Mariko Karres, RN, NP
NPI 1538211644 · Women's Health Nurse Practitioner · Encinitas, CA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mariko Karres, RN, NP is a Women's Health Nurse Practitioner provider in Encinitas, CA (NPI 1538211644).
Provider details
- NPI number
- 1538211644
- Entity type
- Individual
- Primary specialty
- Women's Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- RN, NP
- Sex
- Female
- Sole proprietor
- No
- License
- NPF14643 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
872 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 394 | $14 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 292 | $117 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 166 | $163 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 20 | $198 |
Typical Medicare-allowed amounts for these services range $14–$198 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Additional practice locations (1)
- 10710 N Torrey Pines RdLa Jolla, CA 92037-1035Phone: (858) 554-8984
Registry dates
- Enumerated
- 2007-01-17
- Last updated
- 2022-09-12
- Certified
- 2022-09-12
Frequently asked questions
- What is Mariko Karres's NPI number?
- Mariko Karres's National Provider Identifier (NPI) is 1538211644, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mariko Karres's specialty?
- Mariko Karres is listed in the NPPES registry with a primary specialty of Women's Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Mariko Karres located?
- Mariko Karres's practice location on file with NPPES is 320 Santa Fe Dr Ste 300, Encinitas, CA 92024-5140.
- What is Mariko Karres's phone number?
- The practice phone number listed in the NPPES registry for Mariko Karres is (760) 901-5200.
- Does Mariko Karres accept Medicare?
- Mariko Karres is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mariko Karres's NPI active?
- Yes — Mariko Karres's NPI (1538211644) is active in the NPPES registry as of the last update on 2022-09-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.