Marie Jelonek, MD
NPI 1730250796 · Pediatrics Physician · Fontana, CA
Enrolled with Medicare as Practitioner - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marie Jelonek, MD is a Pediatrics Physician provider in Fontana, CA (NPI 1730250796).
Provider details
- NPI number
- 1730250796
- Entity type
- Individual
- Primary specialty
- Pediatrics PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- G68751 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
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
- 2006-11-13
- Last updated
- 2008-09-23
Frequently asked questions
- What is Marie Jelonek's NPI number?
- Marie Jelonek's National Provider Identifier (NPI) is 1730250796, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marie Jelonek's specialty?
- Marie Jelonek is listed in the NPPES registry with a primary specialty of Pediatrics Physician (Allopathic & Osteopathic Physicians).
- Where is Marie Jelonek located?
- Marie Jelonek's practice location on file with NPPES is 9961 Sierra Ave, Fontana, CA 92335-6720.
- What is Marie Jelonek's phone number?
- The practice phone number listed in the NPPES registry for Marie Jelonek is (909) 427-3910.
- Does Marie Jelonek accept Medicare?
- Marie Jelonek is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marie Jelonek's NPI active?
- Yes — Marie Jelonek's NPI (1730250796) is active in the NPPES registry as of the last update on 2008-09-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.