NPPES file of Aug 9, 2026

Ivy Karen Sun, OD

Optometrist · San Ramon, CA

Ivy Karen Sun, OD is an optometrist with a practice address in San Ramon, California, and NPI 1154312916, issued on Nov 2, 2005. Check the license (California 10943T, 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
1154312916
Name
Ivy Karen Sun
Credential
OD
Primary taxonomy
Optometrist 152W00000X
License number
10943T CA
Self-reported in NPPES; status is on the state search
Practice location
175 Market PL, San Ramon, CA 94583
Phone
(925) 275-0202
Enumerated
Nov 2, 2005
Record last updated
Jan 3, 2022
Fax
(925) 275-0447
Medicare enrollment
Enrolled (PECOS I20081213000075); accepts Medicare assignment
Medical or professional school
Southern California College Of Optometry, 1997
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 175 Market PL

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

  1. Victoria Chiu, O.D.Optometrist1477832574
  2. Caryn Ha, O.D.Optometrist1215059225
  3. Breshna Habibi, ODOptometrist1538984083
  4. Emily Lin, ODOptometrist1275969271
  5. Oscar Smith, ODOptometrist1376534065
  6. Andrew Yang, O.D.Optometrist1467432559

Verify Ivy Karen Sun 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 10943T    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. Permanente Medical Group IncVallejo, CA

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

Ivy Karen Sun among 8,308 optometrist records in California

Ivy Karen Sun, 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 2005, is newer than 0% of them.

  • NPI issued2005 · 0% of these records are older, 94% newer
  • In a Medicare fileYes · 67% of these records are
  • In the CMS Doctors and Clinicians fileYes · 43% of these records are
  • Graduated1997 · median 2008 among the 3,573 with a school on file
  • Record last updated2022 · 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).

23 optometrist records list a practice address in San Ramon

They are 23 of the 2,281 NPPES records with a practice address in San Ramon, and 8,308 optometrist records in California.

All 8,308 in California → Every provider in San Ramon → Optometrist nationwide →

The 8 optometrist records with the nearest ZIP codes

  1. Nahid Abdali, O.D.San Ramon, CA 945831700210242
  2. Victoria Chiu, O.D.San Ramon, CA 945831477832574
  3. Jay Delaney, O.D.San Ramon, CA 945831720086135
  4. Caryn Ha, O.D.San Ramon, CA 945831215059225
  5. Saria Iqbal, O.D.San Ramon, CA 945831255696688
  6. C Stephen Johnson, OD FAAOSan Ramon, CA 945831902804875
  7. Saira Khan, O.D.San Ramon, CA 945831073668117
  8. Najla Malak-Majdalani, O.D.San Ramon, CA 945831700921426

Common questions

What is Ivy Karen Sun, OD's NPI number?

Ivy Karen Sun, OD's National Provider Identifier (NPI) is 1154312916, issued on Nov 2, 2005. An NPI identifies a provider in billing; it is not a license.

Where is Ivy Karen Sun, OD located?

The NPPES record lists a practice address at 175 Market PL, San Ramon, CA, 94583. Phone: (925) 275-0202. Providers update this record themselves, so call before visiting.

How can I verify Ivy Karen Sun, OD's license?

NPPES lists California license number 10943T, 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.