Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Mark A Dillingham, M.D.
Nephrology Physician in Denver, CO · enumerated 2005.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1437142734
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Registry record
Entity type Individual (Type 1)
Name Dr. Mark A Dillingham
Credential M.D.
Sex Male
Practice address 950 E Harvard Ave, Suite 240, Denver, CO, 80210
Phone (303) 871-0977
Fax (303) 733-2387
Enumeration date Aug 23, 2005
Last updated in NPPES Jun 20, 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 |
|---|---|---|---|
| 01232008 | 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
What specialty is Mark Dillingham?
Mark Dillingham is registered in NPPES with the primary taxonomy of Nephrology Physician. 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.
Other providers at this practice address
Browse all → Jay Krakovitz Internal Medicine Physician · Denver, CO NPI 1699778936 Colorado Infectious Disease Associates, LLP Infectious Disease Physician · Denver, CO NPI 1124023981 David Kleberger Family Nurse Practitioner · Denver, CO NPI 1386636439 Michael Persoff Nephrology Physician · Denver, CO NPI 1336132638 Richard Pluss Nephrology Physician · Denver, CO NPI 1245223544 Robert Eison Infectious Disease Physician · Denver, CO NPI 1215914767 Rupinder Singh Internal Medicine Physician · Denver, CO NPI 1336128131 Locke Keney Internal Medicine Physician · Denver, CO NPI 1245202506
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-06-20.