Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Richard David Johnson, PHD
Psychologist in Chester, IL · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1588699847
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Registry record
Entity type Individual (Type 1)
Name Richard David Johnson
Credential PHD
Sex Male
Practice address 1315 Lehmen Dr, Chester Mental Health Center, Chester, IL, 62233
Phone (618) 826-4571
Fax (618) 826-3229
Enumeration date Jul 12, 2006
Last updated in NPPES Jul 9, 2007
Taxonomy & licenses
PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers.
About the PHD 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
Is NPI 1588699847 active?
Yes, as of the latest NPPES snapshot, NPI 1588699847 is active (record last updated 2007-07-09).
How do I verify Richard Johnson's NPI record?
Cross-check NPI 1588699847 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Other providers at this practice address
Browse all → Nageswararao Vallabhaneni Psychiatry Physician · Chester, IL NPI 1215925656 Alan Felthous Psychiatry Physician · Chester, IL NPI 1164410502 Illinois Department of Human Services Psychiatric Hospital · Chester, IL NPI 1306834726 Prithviraj Thakur Psychiatry Physician · Chester, IL NPI 1801884226 Prem Dua Pediatrics Physician · Chester, IL NPI 1952399396 Marie-Ange Sainvilus Obstetrics & Gynecology Physician · Chester, IL NPI 1083602072 Dorothy Zajac Internal Medicine Physician · Chester, IL NPI 1972592210 Susan Carr Family Medicine Physician · Chester, IL NPI 1982693925
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-09.