William Mertz, PHD
NPI 1639242340 · Clinical Child & Adolescent Psychologist · Akron, OH
William Mertz, PHD is a Clinical Child & Adolescent Psychologist provider in Akron, OH (NPI 1639242340).
Provider details
- NPI number
- 1639242340
- Entity type
- Individual
- Primary specialty
- Clinical Child & Adolescent PsychologistBehavioral Health & Social Service Providers
- Credential
- PHD
- Sex
- Male
- Sole proprietor
- No
- License
- 2380 (OH)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Behavioral Health & Social Service Providers
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
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
- 2006-11-17
- Last updated
- 2025-09-11
Frequently asked questions
- What is William Mertz's NPI number?
- William Mertz's National Provider Identifier (NPI) is 1639242340, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Mertz's specialty?
- William Mertz is listed in the NPPES registry with a primary specialty of Clinical Child & Adolescent Psychologist (Behavioral Health & Social Service Providers).
- Where is William Mertz located?
- William Mertz's practice location on file with NPPES is 312 Locust St, Akron, OH 44302-1801.
- What is William Mertz's phone number?
- The practice phone number listed in the NPPES registry for William Mertz is (330) 762-0591.
- Is William Mertz's NPI active?
- Yes — William Mertz's NPI (1639242340) is active in the NPPES registry as of the last update on 2025-09-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.