Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Mary Ann N. Onyeali, MD, MBA

Individual provider Anesthesiology Physician · NPI 1710320312

Mary Ann N. Onyeali, MD, MBA practises Anesthesiology in Baltimore, Maryland. Qualified in 2013, 13 years ago. Practices with Anesthesia Company LLC, a 377-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Maryland.

Years since qualifying
13
Licensed in
MD
In the registry since
2013
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.
MBA — Master of Business Administration
A graduate business degree.

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Practice location Address checks out

5601 Loch Raven Blvd
Baltimore, MD 21239-2945
Phone: (443) 444-8000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 201 E University Pkwy, Baltimore, MD 21218-2829 — (410) 554-2000

Specialties & licences

Anesthesiology Physician (primary) Taxonomy 207L00000X · Licence D83953 (MD)

Record details

NPI number1710320312
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD , MBA
Sole proprietorYes
NPI enumeratedApril 12, 2013
Last updated in NPPESAugust 7, 2019

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyANESTHESIOLOGY
Medical schoolOTHER
Graduated 2013 (13 years in practice)
Group practice Anesthesia Company Llc — 377 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations4 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients124
Services billed 126 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at Anesthesia Company LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 377 clinicians in the practice; 12 are shown here.

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