Robert Diegel, O.D.
NPI 1881757177 · Optometrist · Indianapolis, IN
Enrolled with Medicare as Order and Referring Only - Optometry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Robert Diegel, O.D. is a Optometrist provider in Indianapolis, IN (NPI 1881757177).
Provider details
- NPI number
- 1881757177
- Entity type
- Individual
- Primary specialty
- OptometristEye and Vision Services Providers
- Credential
- O.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 4901003625 (MI)
Specialties & taxonomies
Eye and Vision Services Providers
Eye and Vision Services Providers
Eye and Vision Services Providers
Eye and Vision Services Providers
Eye and Vision Services Providers
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
- 2006-12-18
- Last updated
- 2014-11-04
Frequently asked questions
- What is Robert Diegel's NPI number?
- Robert Diegel's National Provider Identifier (NPI) is 1881757177, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert Diegel's specialty?
- Robert Diegel is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).
- Where is Robert Diegel located?
- Robert Diegel's practice location on file with NPPES is 6372 Guilford Ave, Indianapolis, IN 46220-1750.
- What is Robert Diegel's phone number?
- The practice phone number listed in the NPPES registry for Robert Diegel is (317) 255-3333.
- Does Robert Diegel accept Medicare?
- Robert Diegel is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Robert Diegel's NPI active?
- Yes — Robert Diegel's NPI (1881757177) is active in the NPPES registry as of the last update on 2014-11-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.