MARY ANN N. ONYEALI MD, MBA
NPI 1710320312
Anesthesiology in Baltimore, MD
About Mary Ann N. Onyeali Md, Mba NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARY ANN N. ONYEALI MD, MBA (NPI 1710320312) is an individual anesthesiology provider in Baltimore, Maryland, licensed in Maryland (D83953) and active in the NPI registry since April 2013. She is enrolled in Medicare PECOS, is affiliated with Luminis Health Anne Arundel Medical Center, Inc, and maintains a secondary practice location in Baltimore.
NPPES Registry Identity
Specialties & Licenses
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
Mary Ann N. Onyeali Md, Mba 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 Reassignments
3Medicare enrollment records show Mary Ann Onyeali reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Annapolis, MD 21401
- Reassigned Medicare billing, District of Columbia and Maryland enrollments
- 391 clinicians in this Medicare group
Alexandria, VA 22306
- Reassigned Medicare billing, District of Columbia enrollment
- 634 clinicians in this Medicare group
Prince Frederick, MD 20678
- Reassigned Medicare billing, District of Columbia enrollment
- 196 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 2
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 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Luminis Health Anne Arundel Medical Center, Inc
Acute Care Hospitals · Annapolis, MDLuminis Health Doctors Community Medical Ctr, Inc
Acute Care Hospitals · Lanham, MDInova Mount Vernon Hospital
Acute Care Hospitals · Alexandria, VAMedicare 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.
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 21239
BALTIMORE, MD 21239
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 Ann Onyeali's NPI number?
The NPI number for Mary Ann Onyeali is 1710320312. It was assigned to this individual provider in the NPPES registry on April 12, 2013.
Where is Mary Ann Onyeali located?
Mary Ann Onyeali practices at 5601 Loch Raven Blvd, Baltimore, MD 21239. The listed phone number is (443) 444-8000.
What is Mary Ann Onyeali's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is Mary Ann Onyeali enrolled in Medicare?
Yes. Mary Ann Onyeali 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 organizations bill Medicare for Mary Ann Onyeali's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mary Ann Onyeali reassigns Medicare benefits to 3 organizations: Anesthesia Company, LLC (Annapolis, MD), Northstar Anesthesia Of Virginia, LLC (Alexandria, VA) and North American Partners In Anesthesia Maryland LLC (Prince Frederick, 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 Mary Ann Onyeali's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Mary Ann Onyeali affiliated with any hospitals?
According to CMS data, Mary Ann Onyeali is affiliated with Luminis Health Anne Arundel Medical Center, Inc, Luminis Health Doctors Community Medical Ctr, Inc and Inova Mount Vernon Hospital.
When was this NPI record last updated?
The NPPES record for Mary Ann Onyeali was last updated on August 7, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.
# Mary Ann N. Onyeali, MD, MBA · NPI 1710320312
Anesthesiology physician in Baltimore, Maryland. Individual provider, active in the CMS NPPES registry since April 12, 2013.
## Identity
- **NPI:** 1710320312 (Entity type: Individual)
- **Enumerated:** April 12, 2013
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** D83953 (Maryland)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 5601 LOCH RAVEN BLVD, Baltimore, MD 21239-2945
- **Phone:** (443) 444-8000
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Anesthesia Company, LLC (NPI 1871548156, Annapolis, MD); Northstar Anesthesia Of Virginia, LLC (NPI 1194488791, Alexandria, VA); North American Partners In Anesthesia Maryland LLC (NPI 1093707879, Prince Frederick, MD) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2013
## Record status
- **NPPES last updated:** August 7, 2019
---
Source: [NPI Profile](https://npiprofile.com/npi/1710320312) · Data from the CMS NPPES public registry.