Christina Wong Grattan, O.D.
Optometrist · Torrance, CA
Christina Wong Grattan, O.D. is an optometrist with a practice address in Torrance, California, and NPI 1194150953, issued on Sep 11, 2013. Check the license (California 14709, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Christina Wong Grattan
- Credential
- O.D.
- Primary taxonomy
- Optometrist 152W00000X
- License number
- 14709 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4825 Torrance Blvd Ste 100, Torrance, CA 90503
- Phone
- (310) 937-6585
- Enumerated
- Sep 11, 2013
- Record last updated
- Aug 10, 2023
- Fax
- (310) 542-3809
- Medicare enrollment
- Enrolled (PECOS I20140529000234); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest optometrist records → All 8,308 in California → Look up another NPI →
Verify Christina Wong Grattan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 14709Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
12% more Medicare Part D claims than the average optometrist in 2024
309 Medicare Part D claims for 122 beneficiaries, against an average of 277 among the 33,128 providers of this specialty who prescribed in Part D. Brand-name drugs were 47% of claims.
Most prescribed
- Latanoprost95 claims
- Dorzolamide-Timolol31 claims
- Timolol Maleate25 claims
- Prednisolone Acetate20 claims
- Moxifloxacin19 claims
- Brimonidine Tartrate18 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.
Bills Medicare through one group practice
- Providence Medical InstituteTorrance, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Christina Wong Grattan among 8,308 optometrist records in California
Christina Wong Grattan, 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 2013, is newer than 66% of them.
- NPI issued2013 · 66% of these records are older, 32% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 43% of these records are
- Graduated2013 · median 2008 among the 3,573 with a school on file
- Record last updated2023 · 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 Torrance → Optometrist nationwide →
The 8 optometrist records with the nearest ZIP codes
- Geri Bonde, O.D.Torrance, CA 905031316982556
- Jessica Chang, O.D.Torrance, CA 905031972667889
- Albert Chun, O.D.Torrance, CA 905031952378010
- David Cloutier, O.D.Torrance, CA 905031578506549
- Jeffrey Fleming, O.D.Torrance, CA 905031679542989
- Deborah Geering-Fend, O.D.Torrance, CA 905031669553871
- Emily Kim, O.D.Torrance, CA 905031679689863
- Grace Kuo, O.D.Torrance, CA 905031588711519
Common questions
What is Christina Wong Grattan, O.D.'s NPI number?
Christina Wong Grattan, O.D.'s National Provider Identifier (NPI) is 1194150953, issued on Sep 11, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Christina Wong Grattan, O.D. located?
The NPPES record lists a practice address at 4825 Torrance Blvd Ste 100, Torrance, CA, 90503. Phone: (310) 937-6585. Providers update this record themselves, so call before visiting.
How can I verify Christina Wong Grattan, O.D.'s license?
NPPES lists California license number 14709, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Christina Wong Grattan, O.D. prescribe under Medicare Part D?
In 2024, Christina Wong Grattan, O.D. had 309 Medicare Part D claims for 122 beneficiaries; the average among optometrist prescribers was 277. Part D covers Medicare prescriptions 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.