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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

L. Ross Clark, M.D.

Psychiatry Physician in Redding, CA · enumerated 2005 · practices at Dept. of Veteran'S Affairs.

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

National Provider Identifier

1356324941

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Registry record

Entity type Individual (Type 1)
Name L. Ross Clark
Credential M.D.
Sex Male
Practice address 351 Hartnell Ave, Redding Vaopc, Redding, CA, 96002
Phone (530) 226-7675
Enumeration date Nov 28, 2005
Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License G38671 (CA) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier Type State Issuer
G38671 Other CA STATE MEDICAL LICENSE

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

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.
What specialty is L. Clark?
L. Clark is registered in NPPES with the primary taxonomy of Psychiatry Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.