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

Dr. Karl W Diehn, MD

Individual provider Specialist · NPI 1467466623

Dr. Karl W Diehn, MD is a Specialist in Baltimore, Maryland. Practices as a sole proprietor. Licensed in Maryland.

Licensed in
MD
In the registry since
2006
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

6565 N Charles St Ste 601
Baltimore, MD 21204-6800
Phone: (410) 821-5151
Fax: (410) 823-8309
Show map & directions

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

Specialties & licences

Specialist (primary) Taxonomy 174400000X · Licence D0019874 (MD)

Record details

NPI number1467466623
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJuly 27, 2006
Last updated in NPPESDecember 13, 2013

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