Nicholas O'Riordan, PH. D.
NPI 1497859078 · Psychologist · Plainfield, IL
Enrolled with Medicare as Practitioner - Clinical Psychologist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nicholas O'Riordan, PH. D. is a Psychologist provider in Plainfield, IL (NPI 1497859078).
Provider details
- NPI number
- 1497859078
- Entity type
- Individual
- Primary specialty
- PsychologistBehavioral Health & Social Service Providers
- Credential
- PH. D.
- Sex
- Male
- Sole proprietor
- Yes
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
- 2006-09-12
- Last updated
- 2007-07-08
Frequently asked questions
- What is Nicholas O'Riordan's NPI number?
- Nicholas O'Riordan's National Provider Identifier (NPI) is 1497859078, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nicholas O'Riordan's specialty?
- Nicholas O'Riordan is listed in the NPPES registry with a primary specialty of Psychologist (Behavioral Health & Social Service Providers).
- Where is Nicholas O'Riordan located?
- Nicholas O'Riordan's practice location on file with NPPES is 1705 Sierra Highlands Ct, Plainfield, IL 60586-5934.
- What is Nicholas O'Riordan's phone number?
- The practice phone number listed in the NPPES registry for Nicholas O'Riordan is (815) 254-4555.
- Does Nicholas O'Riordan accept Medicare?
- Nicholas O'Riordan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nicholas O'Riordan's NPI active?
- Yes — Nicholas O'Riordan's NPI (1497859078) 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.