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

Mark William Baker, MD

Individual provider Emergency Medicine Physician · NPI 1861547945

Mark William Baker, MD is an Emergency Medicine Physician in Aiea, Hawaii. Licensed in Hawaii. Registered with an NPI since 2007.

Licensed in
HI
In the registry since
2007
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

98-1079 Moanalua Rd
Aiea, HI 96701-4713 Not confirmed with CMS for 15 years — call before visiting
Phone: (330) 493-4443
Fax: (330) 493-8677
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence MD6652 (HI)

Record details

NPI number1861547945
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJanuary 25, 2007
Last updated in NPPESNovember 19, 2010

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 patients356
Services billed 401 a service is one billed item, such as a visit, a test or a procedure
Average patient age78

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.

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