Karen Koser, MD
NPI 1861703787 · Developmental - Behavioral Pediatrics Physician · Los Angeles, CA
Enrolled with Medicare as Practitioner - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karen Koser, MD is a Developmental - Behavioral Pediatrics Physician provider in Los Angeles, CA (NPI 1861703787).
Provider details
- NPI number
- 1861703787
- Entity type
- Individual
- Primary specialty
- Developmental - Behavioral Pediatrics PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 264944 (NY)
Specialties & taxonomies
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
15 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
- 2010-06-24
- Last updated
- 2023-01-19
Frequently asked questions
- What is Karen Koser's NPI number?
- Karen Koser's National Provider Identifier (NPI) is 1861703787, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Koser's specialty?
- Karen Koser is listed in the NPPES registry with a primary specialty of Developmental - Behavioral Pediatrics Physician (Allopathic & Osteopathic Physicians).
- Where is Karen Koser located?
- Karen Koser's practice location on file with NPPES is Children'S Hospital of Los Angeles, Los Angeles, CA 90027.
- What is Karen Koser's phone number?
- The practice phone number listed in the NPPES registry for Karen Koser is (323) 361-3849.
- Does Karen Koser accept Medicare?
- Karen Koser is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karen Koser's NPI active?
- Yes — Karen Koser's NPI (1861703787) is active in the NPPES registry as of the last update on 2023-01-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.