IndividualActive
William Ernst, DDS
NPI 1255028072 · General Practice Dentistry · Sioux Falls, SD
William Ernst, DDS is a General Practice Dentistry provider in Sioux Falls, SD (NPI 1255028072).
Provider details
- NPI number
- 1255028072
- Entity type
- Individual
- Primary specialty
- General Practice DentistryDental Providers
- Credential
- DDS
- Sex
- Male
- Sole proprietor
- Yes
- License
- 41755 (TX)
Specialties & taxonomies
Dental Providers
Dental Providers
Profile Score
Established profile(58/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
3 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
4930 E 57th St
Sioux Falls, SD 57108-8705
Phone: (605) 202-5333
Street-level locationGet directions
Mailing address
3009 Treasure Hills Blvd
Harlingen, TX 78550-8656
Registry dates
- Enumerated
- 2023-04-20
- Last updated
- 2025-08-28
- Certified
- 2025-08-28
Frequently asked questions
- What is William Ernst's NPI number?
- William Ernst's National Provider Identifier (NPI) is 1255028072, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Ernst's specialty?
- William Ernst is listed in the NPPES registry with a primary specialty of General Practice Dentistry (Dental Providers).
- Where is William Ernst located?
- William Ernst's practice location on file with NPPES is 4930 E 57th St, Sioux Falls, SD 57108-8705.
- What is William Ernst's phone number?
- The practice phone number listed in the NPPES registry for William Ernst is (605) 202-5333.
- Is William Ernst's NPI active?
- Yes — William Ernst's NPI (1255028072) is active in the NPPES registry as of the last update on 2025-08-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.