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

Mrs. Margaret Hammer, COTA

Individual provider Occupational Therapy Assistant · NPI 1487862439

Mrs. Margaret Hammer, COTA is an Occupational Therapy Assistant in Havre de Grace, Maryland. Licensed in Maryland. Registered with an NPI since 2007.

Licensed in
MD
In the registry since
2007
What do these letters mean?
COTA — Certified Occupational Therapy Assistant
Delivers treatment under an occupational therapist's direction.

See every abbreviation used in this directory →

Practice location Address checks out

415 Market St
Havre de Grace, MD 21078-3301
Phone: (410) 939-5500
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Occupational Therapy Assistant (primary) Taxonomy 224Z00000X · Licence A00128 (MD)

Record details

NPI number1487862439
Entity typeIndividual (Type 1)
GenderFemale
Credentials COTA
Sole proprietorNo
NPI enumeratedMay 21, 2007
Last updated in NPPESJuly 8, 2007

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