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Internal Medicine

Richard Mermelstein, MD

Sees patients in Great Neck, NY · New York

Summary

Richard Mermelstein, MD (Internal Medicine) is enrolled with Medicare at 1 practice location in Great Neck, NY. NPI 1629488440. Medicare data says the clinician accepts Medicare assignment. Source: CMS National Downloadable File, updated 2026-10-02.

NPI Registry record Medicare profile

From official Medicare data

This page shows what Medicare's official clinician data says about Richard Mermelstein, joined by NPI number (data updated 2026-10-02). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

At a glance

1Practice location
Internal MedicinePrimary specialty
YesAccepts Medicare assignment
YesOffers telehealth
12Years since medical school (graduated 2014)
MaleGender (as listed)

Quick answers

Where does Richard Mermelstein see patients?
Medicare's clinician data lists 1 practice location in Great Neck, NY. Call before your visit to confirm the address.
What is Richard Mermelstein's specialty?
Medicare lists Internal Medicine as the primary specialty.
Does Richard Mermelstein accept Medicare assignment?
Yes. Medicare's clinician data says Richard Mermelstein accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
Does Richard Mermelstein offer telehealth?
Medicare's clinician data says Richard Mermelstein offers telehealth services. Ask the office which visits can be done by video or phone.
What is Richard Mermelstein's NPI number?
1629488440. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Practice locations

Addresses where Richard Mermelstein is enrolled with Medicare (CMS data updated 2026-10-02).

  • 1010 Northern Blvd, Suite 328Great Neck, NY 11021

Specialties

Find other Internal Medicine doctors in New York →

Other internal medicine doctors in Great Neck

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

All internal medicine doctors in Great Neck →

Clinician information

CredentialMD
Graduation year2014
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
TelehealthOffers telehealth services
NPI (National Provider Identifier)1629488440
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. National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
  2. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  3. Medicare Care Compare — official Medicare tool to look up clinicians