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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Marek Michal Lorenc, MD

Procedural Dermatology Physician in Santa Rosa, CA · enumerated 2006 · practices at Marek Michal Lorenc, M.D..

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

National Provider Identifier

1992813588

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Registry record

Entity type Individual (Type 1)
Name Dr. Marek Michal Lorenc
Credential MD
Sex Male
Practice address Santa Rosa, CA, 95403
Phone (707) 578-1900
Fax (707) 578-1111
Enumeration date Aug 25, 2006
Last updated in NPPES Sep 6, 2011

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207NS0135X Procedural Dermatology Physician Allopathic & Osteopathic Physicians · License G53057 (CA) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

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.

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Frequently asked questions

What is the NPI number for Marek Lorenc?
The National Provider Identifier (NPI) for Marek Lorenc is 1992813588, a Type 1 (individual) record in the CMS NPPES registry.
Where does Marek Lorenc practice?
The practice location on file with NPPES is in Santa Rosa, CA. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-09-06.