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

Marenna Rose Cowan, FNP-C

Individual provider Registered Nurse · NPI 1063078806

Marenna Rose Cowan, FNP-C is a Nurse Practitioner in Costa Mesa, California. Qualified in 2018, 8 years ago. Practices with Memorialcare Medical Foundation, a 562-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in California.

Years since qualifying
8
Licensed in
CA
In the registry since
2019
Specialties on file
3
What do these letters mean?
FNP-C — Family Nurse Practitioner, Certified
A family nurse practitioner certified by the AANP.

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Practice location Address checks out

660 Baker St Ste A102
Costa Mesa, CA 92626-4407
Phone: (714) 668-2505
Fax: (714) 668-2515
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 4950 Barranca Pkwy Ste 104, Irvine, CA 92604-8644 — (949) 857-1248

Specialties & licences

Family Nurse Practitioner (primary) Taxonomy 363LF0000X · Licence 95009121 (CA)
Registered Nurse Taxonomy 163W00000X · Licence 95079580 (CA)
Nurse Practitioner Taxonomy 363L00000X · Licence 95009121 (CA)

Record details

NPI number1063078806
Entity typeIndividual (Type 1)
GenderFemale
Credentials FNP-C
Sole proprietorNo
NPI enumeratedMay 16, 2019
Last updated in NPPESNovember 19, 2025
Certification dateNovember 19, 2025

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2018 (8 years in practice)
Group practice Memorialcare Medical Foundation — 562 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations7 on file with Medicare

Other providers in Costa Mesa