Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. Douglas D Mayo, MD

Individual provider Emergency Medical Services (Emergency Medicine) Physician · NPI 1548221062

Dr. Douglas D Mayo, MD is an Emergency Medicine in Baltimore, Maryland. Qualified in 1999, 27 years ago. Practices with Adfinitas Health at Umcap LLC, a 53-clinician group and accepts Medicare assignment. Licensed in Maryland.

Years since qualifying
27
Licensed in
MD
In the registry since
2006
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

22 S Greene St
Baltimore, MD 21201-1544
Phone: (410) 362-3000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Emergency Medical Services (Emergency Medicine) Physician (primary) Taxonomy 207PE0004X · Licence D006155 (MD)
Specialist Taxonomy 174400000X · Licence D0061555 (MD)

Record details

NPI number1548221062
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 1, 2006
Last updated in NPPESJune 20, 2012

Medicare enrollment

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

Medicare specialtyEMERGENCY MEDICINE
Also practisesINTERNAL MEDICINE
Medical schoolOTHER
Graduated 1999 (27 years in practice)
Group practice Adfinitas Health At Umcap Llc — 53 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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