Gadson Johnson, M.D.
NPI 1578767232 · Psychiatry Physician · Santa Monica, CA
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gadson Johnson, M.D. is a Psychiatry Physician provider in Santa Monica, CA (NPI 1578767232).
Provider details
- NPI number
- 1578767232
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- A100422 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
15,374 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) |
|---|---|---|
| Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231 | 9,510 | $47 |
| Psychotherapy With Evaluation and Management Visit, 30 Minutes90833 | 3,224 | $61 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 1,054 | $76 |
| Psychiatric Diagnostic Evaluation With Medical Services90792 | 851 | $162 |
| Hospital Discharge Day Management, 30 Minutes Or Less99238 | 374 | $79 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 233 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 57 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Divalproex Sodium | 1,134 | 172 |
| Quetiapine Fumarate | 970 | 142 |
| Risperidone | 747 | 134 |
| Olanzapine | 595 | 108 |
| Olanzapinebrand: Olanzapine Odt | 478 | 89 |
| Mirtazapine | 328 | 63 |
| Sertraline Hcl | 298 | 63 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-06-14
- Last updated
- 2012-03-01
Frequently asked questions
- What is Gadson Johnson's NPI number?
- Gadson Johnson's National Provider Identifier (NPI) is 1578767232, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gadson Johnson's specialty?
- Gadson Johnson is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Gadson Johnson located?
- Gadson Johnson's practice location on file with NPPES is 701 Santa Monica Blvd, Santa Monica, CA 90401-2623.
- What is Gadson Johnson's phone number?
- The practice phone number listed in the NPPES registry for Gadson Johnson is (310) 993-4103.
- Does Gadson Johnson accept Medicare?
- Gadson Johnson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gadson Johnson's NPI active?
- Yes — Gadson Johnson's NPI (1578767232) is active in the NPPES registry as of the last update on 2012-03-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.