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John Harrow, PHD
NPI 1134887516 · Clinical Psychologist · Naperville, IL
John Harrow, PHD is a Clinical Psychologist provider in Naperville, IL (NPI 1134887516).
Provider details
- NPI number
- 1134887516
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PHD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 071.010658 (IL)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Established profile(61/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
4 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
400 E Diehl Rd Ste 440
Naperville, IL 60563-1358
Phone: (630) 225-9019
Fax: (844) 376-0919
Street-level locationGet directions
Mailing address
811 Addison Ave
Lombard, IL 60148-6509
Registry dates
- Enumerated
- 2021-12-02
- Last updated
- 2026-05-04
- Certified
- 2026-05-04
Frequently asked questions
- What is John Harrow's NPI number?
- John Harrow's National Provider Identifier (NPI) is 1134887516, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Harrow's specialty?
- John Harrow is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is John Harrow located?
- John Harrow's practice location on file with NPPES is 400 E Diehl Rd Ste 440, Naperville, IL 60563-1358.
- What is John Harrow's phone number?
- The practice phone number listed in the NPPES registry for John Harrow is (630) 225-9019.
- Is John Harrow's NPI active?
- Yes — John Harrow's NPI (1134887516) is active in the NPPES registry as of the last update on 2026-05-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.