Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mark S Greenberg, MD
Specialist in Irving, TX · enumerated 2005.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1033104666
See something wrong? Report a correction
Registry record
Entity type Individual (Type 1)
Name Mark S Greenberg
Credential MD
Sex Male
Practice address 400 W Lbj Fwy Ste 330, Irving, TX, 75063
Phone (972) 556-2885
Fax (972) 506-8733
Enumeration date Sep 20, 2005
Last updated in NPPES Jul 16, 2007
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 |
|---|---|---|---|
| MDH0399 | Other | TX | WK COMP |
| 89290B | Other | TX | BCBS OF 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
What is the NPI number for Mark Greenberg?
The National Provider Identifier (NPI) for Mark Greenberg is 1033104666, a Type 1 (individual) record in the CMS NPPES registry.
Where does Mark Greenberg practice?
The practice location on file with NPPES is in Irving, TX. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-16.