Irene Koolwijk, M.D.
NPI 1518164706 · Developmental - Behavioral Pediatrics Physician · Los Angeles, CA
Enrolled with Medicare as Practitioner - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Irene Koolwijk, M.D. is a Developmental - Behavioral Pediatrics Physician provider in Los Angeles, CA (NPI 1518164706).
Provider details
- NPI number
- 1518164706
- Entity type
- Individual
- Primary specialty
- Developmental - Behavioral Pediatrics PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- A121627 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
18 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
- 2007-06-29
- Last updated
- 2021-04-26
- Certified
- 2021-04-26
Frequently asked questions
- What is Irene Koolwijk's NPI number?
- Irene Koolwijk's National Provider Identifier (NPI) is 1518164706, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Irene Koolwijk's specialty?
- Irene Koolwijk is listed in the NPPES registry with a primary specialty of Developmental - Behavioral Pediatrics Physician (Allopathic & Osteopathic Physicians).
- Where is Irene Koolwijk located?
- Irene Koolwijk's practice location on file with NPPES is 300 Ucla Medical Plz Ste 3300, Los Angeles, CA 90095-6062.
- What is Irene Koolwijk's phone number?
- The practice phone number listed in the NPPES registry for Irene Koolwijk is (310) 825-0867.
- Does Irene Koolwijk accept Medicare?
- Irene Koolwijk is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Irene Koolwijk's NPI active?
- Yes — Irene Koolwijk's NPI (1518164706) is active in the NPPES registry as of the last update on 2021-04-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.