Karen Mrejen, MD
Pulmonary Disease Physician · Rockville Centre, NY
Karen Mrejen, MD is a pulmonary disease physician with a practice address in Rockville Centre, New York, and NPI 1902999212, issued on Oct 2, 2006. Check the license (New York 224857, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Karen Mrejen
- Credential
- MD
- Primary taxonomy
- Pulmonary Disease Physician 207RP1001X
- License number
- 224857 NY
Self-reported in NPPES; status is on the state search - Practice location
- 200 N Village Ave, Rockville Centre, NY 11570
- Phone
- (516) 536-8151
- Enumerated
- Oct 2, 2006
- Record last updated
- Nov 14, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (516) 536-8153
- Medicare enrollment
- Enrolled (PECOS I20120724000994); accepts Medicare assignment
- Medical or professional school
- Albany Medical College Of Union University, 1995
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest pulmonary disease physician records → All 1,230 in New York → Look up another NPI →
Also registered at 200 N Village Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Frank Coletta, MDPulmonary Disease Physician1952421885
- Marc Davis, MS, LMHCMental Health Counselor1982132841
- Jeremy Friedman, CNIM, D.CElectroneurodiagnostic Specialist/Technologist1629275219
- Judith Goldstein, MDInfectious Disease Physician1093871733
- Charles Kandler, M.D.Urology Physician1598756843
- David Karpe, DPMPodiatrist1649253030
Verify Karen Mrejen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNYS Education Department, Office of the Professions
Search for license 224857Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
92% more Medicare Part D claims than the average pulmonary disease physician in 2024
2,741 Medicare Part D claims for 497 beneficiaries, against an average of 1,425 among the 11,596 providers of this specialty who prescribed in Part D. Brand-name drugs were 52% of claims.
Most prescribed
- Albuterol Sulfate Hfa538 claims
- Trelegy Ellipta286 claims
- Breo Ellipta246 claims
- Azithromycin213 claims
- Prednisone186 claims
- Azelastine Hcl143 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The MIPS final score for 2023 (Medicare payment program): 91.3 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- North Shore-Lij Medical PCBay Shore, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Karen Mrejen among 1,230 pulmonary disease physician records in New York
Karen Mrejen, MD is one of 1,230 pulmonary disease physician records with a practice address in New York. 87% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 11% of them.
- NPI issued2006 · 11% of these records are older, 47% newer
- In a Medicare fileYes · 87% of these records are
- In the CMS Doctors and Clinicians fileYes · 77% of these records are
- Graduated1995 · median 1999 among the 943 with a school on file
- Record last updated2013 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RP1001X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Pulmonary Disease Physician providers in New York
There are 1,230 pulmonary disease physician records in New York.
All 1,230 in New York → Every provider in Rockville Centre → Pulmonary Disease Physician nationwide →
The 8 pulmonary disease physician records with the nearest ZIP codes
- Frank Coletta, MDRockville Centre, NY 115701952421885
- Aviva Kamath, M.DRockville Centre, NY 115701427352251
- Abdul Majeed, M.D. FCCPRockville Centre, NY 115701225136591
- Michael Megally, M.D.Rockville Ctr, NY 115701942549381
- Louis Saffran, M.DRockville Centre, NY 115701881795839
- Nera Sakowitz, M.D.Rockville Centre, NY 115701851458061
- Sepideh Sedgh, DORockville Centre, NY 115701316107204
- Magdi Sourour, M.D.Rockville Center, NY 115701174501431
Common questions
What is Karen Mrejen, MD's NPI number?
Karen Mrejen, MD's National Provider Identifier (NPI) is 1902999212, issued on Oct 2, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Karen Mrejen, MD located?
The NPPES record lists a practice address at 200 N Village Ave, Rockville Centre, NY, 11570. Phone: (516) 536-8151. Providers update this record themselves, so call before visiting.
How can I verify Karen Mrejen, MD's license?
NPPES lists New York license number 224857, as entered by the provider. Search the NYS Education Department, Office of the Professions at https://www.op.nysed.gov/services/verifications/online-verification-searches. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Karen Mrejen, MD prescribe under Medicare Part D?
In 2024, Karen Mrejen, MD had 2,741 Medicare Part D claims for 497 beneficiaries; the average among pulmonary disease physician prescribers was 1,425. Part D covers Medicare prescriptions only.
What is Karen Mrejen, MD's MIPS final score?
The 2023 MIPS final score is 91.3 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.