEDMAN CNIM, D.C

Specialist/Technologist, Other (Electroneurodiagnostic)

200 N VILLAGE AVE, #B7
ROCKVILLE CENTRE, NY 11570

Nassau County (973) 986-2763

ALL ISLAND PODIATRY PC

Podiatrist (Primary Podiatric Medicine)

200 N VILLAGE AVE, SUITE 101
ROCKVILLE CENTRE, NY 11570

Nassau County (516) 764-0434

DR. FRANK SAVERIO COLETTA MD

Internal Medicine (Pulmonary Disease)

200 N VILLAGE AVE, SUITE 300
ROCKVILLE CENTRE, NY 11570

Nassau County (516) 536-8151

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Karen Mrejen's NPI number?

The NPI number for Karen Mrejen is 1902999212. It was assigned to this individual provider in the NPPES registry on October 2, 2006. The provider is also known as Dr. Karen Mrejen-Shakin.

Where is Karen Mrejen located?

Karen Mrejen practices at 200 N Village Ave Suite 300, Rockville Centre, NY 11570. The listed phone number is (516) 536-8151.

What is Karen Mrejen's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Pulmonary Disease, with taxonomy code 207RP1001X.

Is Karen Mrejen enrolled in Medicare?

Yes. Karen Mrejen is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Is Karen Mrejen affiliated with any hospitals?

According to CMS data, Karen Mrejen is affiliated with Ns/Lij Hs Southside Hospital, North Shore University Hospital, Northwell Hospital Glen Cove and Long Island Jewish Medical Center.

When was this NPI record last updated?

The NPPES record for Karen Mrejen was last updated on November 14, 2013. NPI Profile syncs with the weekly NPPES data releases published by CMS.