Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Ronald J Diamond, MD
Psychiatry Physician in Madison, WI · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1336115591
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Registry record
Entity type Individual (Type 1)
Name Ronald J Diamond
Credential MD
Sex Male
Practice address 6001 Research Park Blvd, Madison, WI, 53719
Phone (608) 263-6100
Fax (608) 262-9246
Enumeration date Feb 27, 2006
Last updated in NPPES Feb 2, 2009
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 Ronald Diamond practice?
The practice location on file with NPPES is in Madison, WI. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Ronald Diamond?
The National Provider Identifier (NPI) for Ronald Diamond is 1336115591, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all → Timmons Hamrick Child & Adolescent Psychiatry Physician · Madison, WI NPI 1497747067 Kenneth Casey Sleep Medicine (Internal Medicine) Physician · Madison, WI NPI 1952384703 Marcia Slattery Child & Adolescent Psychiatry Physician · Madison, WI NPI 1851367916 Tracey Smith Psychologist · Madison, WI NPI 1023084282 Colette Girard Professional Counselor · Madison, WI NPI 1841266004 Roseanne Clark Psychologist · Madison, WI NPI 1639145790 Pauline Thome Psychologist · Madison, WI NPI 1548236607 Burr Eichelman Psychiatry Physician · Madison, WI NPI 1689640757
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-02-02.