Individual provider · Type 1 NPI
Karin Bertha Duff
Hearing Instrument Specialist · Vallejo, CA
NPI number
1326973371
Active
Practice location
480 Redwood St Ste 14
Vallejo, CA 94590-2958
Fax (707) 642-8815
Mailing address
1904 Rollingwood Dr
Fairfield, CA 94534-7932
Other practice locations
- 1700 Pennsylvania Ave Ste B, Fairfield, CA 94533-3510 · (707) 426-4327
Specialties and licenses
| Taxonomy | Code | License |
|---|---|---|
| Hearing Instrument Specialist Primary | 237700000X | HA7368 (CA) |
Hearing Instrument Specialist: Individuals who test hearing for the selection, adaptation, fitting, adjusting, servicing, and sale of hearing aids. Hearing Instrument Specialist is a designation provided individuals who qualify by the National Hearing Aid Society
Another provider at this address
Other hearing instrument specialist providers in Vallejo
About NPI 1326973371
Karin Bertha Duff's National Provider Identifier is 1326973371, issued on Jun 12, 2026. The primary taxonomy on file is Hearing Instrument Specialist (237700000X), and the practice location is in Vallejo, CA. The record was last updated on Jun 12, 2026.