DR. MARGARET DOWLING SAREZKY M.D.
NPI 1841638533
Pediatrics in Baltimore, MD
About Dr. Margaret Dowling Sarezky M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MARGARET DOWLING SAREZKY M.D. (NPI 1841638533) is an individual pediatrics provider in Baltimore, Maryland, licensed in Maryland (D83174) and active in the NPI registry since June 2013. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. Margaret Dowling Sarezky M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Margaret Sarezky reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Baltimore, MD 21224
- Reassigned Medicare billing, Maryland enrollment
- 4,483 clinicians in this Medicare group
Baltimore, MD 21287
- Reassigned Medicare billing, Maryland enrollment
- 34 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 21224 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
BALTIMORE, MD 21224
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 Margaret Sarezky's NPI number?
The NPI number for Margaret Sarezky is 1841638533. It was assigned to this individual provider in the NPPES registry on June 5, 2013.
Where is Margaret Sarezky located?
Margaret Sarezky practices at 4940 Eastern Ave Fl 4, Baltimore, MD 21224. The listed phone number is (410) 550-0963.
What is Margaret Sarezky's specialty?
The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.
Is Margaret Sarezky enrolled in Medicare?
Yes. Margaret Sarezky is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Margaret Sarezky's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Margaret Sarezky reassigns Medicare benefits to 2 organizations: Johns Hopkins University (Baltimore, MD) and Johns Hopkins University (Baltimore, MD). Each 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 Margaret Sarezky'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 Margaret Sarezky was last updated on June 23, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Dr. Margaret Dowling Sarezky, M.D. · NPI 1841638533
Pediatrics physician in Baltimore, Maryland. Individual provider, active in the CMS NPPES registry since June 5, 2013.
## Identity
- **NPI:** 1841638533 (Entity type: Individual)
- **Enumerated:** June 5, 2013
- **Primary specialty:** Pediatrics · taxonomy 208000000X
- **State license:** D83174 (Maryland)
- **Sole proprietor:** No
## Practice location
- **Address:** 4940 EASTERN AVE FL 4, Baltimore, MD 21224-2735
- **Phone:** (410) 550-0963 · **Fax:** (410) 550-4153
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Johns Hopkins University (NPI 1306810619, Baltimore, MD); Johns Hopkins University (NPI 1992360861, Baltimore, MD) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** June 23, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1841638533) · Data from the CMS NPPES public registry.