Karissa H. Do, O.D.
Optometrist · Fountain Valley, CA
Karissa H. Do, O.D. is an optometrist with a practice address in Fountain Valley, California, and NPI 1598820433, issued on Dec 22, 2006. Check the license (California 11125T, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Karissa H. Do
- Credential
- O.D.
- Primary taxonomy
- Optometrist 152W00000X
- License number
- 11125T CA
Self-reported in NPPES; status is on the state search - Practice location
- 18430 Brookhurst St Ste 100, Fountain Valley, CA 92708
- Phone
- (714) 968-9121
- Enumerated
- Dec 22, 2006
- Record last updated
- Dec 14, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (714) 962-6521
- Medicare enrollment
- Enrolled (PECOS I20180716000691); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest optometrist records → All 8,308 in California → Look up another NPI →
Also registered at 18430 Brookhurst St Ste 100
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Tony Vu, O.D.Optometrist1942221346
Verify Karissa H. Do in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 11125TCheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $336.24
8 payments; by number, the most common kind was food and beverage; the largest payer was Bausch & Lomb Americas Inc. 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 one group practice
- Tony D VU OD IncFountain Valley, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Karissa H. Do among 8,308 optometrist records in California
Karissa H. Do, O.D. 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 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 66% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 43% of these records are
- Graduated1999 · median 2008 among the 3,573 with a school on file
- Record last updated2018 · 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).
26 optometrist records list a practice address in Fountain Valley
They are 26 of the 2,190 NPPES records with a practice address in Fountain Valley, and 8,308 optometrist records in California.
All 8,308 in California → Every provider in Fountain Valley → Optometrist nationwide →
The 8 optometrist records with the nearest ZIP codes
- James Cooperman, ODFountain Valley, CA 927081689639429
- Tina Dao, O.D.Fountain Valley, CA 927081770507659
- Barbara Fineberg, O.D.Fountain Valley, CA 927081003903311
- Sanford Koyama, O.D.Fountain Valley, CA 927081346233798
- Ronald Kuykendall, O.D.Fountain Valley, CA 927081871654103
- Jue Lim, O.D.Fountain Valley, CA 927081518062223
- Van Ly, O.D.Fountain Valley, CA 927081225171713
- Hironobu Mori, O.D.Fountain Valley, CA 927081760569834
Common questions
What is Karissa H. Do, O.D.'s NPI number?
Karissa H. Do, O.D.'s National Provider Identifier (NPI) is 1598820433, issued on Dec 22, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Karissa H. Do, O.D. located?
The NPPES record lists a practice address at 18430 Brookhurst St Ste 100, Fountain Valley, CA, 92708. Phone: (714) 968-9121. Providers update this record themselves, so call before visiting.
How can I verify Karissa H. Do, O.D.'s license?
NPPES lists California license number 11125T, 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.
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.