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

Dr. Mark A Underwood, MD

Individual provider Neonatal-Perinatal Medicine Physician · NPI 1265414460

Dr. Mark A Underwood, MD is a Neonatal-Perinatal Medicine Physician in Spokane, Washington. Practices as a sole proprietor and works from 2 locations. Licensed in California and Washington.

Licensed in
CA, WA
In the registry since
2005
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

101 W 8th Ave
Spokane, WA 99204-2307
Phone: (509) 474-3131
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 2315 Stockton Blvd, Sacramento, CA 95817-2201 — (916) 703-3050

Specialties & licences

Neonatal-Perinatal Medicine Physician (primary) Taxonomy 2080N0001X · Licence A45353 (CA)
Neonatal-Perinatal Medicine Physician Taxonomy 2080N0001X · Licence MD61106174 (WA)

Record details

NPI number1265414460
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedNovember 15, 2005
Last updated in NPPESFebruary 5, 2021
Certification dateFebruary 5, 2021

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