William Mastorakos, DDS MS
NPI 1063527604 · Orthodontics and Dentofacial Orthopedics Dentistry · St Louis, MO
William Mastorakos, DDS MS is a Orthodontics and Dentofacial Orthopedics Dentistry provider in St Louis, MO (NPI 1063527604).
Provider details
- NPI number
- 1063527604
- Entity type
- Individual
- Primary specialty
- Orthodontics and Dentofacial Orthopedics DentistryDental Providers
- Credential
- DDS MS
- Sex
- Male
- Sole proprietor
- No
- License
- 013600 (MO)
Specialties & taxonomies
Dental Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 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
Mailing address
Registry dates
- Enumerated
- 2006-08-21
- Last updated
- 2007-07-08
Frequently asked questions
- What is William Mastorakos's NPI number?
- William Mastorakos's National Provider Identifier (NPI) is 1063527604, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Mastorakos's specialty?
- William Mastorakos is listed in the NPPES registry with a primary specialty of Orthodontics and Dentofacial Orthopedics Dentistry (Dental Providers).
- Where is William Mastorakos located?
- William Mastorakos's practice location on file with NPPES is 10115 Manchester Rd, St Louis, MO 63122.
- What is William Mastorakos's phone number?
- The practice phone number listed in the NPPES registry for William Mastorakos is (314) 966-4117.
- Is William Mastorakos's NPI active?
- Yes — William Mastorakos's NPI (1063527604) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.