Marenna Rose Cowan, FNP-C
Family Nurse Practitioner · Costa Mesa, CA
Marenna Rose Cowan, FNP-C is a family nurse practitioner with a practice address in Costa Mesa, California, and NPI 1063078806, issued on May 16, 2019. Check the license (California 95009121, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Marenna Rose Cowan
- Credential
- FNP-C
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License numbers
- 95009121 CA
95079580 CA
Self-reported in NPPES; status is on the state search - Practice location
- 660 Baker St Ste A102, Costa Mesa, CA 92626
- Phone
- (714) 668-2505
- Enumerated
- May 16, 2019
- Record last updated
- Nov 19, 2025
- Fax
- (714) 668-2515
- Medicare enrollment
- Enrolled (PECOS I20190731001272); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 16,966 in California → Look up another NPI →
Also registered at 660 Baker St Ste A102
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Cassandra Tom, NPFamily Nurse Practitioner1609325430
- Sierra Wilson, DNPFamily Nurse Practitioner1386353746
Verify Marenna Rose Cowan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 95009121Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
86% fewer Medicare Part D claims than the average family nurse practitioner in 2024
177 Medicare Part D claims for 137 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D.
Most prescribed
- Nitrofurantoin Mono-Macro17 claims
- Doxycycline Monohydrate13 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through 3 group practices
- Coastal Family Medicine IncIrvine, CA
- Hmts IncIrvine, CA
- Memorialcare Medical FoundationCosta Mesa, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Marenna Rose Cowan among 16,966 family nurse practitioner records in California
Marenna Rose Cowan, FNP-C is one of 16,966 family nurse practitioner records with a practice address in California. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 50% of them.
- NPI issued2019 · 50% of these records are older, 44% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 40% of these records are
- Graduated2018 · median 2019 among the 6,793 with a school on file
- Record last updated2025 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
71 family nurse practitioner records list a practice address in Costa Mesa
They are 71 of the 4,286 NPPES records with a practice address in Costa Mesa, and 16,966 family nurse practitioner records in California.
All 16,966 in California → Every provider in Costa Mesa → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Andrea Beyaoju, NURSE PRACTITIONERCosta Mesa, CA 926261720520182
- Susan FlamingCosta Mesa, CA 926261780093237
- Arnold FrancoCosta Mesa, CA 926261518417633
- Suzanne Larkin, FNP-CCosta Mesa, CA 926261053358044
- Kendra Latty, FNP-CCosta Mesa, CA 926261659763589
- Shelly Lummus, FNPCosta Mesa, CA 926261649474545
- Jamila Ponder, F.N.P.-CCosta Mesa, CA 926261124215165
- Charlotte Russell, RNPCosta Mesa, CA 926261780636555
Common questions
What is Marenna Rose Cowan, FNP-C's NPI number?
Marenna Rose Cowan, FNP-C's National Provider Identifier (NPI) is 1063078806, issued on May 16, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Marenna Rose Cowan, FNP-C located?
The NPPES record lists a practice address at 660 Baker St Ste A102, Costa Mesa, CA, 92626. Phone: (714) 668-2505. Providers update this record themselves, so call before visiting.
How can I verify Marenna Rose Cowan, FNP-C's license?
NPPES lists California license number 95009121, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Marenna Rose Cowan, FNP-C prescribe under Medicare Part D?
In 2024, Marenna Rose Cowan, FNP-C had 177 Medicare Part D claims for 137 beneficiaries; the average among family nurse practitioner prescribers was 1,305. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.