DR. MARY CATHERINE BROWN MD
NPI 1861953119
Otolaryngology - Pediatric Otolaryngology in Baltimore, MD
About Dr. Mary Catherine Brown Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MARY CATHERINE BROWN MD (NPI 1861953119) is an individual pediatric otolaryngology provider in Baltimore, Maryland, licensed in Pennsylvania (MT230506) and active in the NPI registry since March 2019. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses 3
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. Mary Catherine Brown Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Mary Brown 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
Philadelphia, PA 19104
- Reassigned Medicare billing, Pennsylvania enrollment
- 178 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.
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.
BALTIMORE, MD 21224
BALTIMORE, MD 21224
BALTIMORE, MD 21224
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 Mary Brown's NPI number?
The NPI number for Mary Brown is 1861953119. It was assigned to this individual provider in the NPPES registry on March 28, 2019.
Where is Mary Brown located?
Mary Brown practices at 4940 Eastern Ave, Baltimore, MD 21224. The listed phone number is (410) 550-5568.
What is Mary Brown's specialty?
The primary specialty registered for this NPI is Otolaryngology, specializing in Pediatric Otolaryngology, with taxonomy code 207YP0228X.
Is Mary Brown enrolled in Medicare?
Yes. Mary Brown is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Mary Brown's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mary Brown reassigns Medicare benefits to 2 organizations: Johns Hopkins University (Baltimore, MD) and Children's Surgical Associates Ltd (Philadelphia, PA). 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 Mary Brown'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 Mary Brown was last updated on July 17, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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. Mary Catherine Brown, MD · NPI 1861953119
Pediatric Otolaryngology physician in Baltimore, Maryland. Individual provider, active in the CMS NPPES registry since March 28, 2019.
## Identity
- **NPI:** 1861953119 (Entity type: Individual)
- **Enumerated:** March 28, 2019
- **Primary specialty:** Otolaryngology - Pediatric Otolaryngology · taxonomy 207YP0228X
- **State license:** MT230506 (Pennsylvania)
- **Sole proprietor:** No
## Practice location
- **Address:** 4940 EASTERN AVE, Baltimore, MD 21224-2735
- **Phone:** (410) 550-5568
## 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 1275515546, Baltimore, MD); Children's Surgical Associates Ltd (NPI 1144399825, Philadelphia, PA) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** July 17, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1861953119) · Data from the CMS NPPES public registry.