William Alto, MD, MPH
NPI 1962478073 · Family Medicine Physician · Seattle, WA
William Alto, MD, MPH is a Family Medicine Physician provider in Seattle, WA (NPI 1962478073).
Provider details
- NPI number
- 1962478073
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, MPH
- Sex
- Male
- Sole proprietor
- No
- License
- 013896 (ME)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 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
- 2006-02-28
- Last updated
- 2023-09-07
Frequently asked questions
- What is William Alto's NPI number?
- William Alto's National Provider Identifier (NPI) is 1962478073, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Alto's specialty?
- William Alto is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William Alto located?
- William Alto's practice location on file with NPPES is 550 16th Ave, Seattle, WA 98122-5699.
- What is William Alto's phone number?
- The practice phone number listed in the NPPES registry for William Alto is (206) 320-2484.
- Is William Alto's NPI active?
- Yes — William Alto's NPI (1962478073) is active in the NPPES registry as of the last update on 2023-09-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.