Doctor profile · Federal record
Dr. Gadson Johnson, M.D.
Psychiatry Physician (CMS: Psychiatry) · Santa Monica, CA
- NPI 1578767232
- Accepts Medicare
- MIPS 5.4 / 100 · 2023
- 21 yrs in practice
- Male
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
701 Santa Monica Blvd, Suite 230
Santa Monica, CA 904012623
(310) 993-4103
Credentials & registration
- NPI registered
- June 2007 — 19 yrs on file
- Profile last updated
- March 1, 2012
- Year of graduation
- 2005 — 21 yrs since
- Specialty taxonomy
- 2084P0800X — NUCC code
- State license (1)
- California #A100422
- Medicaid
- CA #00A100422
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1578767232. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
13,923
Distinct HCPCS
10
Medicare allowed
$944,972
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99231 |
Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes | 8,112 | 968 | $52 | |
90833 |
Psychotherapy with evaluation and management visit, 30 minutes | 3,028 | 547 | $64 | |
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 1,405 | 492 | $83 | |
90792 |
Psychiatric diagnostic evaluation with medical services | 812 | 628 | $179 | |
99233 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 150 | 99 | $124 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 142 | 136 | $137 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 93 | 93 | $182 | |
99347 |
Residence visit for established patient with straightforward medical decision making, per day, if using time, at least 15 minutes | 62 | 47 | $47 | |
90833 |
Psychotherapy with evaluation and management visit, 30 minutes | 56 | 40 | $73 | |
99238 |
Hospital discharge day management, 30 minutes or less | 33 | 32 | $86 |
In context: peer comparison
Among 5 peers in Santa Monica Psychiatry Physician, average services per provider: 687. This provider delivers 20× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
6,552
Patients
1,239
Total drug cost
$360,482
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Divalproex Sodium | Generic | 1,027 | 168 | $54,749 |
| Quetiapine Fumarate | Generic | 901 | 148 | $37,571 |
| Risperidone | Generic | 826 | 176 | $16,721 |
| Olanzapine | Generic | 612 | 125 | $30,393 |
| Olanzapine Odt (Olanzapine) | Brand | 500 | 111 | $87,381 |
| Benztropine Mesylate | Generic | 366 | 71 | $5,776 |
| Trazodone Hcl | Generic | 303 | 68 | $3,896 |
| Mirtazapine | Generic | 300 | 59 | $7,570 |
| Sertraline Hcl | Generic | 289 | 57 | $2,651 |
| Haloperidol | Generic | 276 | 51 | $12,427 |
Hospital affiliations
Frequently asked questions
What is Dr. Gadson Johnson's medical specialty?
Dr. Gadson Johnson practices Psychiatry Physician in Santa Monica, CA.
Where does Dr. Gadson Johnson practice?
Dr. Gadson Johnson practices at 701 Santa Monica Blvd, Santa Monica, CA 904012623. Office phone: 3109934103.
What is Dr. Gadson Johnson's NPI?
Dr. Gadson Johnson's National Provider Identifier (NPI) is 1578767232, issued by NPPES.
Does Dr. Gadson Johnson accept Medicare assignment?
Yes. Dr. Gadson Johnson accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Gadson Johnson commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with straightforward or low level of medical decision making (HCPCS 99231); Psychotherapy with evaluation and management visit (HCPCS 90833); Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232). Source: CMS Medicare Physician & Other Practitioners file.