NPPES file of Aug 9, 2026

Gregory Guido Cook, OD

Optometrist · Bloomington, IN

Gregory Guido Cook, OD is an optometrist with a practice address in Bloomington, Indiana, and NPI 1689564833, issued on Jul 8, 2025. Check the license (Indiana 18004605A, as entered in NPPES) with the Indiana board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1689564833
Name
Gregory Guido Cook
Credential
OD
Primary taxonomy
Optometrist 152W00000X
License number
18004605A IN
Self-reported in NPPES; status is on the state search
Practice location
744 E 3RD St, Bloomington, IN 47405
Phone
(812) 855-8436
Enumerated
Jul 8, 2025
Record last updated
Jul 8, 2025
Medicare enrollment
Enrolled (PECOS I20250715002408); accepts Medicare assignment
Medical or professional school
Indiana University - School Of Optometry, 2025
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest optometrist records → All 1,578 in Indiana → Look up another NPI →

Also registered at 744 E 3RD St

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Nataliya BabiychukOptometrist1629966882
  2. Carolyn Begley, O.D.Optometrist1659347730
  3. Alyssa Bentz, OD, MSOptometrist1982591269
  4. Kristen Bowles-Johnson, O.D.Optometrist1689947590
  5. Grace Brasel, ODOptometrist1619548583
  6. Hin Cheung, O.D.Optometrist1548677388

Verify Gregory Guido Cook in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Indiana board licenses this profession
    Search for license 18004605A    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the Indiana license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Bills Medicare through one group practice

  1. Indiana UniversityBloomington, IN

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Gregory Guido Cook among 1,578 optometrist records in Indiana

Gregory Guido Cook, OD is one of 1,578 optometrist records with a practice address in Indiana. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2025, is newer than 96% of them.

  • NPI issued2025 · 96% of these records are older, 2% newer
  • In a Medicare fileYes · 73% of these records are
  • In the CMS Doctors and Clinicians fileYes · 64% of these records are
  • Graduated2025 · median 2008 among the 1,014 with a school on file
  • Record last updated2025 · 66% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 152W00000X and a Indiana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

102 optometrist records list a practice address in Bloomington

They are 102 of the 3,287 NPPES records with a practice address in Bloomington, and 1,578 optometrist records in Indiana.

All 1,578 in Indiana → Every provider in Bloomington → Optometrist nationwide →

The 8 optometrist records with the nearest ZIP codes

  1. Carolyn Begley, O.D.Bloomington, IN 474051659347730
  2. Clifford Brooks, O.D.Bloomington, IN 474051598733040
  3. Rowan Candy, O.D.Bloomington, IN 474051447228200
  4. David Goss, O.D.Bloomington, IN 474051437127206
  5. Kathryn Gray, O.D.Bloomington, IN 474051922076280
  6. Steven Hitzeman, O.D.Bloomington, IN 474051407825409
  7. Elli Kollbaum, O.D.Bloomington, IN 474051851360648
  8. Peter Kollbaum, O.D.Bloomington, IN 474051174592794

Common questions

What is Gregory Guido Cook, OD's NPI number?

Gregory Guido Cook, OD's National Provider Identifier (NPI) is 1689564833, issued on Jul 8, 2025. An NPI identifies a provider in billing; it is not a license.

Where is Gregory Guido Cook, OD located?

The NPPES record lists a practice address at 744 E 3RD St, Bloomington, IN, 47405. Phone: (812) 855-8436. Providers update this record themselves, so call before visiting.

How can I verify Gregory Guido Cook, OD's license?

NPPES lists Indiana license number 18004605A, as entered by the provider. Search the Indiana board that licenses this profession; the NPPES record confirms identity only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.