OrganizationActive
Ernest I. Watanabe, O.D. Ltd.
NPI 1285818120 · Clinic/Center · Chicago, IL
Ernest I. Watanabe, O.D. Ltd. is a Clinic/Center organization in Chicago, IL (NPI 1285818120).
Provider details
- NPI number
- 1285818120
- Entity type
- Organization
- Primary specialty
- Clinic/CenterAmbulatory Health Care Facilities
- Organization subpart
- No
- Authorized official
- Ernest Watanabe, President(773) 465-6660
- License
- 046006692 (IL)
Specialties & taxonomies
Ambulatory Health Care Facilities
Profile Score
Detailed profile(88/100 index)
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
1108 W Granville Ave
Chicago, IL 60660-2013
Phone: (773) 465-6660
Fax: (773) 274-8222
Street-level locationGet directions
Mailing address
1108 W Granville Ave
Chicago, IL 60660-2013
Other names (DBA / former)
- Doing business as
- Granville Vision Center
Registry dates
- Enumerated
- 2007-12-27
- Last updated
- 2008-09-09
Frequently asked questions
- What is Ernest I. Watanabe, O.D. Ltd.'s NPI number?
- Ernest I. Watanabe, O.D. Ltd.'s National Provider Identifier (NPI) is 1285818120, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Ernest I. Watanabe, O.D. Ltd.?
- Ernest I. Watanabe, O.D. Ltd. is classified in the NPPES registry as Clinic/Center (Ambulatory Health Care Facilities).
- Where is Ernest I. Watanabe, O.D. Ltd. located?
- Ernest I. Watanabe, O.D. Ltd.'s practice location on file with NPPES is 1108 W Granville Ave, Chicago, IL 60660-2013.
- What is Ernest I. Watanabe, O.D. Ltd.'s phone number?
- The practice phone number listed in the NPPES registry for Ernest I. Watanabe, O.D. Ltd. is (773) 465-6660.
- Who is the authorized official for Ernest I. Watanabe, O.D. Ltd.?
- The authorized official listed on Ernest I. Watanabe, O.D. Ltd.'s NPPES record is Ernest Watanabe, President. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Ernest I. Watanabe, O.D. Ltd.'s NPI active?
- Yes — Ernest I. Watanabe, O.D. Ltd.'s NPI (1285818120) is active in the NPPES registry as of the last update on 2008-09-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.