Alexandora Siporin
NPI 1285807990 · Pediatrics Physician · Ontario, CA
Enrolled with Medicare as Practitioner - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alexandora Siporin is a Pediatrics Physician provider in Ontario, CA (NPI 1285807990).
Provider details
- NPI number
- 1285807990
- Entity type
- Individual
- Primary specialty
- Pediatrics PhysicianAllopathic & Osteopathic Physicians
- Sex
- Female
- Sole proprietor
- No
- License
- 20A11828 (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
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
- 2008-04-02
- Last updated
- 2021-12-01
Frequently asked questions
- What is Alexandora Siporin's NPI number?
- Alexandora Siporin's National Provider Identifier (NPI) is 1285807990, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alexandora Siporin's specialty?
- Alexandora Siporin is listed in the NPPES registry with a primary specialty of Pediatrics Physician (Allopathic & Osteopathic Physicians).
- Where is Alexandora Siporin located?
- Alexandora Siporin's practice location on file with NPPES is 955 N Duesenberg Dr, Ontario, CA 91764-7913.
- What is Alexandora Siporin's phone number?
- The practice phone number listed in the NPPES registry for Alexandora Siporin is (505) 934-0860.
- Does Alexandora Siporin accept Medicare?
- Alexandora Siporin is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alexandora Siporin's NPI active?
- Yes — Alexandora Siporin's NPI (1285807990) is active in the NPPES registry as of the last update on 2021-12-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.