John Largen, PHD
NPI 1265425466 · Clinical Neuropsychologist · Houston, TX
Enrolled with Medicare as Practitioner - Clinical Psychologist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Largen, PHD is a Clinical Neuropsychologist provider in Houston, TX (NPI 1265425466).
Provider details
- NPI number
- 1265425466
- Entity type
- Individual
- Primary specialty
- Clinical NeuropsychologistBehavioral Health & Social Service Providers
- Credential
- PHD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 22321 (TX)
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
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
- 2005-08-24
- Last updated
- 2007-08-28
Frequently asked questions
- What is John Largen's NPI number?
- John Largen's National Provider Identifier (NPI) is 1265425466, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Largen's specialty?
- John Largen is listed in the NPPES registry with a primary specialty of Clinical Neuropsychologist (Behavioral Health & Social Service Providers).
- Where is John Largen located?
- John Largen's practice location on file with NPPES is 1020 Holcombe Blvd, Houston, TX 77030-2210.
- What is John Largen's phone number?
- The practice phone number listed in the NPPES registry for John Largen is (713) 799-2818.
- Does John Largen accept Medicare?
- John Largen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Largen's NPI active?
- Yes — John Largen's NPI (1265425466) is active in the NPPES registry as of the last update on 2007-08-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.