Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mark Scott Marshall, M.D.
Psychiatry Physician in Denver, CO · enumerated 2005.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1295735595
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Registry record
Entity type Individual (Type 1)
Name Mark Scott Marshall
Credential M.D.
Sex Male
Practice address 4455 E 12th Ave, Denver, CO, 80220
Phone (303) 504-7700
Enumeration date Jul 28, 2005
Last updated in NPPES Jan 6, 2016
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 |
|---|---|---|---|
| 01279553 | Medicaid | CO | - |
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 1295735595 active?
Yes, as of the latest NPPES snapshot, NPI 1295735595 is active (record last updated 2016-01-06).
How do I verify Mark Marshall's NPI record?
Cross-check NPI 1295735595 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
Browse all → Carmen Davila-Toro Psychiatry Physician · Denver, CO NPI 1962403931 Kristi Mock Clinical Social Worker · Denver, CO NPI 1790777886 Mental Health Center of Denver Pharmacy · Denver, CO NPI 1952394207 Terri Hamblen Clinical Social Worker · Denver, CO NPI 1265428767 Kimberly Maddux Clinical Social Worker · Denver, CO NPI 1245201839 Richard Neville Professional Counselor · Denver, CO NPI 1013978337 Catherine Manley Professional Counselor · Denver, CO NPI 1821059007 William Latimer Professional Counselor · Denver, CO NPI 1629030069
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-01-06.