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

Dr. Alan Marshall Johnson, DDS

Individual provider Dentist · NPI 1417395674

Dr. Alan Marshall Johnson, DDS is a Dentist in O Fallon, Missouri. Practices as a sole proprietor. Licensed in Missouri.

Licensed in
MO
In the registry since
2013
What do these letters mean?
DDS — Doctor of Dental Surgery
A dentist. DDS and DMD are the same qualification — universities choose which title to award.

See every abbreviation used in this directory →

Practice location Address checks out

126 Triad Ctr W
O Fallon, MO 63366-7541
Phone: (636) 978-2226
Fax: (636) 281-1441
Show map & directions

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

Specialties & licences

Dentist (primary) Taxonomy 122300000X · Licence 2012015896 (MO)

Record details

NPI number1417395674
Entity typeIndividual (Type 1)
GenderMale
Credentials DDS
Sole proprietorYes
NPI enumeratedJune 10, 2013
Last updated in NPPESJune 10, 2013
Mailing address126 Triad Ctr W, O Fallon, MO 63366-7541

Other providers in O Fallon