Karen Stewart, PSY. D
NPI 1952542136 · Clinical Psychologist · Santa Monica, CA
Enrolled with Medicare as Practitioner - Clinical Psychologist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karen Stewart, PSY. D is a Clinical Psychologist provider in Santa Monica, CA (NPI 1952542136).
Provider details
- NPI number
- 1952542136
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PSY. D
- Sex
- Female
- Sole proprietor
- Yes
- License
- PSY22580 (CA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
17 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
906 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) |
|---|---|---|
| Psychotherapy, 1 Hour90837 | 894 | $139 |
| Psychiatric Diagnostic Evaluation90791 | 12 | $159 |
Typical Medicare-allowed amounts for these services range $139–$159 (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
Registry dates
- Enumerated
- 2009-03-17
- Last updated
- 2020-03-11
- Certified
- 2020-03-11
Frequently asked questions
- What is Karen Stewart's NPI number?
- Karen Stewart's National Provider Identifier (NPI) is 1952542136, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Stewart's specialty?
- Karen Stewart is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is Karen Stewart located?
- Karen Stewart's practice location on file with NPPES is 3201 Wilshire Blvd, Santa Monica, CA 90403-2335.
- What is Karen Stewart's phone number?
- The practice phone number listed in the NPPES registry for Karen Stewart is (310) 477-6000.
- Does Karen Stewart accept Medicare?
- Karen Stewart is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karen Stewart's NPI active?
- Yes — Karen Stewart's NPI (1952542136) is active in the NPPES registry as of the last update on 2020-03-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.