William Reiff, MD
NPI 1720187685 · Ophthalmology Physician · Elgin, IL
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Reiff, MD is a Ophthalmology Physician provider in Elgin, IL (NPI 1720187685).
Provider details
- NPI number
- 1720187685
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 036052088 (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
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
- 2006-09-21
- Last updated
- 2011-01-07
Frequently asked questions
- What is William Reiff's NPI number?
- William Reiff's National Provider Identifier (NPI) is 1720187685, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Reiff's specialty?
- William Reiff is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is William Reiff located?
- William Reiff's practice location on file with NPPES is 1435 N Randall Rd, Elgin, IL 60123-2306.
- What is William Reiff's phone number?
- The practice phone number listed in the NPPES registry for William Reiff is (847) 841-8866.
- Does William Reiff accept Medicare?
- William Reiff is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Reiff's NPI active?
- Yes — William Reiff's NPI (1720187685) is active in the NPPES registry as of the last update on 2011-01-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.