William Lyons
NPI 1578638169 · Mental Health Counselor · San Francisco, CA
William Lyons is a Mental Health Counselor provider in San Francisco, CA (NPI 1578638169).
Provider details
- NPI number
- 1578638169
- Entity type
- Individual
- Primary specialty
- Mental Health CounselorBehavioral Health & Social Service Providers
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Behavioral Health & Social Service 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
83% 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
- 2006-11-21
- Last updated
- 2007-07-08
Frequently asked questions
- What is William Lyons's NPI number?
- William Lyons's National Provider Identifier (NPI) is 1578638169, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Lyons's specialty?
- William Lyons is listed in the NPPES registry with a primary specialty of Mental Health Counselor (Behavioral Health & Social Service Providers).
- Where is William Lyons located?
- William Lyons's practice location on file with NPPES is 1385 Mission St, San Francisco, CA 94103-2623.
- What is William Lyons's phone number?
- The practice phone number listed in the NPPES registry for William Lyons is (415) 864-4002.
- Is William Lyons's NPI active?
- Yes — William Lyons's NPI (1578638169) 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.