Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. John A Grossman, M.D.
Specialist in Denver, CO · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1609830090
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Registry record
Entity type Individual (Type 1)
Name Dr. John A Grossman
Credential M.D.
Sex Male
Practice address 4600 Hale Pkwy, Suite 100, Denver, CO, 80220
Phone (303) 320-5566
Fax (303) 320-1453
Enumeration date Apr 13, 2006
Last updated in NPPES Jul 9, 2007
Taxonomy & licenses
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure.
About the MD credential
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 John Grossman?
The National Provider Identifier (NPI) for John Grossman is 1609830090, a Type 1 (individual) record in the CMS NPPES registry.
Where does John Grossman practice?
The practice location on file with NPPES is in Denver, CO. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-09.