Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Marshall Howard Corren, M.D.
Specialist in Los Angeles, CA · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1992731830
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Registry record
Entity type Individual (Type 1)
Name Dr. Marshall Howard Corren
Credential M.D.
Sex Male
Practice address 1828 S Western Ave, #10, Los Angeles, CA, 90006
Phone (323) 730-0310
Fax (323) 730-1335
Enumeration date Jun 23, 2006
Last updated in NPPES Jul 9, 2007
Taxonomy & licenses
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.
Frequently asked questions
What specialty is Marshall Corren?
Marshall Corren is registered in NPPES with the primary taxonomy of Specialist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-09.