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Tonja Diffner, RDH
NPI 1831602671 · Dental Hygienist · Federal Way, WA
Tonja Diffner, RDH is a Dental Hygienist provider in Federal Way, WA (NPI 1831602671).
Provider details
- NPI number
- 1831602671
- Entity type
- Individual
- Primary specialty
- Dental HygienistDental Providers
- Credential
- RDH
- Sex
- Female
- Sole proprietor
- Yes
- License
- DH60140200 (WA)
Specialties & taxonomies
Dental Providers
Profile Score
Established profile(69/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
8 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
33919 9th Ave S Ste 1
Federal Way, WA 98003-6724
Phone: (206) 780-6908
Street-level locationGet directions
Mailing address
2133 N 172nd St
Shoreline, WA 98133-5511
Registry dates
- Enumerated
- 2017-11-15
- Last updated
- 2017-11-15
Frequently asked questions
- What is Tonja Diffner's NPI number?
- Tonja Diffner's National Provider Identifier (NPI) is 1831602671, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tonja Diffner's specialty?
- Tonja Diffner is listed in the NPPES registry with a primary specialty of Dental Hygienist (Dental Providers).
- Where is Tonja Diffner located?
- Tonja Diffner's practice location on file with NPPES is 33919 9th Ave S Ste 1, Federal Way, WA 98003-6724.
- What is Tonja Diffner's phone number?
- The practice phone number listed in the NPPES registry for Tonja Diffner is (206) 780-6908.
- Is Tonja Diffner's NPI active?
- Yes — Tonja Diffner's NPI (1831602671) is active in the NPPES registry as of the last update on 2017-11-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.