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

Dr. Douglas McCallum, MD

Individual provider Internal Medicine Physician · NPI 1801893110

Dr. Douglas McCallum, MD is an Internal Medicine Physician in Denver, Colorado. Licensed in Colorado. Registered with an NPI since 2005.

Licensed in
CO
In the registry since
2005
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

425 S Cherry St Ste 510
Denver, CO 80246-1226
Phone: (303) 388-4076
Fax: (303) 320-0439
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 21565 (CO)

Record details

NPI number1801893110
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 30, 2005
Last updated in NPPESOctober 4, 2013

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