Ian Best, M.D.
NPI 1659359248 · Pediatrics Physician · Marseilles, IL
Enrolled with Medicare as Practitioner - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ian Best, M.D. is a Pediatrics Physician provider in Marseilles, IL (NPI 1659359248).
Provider details
- NPI number
- 1659359248
- Entity type
- Individual
- Primary specialty
- Pediatrics PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 036111569 (IL)
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
20 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
- 2006-01-04
- Last updated
- 2020-02-25
- Certified
- 2020-02-25
Frequently asked questions
- What is Ian Best's NPI number?
- Ian Best's National Provider Identifier (NPI) is 1659359248, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ian Best's specialty?
- Ian Best is listed in the NPPES registry with a primary specialty of Pediatrics Physician (Allopathic & Osteopathic Physicians).
- Where is Ian Best located?
- Ian Best's practice location on file with NPPES is 580 Sycamore St, Marseilles, IL 61341-1366.
- What is Ian Best's phone number?
- The practice phone number listed in the NPPES registry for Ian Best is (815) 795-2122.
- Does Ian Best accept Medicare?
- Ian Best is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ian Best's NPI active?
- Yes — Ian Best's NPI (1659359248) is active in the NPPES registry as of the last update on 2020-02-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.