Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mark Colin Clark, M.D.
Specialist in Austin, TX · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1376568691
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Registry record
Entity type Individual (Type 1)
Name Mark Colin Clark
Credential M.D.
Sex Male
Practice address 1305 W 34th St, Ste 400, Austin, TX, 78705
Phone (512) 459-6599
Fax (512) 459-8496
Enumeration date Jul 13, 2006
Last updated in NPPES Mar 4, 2011
Taxonomy & licenses
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 |
|---|---|---|---|
| 137591707 | Medicaid | TX | - |
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
Is NPI 1376568691 active?
Yes, as of the latest NPPES snapshot, NPI 1376568691 is active (record last updated 2011-03-04).
How do I verify Mark Clark's NPI record?
Cross-check NPI 1376568691 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-03-04.