Mark Baker, PH.D
NPI 1528239506 · Psychologist · Pasadena, CA
Enrolled with Medicare as Practitioner - Clinical Psychologist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Baker, PH.D is a Psychologist provider in Pasadena, CA (NPI 1528239506).
Provider details
- NPI number
- 1528239506
- Entity type
- Individual
- Primary specialty
- PsychologistBehavioral Health & Social Service Providers
- Credential
- PH.D
- Sex
- Male
- Sole proprietor
- Yes
- License
- PSY 9219 (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
18 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
889 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 | 568 | $159 |
| Psychotherapy, 45 Minutes90834 | 321 | $108 |
Typical Medicare-allowed amounts for these services range $108–$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
- 2008-03-18
- Last updated
- 2008-03-18
Frequently asked questions
- What is Mark Baker's NPI number?
- Mark Baker's National Provider Identifier (NPI) is 1528239506, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Baker's specialty?
- Mark Baker is listed in the NPPES registry with a primary specialty of Psychologist (Behavioral Health & Social Service Providers).
- Where is Mark Baker located?
- Mark Baker's practice location on file with NPPES is 650 Sierra Madre Villa, Pasadena, CA 91107.
- What is Mark Baker's phone number?
- The practice phone number listed in the NPPES registry for Mark Baker is (626) 351-9616.
- Does Mark Baker accept Medicare?
- Mark Baker is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Baker's NPI active?
- Yes — Mark Baker's NPI (1528239506) is active in the NPPES registry as of the last update on 2008-03-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.