Mark Horowitz Do, Inc.
Mark Horowitz Do, Inc. is a healthcare organization registered as Dermatology Physician in Torrance, CA, holding Type 2 (organization) NPI 1952497414 since 2006. The authorized official on file is Mark Horowitz, Owner.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1952497414 |
|---|---|
| Entity type | Organization (Type 2) |
| Legal business name | Mark Horowitz Do, Inc. |
| Practice address | 23550 HAWTHORNE BLVD STE 200, Torrance, CA, 90505 |
| Phone | 3103732636 |
| Enumeration date | 2006-10-04 |
| Last updated in NPPES | 2011-05-23 |
Authorized official
| Name | Mark Horowitz |
|---|---|
| Title | Owner |
| Phone | 3103732636 |
Taxonomy & classification
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 207NI0002X | Clinical & Laboratory Dermatological Immunology Physician | Secondary | 20A7642 | CA |
| 207ND0900X | Dermatopathology Physician | Secondary | 20A7642 | CA |
| 207ND0101X | MOHS-Micrographic Surgery Physician | Secondary | 20A7642 | CA |
| 207NP0225X | Pediatric Dermatology Physician | Secondary | 20A7642 | CA |
| 207NS0135X | Procedural Dermatology Physician | Secondary | 20A7642 | CA |
| 207N00000X | Dermatology Physician | Primary | 20A7642 | CA |
Copy-ready billing details
Provider: Mark Horowitz Do, Inc. NPI: 1952497414 Taxonomy: 207N00000X (Dermatology Physician) Address: 23550 HAWTHORNE BLVD STE 200, Torrance, CA, 90505
Providers at this address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1669413878 | Mark Horowitz | Individual | Dermatology Physician | Torrance, CA |
| 1285675538 | David Horowitz | Individual | Dermatology Physician | Torrance, CA |
| 1740567981 | Michael Kassardjian | Individual | Dermatology Physician | Torrance, CA |
| 1316204936 | Divya Sachdev | Individual | Dermatology Physician | Torrance, CA |
Verify this record
Cross-check NPI 1952497414 against the authoritative CMS record: view Mark Horowitz Do, Inc. 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.
Frequently asked questions
What is the NPI number for Mark Horowitz Do, Inc.?
Who is the authorized official for Mark Horowitz Do, Inc.?
Source: CMS NPPES (public data). Snapshot 2026-07-10. Provider record last updated 2011-05-23.