Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Robert J Willis, M.D.
Pediatrics Physician in Ludlow, MA · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1164506184
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Registry record
Entity type Individual (Type 1)
Name Robert J Willis
Credential M.D.
Sex Male
Practice address 77 Winsor St, Suite # 104, Ludlow, MA, 01056
Phone (413) 589-9494
Enumeration date Oct 25, 2006
Last updated in NPPES Nov 30, 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
How do I verify Robert Willis's NPI record?
Cross-check NPI 1164506184 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1164506184 active?
Yes, as of the latest NPPES snapshot, NPI 1164506184 is active (record last updated 2011-11-30).
Other providers at this practice address
Browse all → Sarah Clayton Social Worker · Ludlow, MA NPI 1942297957 Anne Martin Social Worker · Ludlow, MA NPI 1194712067 Paul Blomerth Neurology Chiropractor · Ludlow, MA NPI 1184604555 William Axton Podiatrist · Ludlow, MA NPI 1396828489 Hampden Podiatry Associates Podiatrist · Ludlow, MA NPI 1437233384 John Vomero Foot Surgery Podiatrist · Ludlow, MA NPI 1871641902 Hampden Podiatry Associates Foot Surgery Podiatrist · Ludlow, MA NPI 1538212352 Ludlow Pediatrics, Inc. Pediatric Adolescent Medicine Physician · Ludlow, MA NPI 1932245131
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-11-30.