Dr. Stephen A. Duff , DC
Chiropractor • Healdsburg, CA
Notice of NPI Deactivation & Inactive Practice Status
According to official public domain records published by CMS (Centers for Medicare & Medicaid Services) in the National Provider Identifier (NPPES) Registry, Dr. Stephen Duff has officially deactivated this NPI record and ceased active healthcare practice.
Professional Overview & Biography Verified Profile Summary
Dr. Stephen Duff, DC was a registered Chiropractor practicing in Healdsburg, CA. Throughout an active medical career spanning 18 years, Dr. Duff provided care at the practice location at 639 JOHNSON ST until profile deactivation on 2025-04-17.
Practice Location & Contact Primary Location
639 Johnson St
Healdsburg, CA 954483614
Specialty Benchmarks & Practice Insights
Comparative analytics for Chiropractor in Healdsburg, CA
Practicing in Healdsburg, CA (12100 Statewide)
In-Person Office Visits Only
Under CMS Medicare Fee Schedule vs Standard Submitted Charges
Medical Specialties & State Licenses
NUCC Taxonomy Code: 111N00000X
A provider qualified by a Doctor of Chiropractic (D.C.), licensed by the State and who practices chiropractic medicine -that discipline within the healing arts which deals with the nervous system and its relationship to the spinal column and its interrelationship with other body systems.
Career & Practice History Timeline
Chronological log of verified NPI updates, location relocations, credentials, and registry changes
Record deactivated on April 17, 2025
NPI status registered as active in NPPES database
Registered at 639 JOHNSON ST, HEALDSBURG, CA 954483614 (Tel: 7074337211)
Registered at 639 JOHNSON ST, HEALDSBURG, CA 954483614 (Tel: 7074337211)
Recorded as STEPHEN DUFF, D.C.
Chiropractor (License #DC10880 in CA)
First registered as active Individual Practitioner in NPPES Database.
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NPI Administrative Meta
Mailing Address
639 Johnson St
Healdsburg, CA 954483614
Phone: 7074337211
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