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

MS. Marcia Tumy Byrnes, RN, FNP

Individual provider Administrator Registered Nurse · NPI 1801035043

MS. Marcia Tumy Byrnes, RN, FNP is an Administrator Registered Nurse in San Rafael, California. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
In the registry since
2009
Specialties on file
3
What do these letters mean?
RN — Registered Nurse
A licensed nurse who completed a nursing degree and passed the NCLEX-RN examination.
FNP — Family Nurse Practitioner
A nurse practitioner who treats patients of all ages, much like a family doctor.

See every abbreviation used in this directory →

Practice location Address checks out

16 Ritter St
San Rafael, CA 94901-3323
Phone: (415) 457-8182
Fax: (415) 457-3490
Show map & directions

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

Specialties & licences

Family Nurse Practitioner (primary) Taxonomy 363LF0000X · Licence 18821 (CA)
Administrator Registered Nurse Taxonomy 163WA2000X · Licence 236717 (CA)
Community Health Registered Nurse Taxonomy 163WC1500X · Licence 19099 (CA)

Record details

NPI number1801035043
Entity typeIndividual (Type 1)
GenderFemale
Credentials RN , FNP
Sole proprietorYes
NPI enumeratedFebruary 11, 2009
Last updated in NPPESFebruary 11, 2009