Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Mrs. Mary B O'Brien, RN-C, FNP, MS

Individual provider Family Nurse Practitioner · NPI 1336276864

Mrs. Mary B O'Brien, RN-C, FNP, MS is a Family Nurse Practitioner in Allendale, Michigan. Licensed in Michigan. Registered with an NPI since 2007.

Licensed in
MI
In the registry since
2007
What do these letters mean?
FNP — Family Nurse Practitioner
A nurse practitioner who treats patients of all ages, much like a family doctor.
MS — Master of Science
A graduate science degree.

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Practice location Address checks out

10383 42nd Ave
Allendale, MI 49401-8207
Phone: (616) 252-6030
Fax: (616) 252-6035
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Nurse Practitioner (primary) Taxonomy 363LF0000X · Licence 4704107338 (MI)

Record details

NPI number1336276864
Entity typeIndividual (Type 1)
GenderFemale
Credentials RN-C , FNP , MS
Sole proprietorNo
NPI enumeratedFebruary 28, 2007
Last updated in NPPESFebruary 21, 2012

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