DR. STEVE A MERMELSTEIN MD
NPI 1275516205
Internal Medicine - Pulmonary Disease in Lynbrook, NY
About Dr. Steve A Mermelstein Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. STEVE A MERMELSTEIN MD (NPI 1275516205) is an individual pulmonary disease provider in Lynbrook, New York, licensed in New York (135543) and active in the NPI registry since November 2005. He is enrolled in Medicare PECOS and is a graduate of Albert Einstein College Of Medicine Of Yeshiva University (1977).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 3
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Steve A Mermelstein 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.
Medicare Billing Reassignment
Medicare enrollment records show Steve Mermelstein reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Lynbrook, NY 11563
- Reassigned Medicare billing, New York enrollment
- 596 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 19
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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 11563 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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.
Reported Quality Measures
Referred Medical Equipment & Supplies CMS DME claims 22
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
LYNBROOK, NY 11563
LYNBROOK, NY 11563
LYNBROOK, NY 11563
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 Steve Mermelstein's NPI number?
The NPI number for Steve Mermelstein is 1275516205. It was assigned to this individual provider in the NPPES registry on November 23, 2005.
Where is Steve Mermelstein located?
Steve Mermelstein practices at 444 Merrick Rd Lower Level 1, Lynbrook, NY 11563. The listed phone number is (516) 593-9500.
What is Steve Mermelstein's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Pulmonary Disease, with taxonomy code 207RP1001X.
Is Steve Mermelstein enrolled in Medicare?
Yes. Steve Mermelstein 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.
Which organization bills Medicare for Steve Mermelstein's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Steve Mermelstein reassigns Medicare benefits to City Medical Of Upper East Side, PLLC (Lynbrook, NY). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Steve Mermelstein's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Steve Mermelstein was last updated on July 24, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.