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

Dr. Richard Augustus Messian, MD

Individual provider Gastroenterology Physician · NPI 1609929751

Dr. Richard Augustus Messian, MD is a Gastroenterology Physician in Concord, California. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
In the registry since
2007
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

2415 High School Ave Ste 100
Concord, CA 94520-1800
Phone: (925) 687-9650
Fax: (925) 685-8447
Show map & directions

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

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence G268490 (CA)

Record details

NPI number1609929751
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJanuary 20, 2007
Last updated in NPPESMay 6, 2008

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