Coral Yvonne St Onge, OD
Optometrist · San Marcos, CA
Coral Yvonne St Onge, OD is an optometrist with a practice address in San Marcos, California, and NPI 1952060873, issued on Dec 8, 2021. Check the license (California OPT34914-TLG, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Coral Yvonne St Onge
- Credential
- OD
- Primary taxonomy
- Optometrist 152W00000X
- License number
- OPT34914-TLG CA
Self-reported in NPPES; status is on the state search - Practice location
- 838 Nordahl RD Ste 220, San Marcos, CA 92069
- Phone
- (760) 738-9985
- Enumerated
- Dec 8, 2021
- Record last updated
- Nov 21, 2025
- Fax
- (800) 838-2695
- Medicare enrollment
- Enrolled (PECOS I20211222002160); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest optometrist records → All 8,308 in California → Look up another NPI →
Also registered at 838 Nordahl RD Ste 220
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Lorne Kapner, M.D.Ophthalmology Physician1144255621
Verify Coral Yvonne St Onge in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license OPT34914-TLGCheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
80% fewer Medicare Part D claims than the average optometrist in 2024
56 Medicare Part D claims for 27 beneficiaries, against an average of 277 among the 33,128 providers of this specialty who prescribed in Part D. Brand-name drugs were 52% of claims.
Most prescribed
- Restasis15 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 45.1 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $99.84
5 payments; by number, the most common kind was food and beverage; the largest payer was Glaukos Corporation. The 34,453 providers of this specialty with any payment received $769.99 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Karen Peschke OD A Professional Corporation OF OptometrySan Marcos, CA
- North County Eye Center, Inc.Escondido, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Coral Yvonne St Onge among 8,308 optometrist records in California
Coral Yvonne St Onge, 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 2021, is newer than 86% of them.
- NPI issued2021 · 86% of these records are older, 11% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 43% of these records are
- Graduated2021 · median 2008 among the 3,573 with a school on file
- Record last updated2025 · 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 San Marcos → Optometrist nationwide →
The 8 optometrist records with the nearest ZIP codes
- Valerie Frimtzis, O.D.San Marcos, CA 920691457559429
- Robert Gentile, O.D.San Marcos, CA 920691255460283
- Denton Kimball, O.D.San Marcos, CA 920691982745147
- James Phung, OD.San Marcos, CA 920691225181951
- Christopher Abbott, O.D.Santee, CA 920711417936220
- Mario Arellano, O.D.Santee, CA 920711477739712
- Carl Boeck, O.D.Santee, CA 920711588656151
- Elizabeth Christensen, O.D.Rancho Santa Fe, CA 920671225072036
Common questions
What is Coral Yvonne St Onge, OD's NPI number?
Coral Yvonne St Onge, OD's National Provider Identifier (NPI) is 1952060873, issued on Dec 8, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Coral Yvonne St Onge, OD located?
The NPPES record lists a practice address at 838 Nordahl RD Ste 220, San Marcos, CA, 92069. Phone: (760) 738-9985. Providers update this record themselves, so call before visiting.
How can I verify Coral Yvonne St Onge, OD's license?
NPPES lists California license number OPT34914-TLG, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Coral Yvonne St Onge, OD prescribe under Medicare Part D?
In 2024, Coral Yvonne St Onge, OD had 56 Medicare Part D claims for 27 beneficiaries; the average among optometrist prescribers was 277. Part D covers Medicare prescriptions only.
What is Coral Yvonne St Onge, OD's MIPS final score?
The 2023 MIPS final score is 45.1 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.
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.