DR. ALEXANDER MAZEROV MD
NPI 1437544533
Anesthesiology in New York, NY
About Dr. Alexander Mazerov Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ALEXANDER MAZEROV MD (NPI 1437544533) is an individual anesthesiology provider in New York, New York, licensed in New York (297259) and active in the NPI registry since April 2015. He is enrolled in Medicare PECOS, is affiliated with Mount Sinai Hospital, and maintains a secondary practice location in New York.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 1
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. Alexander Mazerov 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 Alexander Mazerov reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
New York, NY 10029
- Reassigned Medicare billing, New York enrollment
- 1,067 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
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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Mount Sinai Hospital
Acute Care Hospitals · New York, NYOther Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
NEW YORK, NY 10029
NEW YORK, NY 10029
NEW YORK, NY 10029
NEW YORK, NY 10029
NEW YORK, NY 10029
NEW YORK, NY 10029
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 Alexander Mazerov's NPI number?
The NPI number for Alexander Mazerov is 1437544533. It was assigned to this individual provider in the NPPES registry on April 6, 2015.
Where is Alexander Mazerov located?
Alexander Mazerov practices at One Gustave L. Levy Place, New York, NY 10029. The listed phone number is (212) 241-6500.
What is Alexander Mazerov's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is Alexander Mazerov enrolled in Medicare?
Yes. Alexander Mazerov 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 Alexander Mazerov's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Alexander Mazerov reassigns Medicare benefits to Fpa Hospital Based (New York, 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 Alexander Mazerov's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Alexander Mazerov affiliated with any hospitals?
According to CMS data, Alexander Mazerov is affiliated with Mount Sinai Hospital.
When was this NPI record last updated?
The NPPES record for Alexander Mazerov was last updated on September 2, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 months 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.
# Dr. Alexander Mazerov, MD · NPI 1437544533
Anesthesiology physician in New York, New York. Individual provider, active in the CMS NPPES registry since April 6, 2015.
## Identity
- **NPI:** 1437544533 (Entity type: Individual)
- **Enumerated:** April 6, 2015
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** 297259 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** ONE GUSTAVE L. LEVY PLACE, New York, NY 10029
- **Phone:** (212) 241-6500
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Fpa Hospital Based (NPI 1629319413, New York, NY), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2015
## Record status
- **NPPES last updated:** September 2, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1437544533) · Data from the CMS NPPES public registry.