Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Mark Alan Immergut, MD
Urology Physician in Rockville, MD · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1770540056
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Registry record
Entity type Individual (Type 1)
Name Dr. Mark Alan Immergut
Credential MD
Sex Male
Practice address 6000 Executive Blvd, Suite 300, Rockville, MD, 20852
Phone (301) 468-8999
Enumeration date Apr 28, 2006
Last updated in NPPES Apr 26, 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 |
|---|---|---|---|
| 312564 | Other | MD | OPTIMUM CHOICE PROVIDER # |
| V746 0014 | Other | DC | BSDC |
| 0715414 | Other | MD | CIGNA PROVIDER NUMBER |
| 521186611 | Other | MD | UNITED HEALTHCARE PROV # |
| V746 0014 | Other | MD | BSMD |
| 312564 | Other | MD | MDIPA PROVIDER NUMBER |
| 312564 | Other | MD | MAMSI PROVIDER NUMBER |
| 312564 | Other | MD | ALLIANCE PROVIDER NUMBER |
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 Immergut?
Mark Immergut is registered in NPPES with the primary taxonomy of Urology 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
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-04-26.