Office listed in NPPES
23101 Sherman Pl, #500, West Hills, CA 91307
8186764802
Confirm this address and number with the practice. Registry information may be outdated.
Physician registry profile
Caleb Warren Hirsch
MD · West Hills, CA
Record details
- NPI
- 1619976800
- Registry updated
- 10/08/2012
- Imported
- 2026-11-03
- Registry specialty labels (English)
- Internal Medicine
Before arranging a visit
Confirm current services, ages treated, insurance, location, hospital affiliations and appointment availability directly with the practice. An active NPI does not verify current licensure, certification or practice status.
A registry specialty label does not establish that a clinician currently provides the particular care you need.
Documented Medicare service activity
Reporting year: 2024. These are billed services or units in Original Medicare Part B, not total career experience, all patients, surgical case counts or a quality rating.
Scroll the table sideways to see every column.
| HCPCS | Billed services / units | Beneficiaries in this row | Service description (English) | Billing setting |
|---|---|---|---|---|
| 99223 | 329 | 258 | Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | Facility |
| 99232 | 1,500 | 219 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | Facility |
| 99238 | 285 | 224 | Hospital discharge day management, 30 minutes or less | Facility |
| 99306 | 57 | 49 | Initial nursing facility care with high level of medical decision making, per day, if using time, 50 minutes or more | Facility |
| 99308 | 435 | 60 | Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more | Facility |
How to interpret these counts
CMS suppresses provider/service rows involving fewer than 11 beneficiaries. Services may repeat for one person, and beneficiaries cannot be added across rows. Facility/non-facility describes billing and does not establish a current hospital affiliation. These counts do not report case complexity, clinical outcomes or whether a treatment is appropriate for you.
Exact CMS source rows for this NPI · Checked 2026-11-03