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

William Arthur Grass, ARNP

Individual provider Critical Care Medicine Nurse Practitioner · NPI 1407854383

William Arthur Grass, ARNP is a Critical Care Medicine Nurse Practitioner in Creve Coeur, Missouri. Licensed in Florida. Registered with an NPI since 2005.

Licensed in
FL
In the registry since
2005
What do these letters mean?
ARNP — Advanced Registered Nurse Practitioner
The title some states use for an advanced practice nurse.

See every abbreviation used in this directory →

Practice location Address checks out

10 Barnes West Dr
Creve Coeur, MO 63141-6287
Phone: (314) 996-8270
Show map & directions

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

Specialties & licences

Critical Care Medicine Nurse Practitioner (primary) Taxonomy 363LC0200X · Licence ARNP9207097 (FL)

Record details

NPI number1407854383
Entity typeIndividual (Type 1)
GenderMale
Credentials ARNP
Sole proprietorNo
NPI enumeratedJuly 13, 2005
Last updated in NPPESJuly 30, 2025
Certification dateJuly 30, 2025