Dr. Douglas William Johnson, DDS
Dr. Douglas William Johnson is a General Practice Dentistry provider (Dentist) practicing in Upland, CA, registered in the NPPES registry with NPI 1790994580 since 2007. The credential DDS stands for Doctor of Dental Surgery. Practices at Nina Chan, M.D., Inc (listed at the same practice address in NPPES).
✓ Active NPI ✓ Valid NPI checksum Sole proprietor
| NPI | 1790994580 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Dr. Douglas William Johnson |
| Credential | DDS |
| Sex | Male |
| Practice address | Upland, CA, 91786 |
| Phone | 9099813341 |
| Fax | 9099858457 |
| Enumeration date | 2007-05-21 |
| Last updated in NPPES | 2007-07-08 |
Street address withheld — NPPES sole-proprietor addresses can be home addresses. See our data policy.
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 1223G0001X | General Practice Dentistry | Primary | 24124 | CA |
DDS — Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS credential
Copy-ready billing details
Provider: Douglas Johnson, DDS NPI: 1790994580 Taxonomy: 1223G0001X (General Practice Dentistry) Address: Upland, CA, 91786
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1205195021 | Nina Chan | Individual | Family Medicine Physician | Upland, CA |
| 1548778913 | Nina Chan, M.D., Inc | Organization | Family Medicine Physician | Upland, CA |
Verify this record
Cross-check NPI 1790994580 against the authoritative CMS record: view Dr. Douglas William Johnson on the official NPPES registry .
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. Read the full guide or validate an NPI number.
Frequently asked questions
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Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2007-07-08.