Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Caleb P Nelson, M.D.
Urology Physician in Baltimore, MD · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1487676003
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Registry record
Entity type Individual (Type 1)
Name Caleb P Nelson
Credential M.D.
Sex Male
Practice address 149 Johns Hopkins Hospital Marburg, 600 North Wolfe Street, Baltimore, MD, 21287
Phone (410) 955-5358
Enumeration date Jul 24, 2006
Last updated in NPPES Sep 23, 2011
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 Caleb Nelson practice?
The practice location on file with NPPES is in Baltimore, MD. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Caleb Nelson?
The National Provider Identifier (NPI) for Caleb Nelson is 1487676003, a Type 1 (individual) record in the CMS NPPES registry.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-09-23.