Doctor profile · Federal record
Dr. Joshua Koh, M.D.
Psychiatry Physician (CMS: Psychiatry) · San Dimas, CA
- NPI 1871609271
- Accepts Medicare
- MIPS 0.0 / 100 · 2023
- 41 yrs in practice
- Male
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
1173 N Dixie Dr, Suite 101
San Dimas, CA 917731200
(909) 599-4422
fax (909) 599-5577 - Mailing address
-
2058 N Mills Ave, #518
Claremont, CA 917112812
Credentials & registration
- NPI registered
- August 2006 — 20 yrs on file
- Profile last updated
- March 7, 2023
- Year of graduation
- 1985 — 41 yrs since
- Specialty taxonomy
- 2084P0800X — NUCC code
- State license (1)
- California #A50936
- Medicaid
- CA #00A509360
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1871609271. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
8,064
Distinct HCPCS
7
Medicare allowed
$711,868
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99308 |
Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 15 minutes | 5,996 | 1,306 | $79 | |
99306 |
Initial nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes | 793 | 781 | $192 | |
99307 |
Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 10 minutes | 413 | 102 | $42 | |
99348 |
Residence visit for established patient with low level of medical decision making, per day, if using time, at least 30 minutes | 402 | 139 | $79 | |
99347 |
Residence visit for established patient with straightforward medical decision making, per day, if using time, at least 15 minutes | 303 | 144 | $46 | |
90792 |
Psychiatric diagnostic evaluation with medical services | 98 | 97 | $178 | |
99309 |
Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes | 59 | 50 | $113 |
In context: peer comparison
Among 1 peers in this city , average services per provider: 1,152. This provider delivers 7.0× the peer median.Open Payments
Industry payments received
All-time total
$441
Transactions
15
Manufacturers
4
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| ACADIA Pharmaceuticals Inc | 10 | $199.70 | |
| E.R. Squibb & Sons, L.L.C. | 1 | $124.36 | |
| Teva Pharmaceuticals USA, Inc. | 3 | $91.47 | |
| Otsuka America Pharmaceutical, Inc. | 1 | $25.22 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
2,020
Patients
273
Total drug cost
$89,276
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Divalproex Sodium | Generic | 284 | 39 | $20,750 |
| Quetiapine Fumarate | Generic | 234 | 30 | $4,883 |
| Olanzapine | Generic | 213 | 31 | $8,558 |
| Risperidone | Generic | 199 | 27 | $3,112 |
| Aripiprazole | Generic | 172 | 27 | $25,973 |
| Mirtazapine | Generic | 149 | 28 | $3,722 |
| Sertraline Hcl | Generic | 136 | 25 | $2,541 |
| Clonazepam | Generic | 108 | 14 | $847 |
| Divalproex Sodium Er (Divalproex Sodium) | Brand | 93 | 12 | $8,785 |
| Clozapine | Generic | 87 | 0 | $4,562 |
Frequently asked questions
What is Dr. Joshua Koh's medical specialty?
Dr. Joshua Koh practices Psychiatry Physician in San Dimas, CA.
Where does Dr. Joshua Koh practice?
Dr. Joshua Koh practices at 1173 N Dixie Dr, San Dimas, CA 917731200. Office phone: 9095994422.
What is Dr. Joshua Koh's NPI?
Dr. Joshua Koh's National Provider Identifier (NPI) is 1871609271, issued by NPPES.
Does Dr. Joshua Koh accept Medicare assignment?
Yes. Dr. Joshua Koh accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Joshua Koh commonly perform?
Top Medicare-reported procedures in 2023: Subsequent nursing facility care with straightforward level of medical decision making (HCPCS 99308); Initial nursing facility care with high level of medical decision making (HCPCS 99306); Subsequent nursing facility care with straightforward level of medical decision making (HCPCS 99307). Source: CMS Medicare Physician & Other Practitioners file.