Doctor profile · Federal record
Dr. Marenna Cowan, FNP-C
Family Nurse Practitioner (CMS: Nurse Practitioner) · Registered Nurse · Nurse Practitioner · Costa Mesa, CA
- NPI 1063078806
- Accepts Medicare
- 8 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
660 Baker St Ste A102
Costa Mesa, CA 926264407
(714) 668-2505
fax (714) 668-2515 - Additional location
-
4950 Barranca Pkwy Ste 104
Irvine, CA 926048644
(949) 857-1248
fax (949) 559-1165 - Mailing address
-
Po Box 2218
Suisun City, CA 945855218
Credentials & registration
- NPI registered
- May 2019 — 7 yrs on file
- Profile last updated
- November 19, 2025
- Year of graduation
- 2018 — 8 yrs since
- Specialty taxonomy
- 363LF0000X — NUCC code
- State licenses (2)
- California #95009121 · California #95079580
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1063078806. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
32
Distinct HCPCS
2
Medicare allowed
$3,614
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 21 | 21 | $118 | |
99203 |
New patient office or other outpatient visit, 30-44 minutes | 11 | 11 | $103 |
In context: peer comparison
Among 10 peers in this city , average services per provider: 92. This provider delivers 0.3× the peer median.Hospital affiliations
Frequently asked questions
What is Dr. Marenna Cowan's medical specialty?
Dr. Marenna Cowan practices Family Nurse Practitioner in Costa Mesa, CA.
Where does Dr. Marenna Cowan practice?
Dr. Marenna Cowan practices at 660 Baker St Ste A102, Costa Mesa, CA 926264407. Office phone: 7146682505.
What is Dr. Marenna Cowan's NPI?
Dr. Marenna Cowan's National Provider Identifier (NPI) is 1063078806, issued by NPPES.
Does Dr. Marenna Cowan accept Medicare assignment?
Yes. Dr. Marenna Cowan accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Marenna Cowan commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); New patient office or other outpatient visit (HCPCS 99203). Source: CMS Medicare Physician & Other Practitioners file.