Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Ralph Lynn Petrilli, M.D.
Specialist in Longmont, CO · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1558303891
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Registry record
Entity type Individual (Type 1)
Name Ralph Lynn Petrilli
Credential M.D.
Sex Male
Practice address 1181 Wyndemere Cir, Longmont, CO, 80501
Phone (303) 651-5111
Enumeration date Jun 12, 2006
Last updated in NPPES Sep 16, 2016
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
Where does Ralph Petrilli practice?
The practice location on file with NPPES is in Longmont, CO. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Ralph Petrilli?
The National Provider Identifier (NPI) for Ralph Petrilli is 1558303891, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-09-16.