Benjamin Joseph Karsten, MD
Benjamin Joseph Karsten is a Surgery Physician provider (Surgery) practicing in Boise, ID, registered in the NPPES registry with NPI 1124227137 since 2007. The credential MD stands for Doctor of Medicine. Practices at L. William D. Nowierski, M.D. PA (listed at the same practice address in NPPES).
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1124227137 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Benjamin Joseph Karsten |
| Credential | MD |
| Sex | Male |
| Practice address | 100 WARM SPRINGS AVE, STE B, Boise, ID, 83712 |
| Phone | 2083812222 |
| Enumeration date | 2007-07-11 |
| Last updated in NPPES | 2016-03-03 |
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 208600000X | Surgery Physician | Secondary | A92800 | CA |
| 208600000X | Surgery Physician | Primary | M11376 | ID |
MD — Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential
Copy-ready billing details
Provider: Benjamin Karsten, MD NPI: 1124227137 Taxonomy: 208600000X (Surgery Physician) Address: 100 WARM SPRINGS AVE, STE B, Boise, ID, 83712
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1699774042 | J. Chris Kantarian | Individual | Colon & Rectal Surgery Physician | Boise, ID |
| 1790737591 | Renee Bourquard | Individual | Surgery Physician | Boise, ID |
| 1376610048 | Leon Nowierski | Individual | Dermatology Physician | Boise, ID |
| 1710166004 | L. William D. Nowierski, M.D. PA | Organization | Medical Specialty Clinic/Center | Boise, ID |
Verify this record
Cross-check NPI 1124227137 against the authoritative CMS record: view Benjamin Joseph Karsten on the official NPPES registry .
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes — even if the provider moves or changes specialty. Read the full guide or validate an NPI number.
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Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2016-03-03.