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

MS. Hayley Marie Mertz, COTA/L

Individual provider Occupational Therapy Assistant · NPI 1437489887

MS. Hayley Marie Mertz, COTA/L is an Occupational Therapy Assistant in Saint Louis, Missouri. Licensed in Missouri. Registered with an NPI since 2010.

Licensed in
MO
In the registry since
2010
What do these letters mean?
COTA/L — Certified Occupational Therapy Assistant, Licensed
An occupational therapy assistant who is both certified and state licensed.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

3625 Magnolia Ave
Saint Louis, MO 63110-4048
Phone: (314) 771-2990
Fax: (314) 771-7790
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

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

Specialties & licences

Occupational Therapy Assistant (primary) Taxonomy 224Z00000X · Licence 2009030135 (MO)

Record details

NPI number1437489887
Entity typeIndividual (Type 1)
GenderFemale
Credentials COTA/L
Sole proprietorNo
NPI enumeratedJanuary 7, 2010
Last updated in NPPESJanuary 7, 2010

Other providers in Saint Louis