NPI Portal NPI Lookup & Verification

Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Marek Michal Lorenc, M.D.

Procedural Dermatology Physician in Santa Rosa, CA · enumerated 2008 · authorized official Marek Lorenc, Sole Proprietor/Owner.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1275718108

Verified

See something wrong? Report a correction

Registry record

Entity type Organization (Type 2)
Legal business name Marek Michal Lorenc, M.D.
Other name <Unavail>
Practice address 3562 Round Barn Cir, Suite 320, Santa Rosa, CA, 95403
Phone (707) 578-1900
Fax (707) 578-1111
Enumeration date Jan 9, 2008
Last updated in NPPES Jul 5, 2011

Taxonomy & classification

207NS0135X Procedural Dermatology Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Marek Lorenc
Title Sole Proprietor/Owner
Phone (707) 578-1900

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 → Validate an NPI →

Frequently asked questions

What is the NPI number for Marek Michal Lorenc, M.D.?
The NPI for Marek Michal Lorenc, M.D. is 1275718108, a Type 2 (organization) record in the CMS NPPES registry.
Who is the authorized official for Marek Michal Lorenc, M.D.?
NPPES lists Marek Lorenc (Sole Proprietor/Owner) as the authorized official for this organization.

Providers at this address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-07-05.