NPPES file of Aug 9, 2026

Cindy Nguyen Koo, OD

Optometrist · Sacramento, CA

Cindy Nguyen Koo, OD is an optometrist with a practice address in Sacramento, California, and NPI 1023905882, issued on Jun 23, 2025. Check the license (California 35993, as entered in NPPES) with the California 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
1023905882
Name
Cindy Nguyen Koo
Credential
OD
Primary taxonomy
Optometrist 152W00000X
License number
35993 CA
Self-reported in NPPES; status is on the state search
Practice location
1515 Response RD, Sacramento, CA 95815
Phone
(916) 649-1515
Enumerated
Jun 23, 2025
Record last updated
Aug 6, 2026
Fax
(916) 649-1516
Medicare enrollment
Enrolled (PECOS I20250821001831); accepts Medicare assignment
Medical or professional school
University Of California - 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 8,308 in California → Look up another NPI →

Also registered at 1515 Response RD

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

  1. Jacob Brubaker, M.D.Glaucoma Specialist (Ophthalmology) Physician1740433945
  2. Sharon Cheatle, ODOptometrist1508357617
  3. Michelle Hoyt, O.DOptometrist1215471891
  4. Samuel Lee, M.D.Ophthalmology Physician1306173893
  5. Xiongfei Liu, M.D.Ophthalmology Physician1497135156
  6. Patricia Sierra, MDOphthalmology Physician1710997895

Verify Cindy Nguyen Koo in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich California board licenses this profession
    Search for license 35993    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 California 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. Sacramento Eye Consultants A Med CorpSacramento, CA

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

Cindy Nguyen Koo among 8,308 optometrist records in California

Cindy Nguyen Koo, OD is one of 8,308 optometrist records with a practice address in California. 67% 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, 1% newer
  • In a Medicare fileYes · 67% of these records are
  • In the CMS Doctors and Clinicians fileYes · 43% of these records are
  • Graduated2025 · median 2008 among the 3,573 with a school on file
  • Record last updated2026 · 67% 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 California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Optometrist providers in California

There are 8,308 optometrist records in California.

All 8,308 in California → Every provider in Sacramento → Optometrist nationwide →

The 8 optometrist records with the nearest ZIP codes

  1. Selina Chan, O.D.Sacramento, CA 958151225117286
  2. John Corpus, ODSacramento, CA 958151902829336
  3. Taz Curtis, O.D.Sacramento, CA 958151114084266
  4. Jennifer Fong, O.D.Sacramento, CA 958151295703023
  5. Corey Hoekstra, O.D.Sacramento, CA 958151659466035
  6. Benjamin Ja, O.D.Sacramento, CA 958151720172661
  7. Jeffrey Klink, O.D.Sacramento, CA 958151639174378
  8. Bill Lum, O.D.Sacramento, CA 958151184781882

Common questions

What is Cindy Nguyen Koo, OD's NPI number?

Cindy Nguyen Koo, OD's National Provider Identifier (NPI) is 1023905882, issued on Jun 23, 2025. An NPI identifies a provider in billing; it is not a license.

Where is Cindy Nguyen Koo, OD located?

The NPPES record lists a practice address at 1515 Response RD, Sacramento, CA, 95815. Phone: (916) 649-1515. Providers update this record themselves, so call before visiting.

How can I verify Cindy Nguyen Koo, OD's license?

NPPES lists California license number 35993, as entered by the provider. Search the California 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.