Thomas Boo-Hun Choi, M.D.
Ophthalmology Physician · Downey, CA
Thomas Boo-Hun Choi, M.D. is an ophthalmology physician with a practice address in Downey, California, and NPI 1477555985, issued on Aug 15, 2005. Check the license (California G69677, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Thomas Boo-Hun Choi
- Credential
- M.D.
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License number
- G69677 CA
Self-reported in NPPES; status is on the state search - Practice location
- 10800 Paramount Blvd, Downey, CA 90241
- Phone
- (562) 622-3937
- Enumerated
- Aug 15, 2005
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (562) 622-0040
- Medicaid ID
- 00G696770 CA
- Medicare enrollment
- Enrolled (PECOS I20070825000090); accepts Medicare assignment
- Medical or professional school
- University Of California, Geffen School Of Medicine, 1989
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 2,899 in California → Look up another NPI →
Also registered at 10800 Paramount Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Daphne Allison, AMFTMarriage & Family Therapist1265390652
- Domingo Barrientos, M.D.Internal Medicine Physician1184685281
- Neal Brown, DDSDentist1619295862
- Emma McCulloughMarriage & Family Therapist1609481035
- Steven Nagelberg, M.D.Specialist1114060720
Verify Thomas Boo-Hun Choi in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G69677Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
30% more Medicare Part D claims than the average ophthalmology physician in 2024
1,970 Medicare Part D claims for 466 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 34% of claims.
Most prescribed
- Latanoprost366 claims
- Moxifloxacin339 claims
- Prednisolone Acetate293 claims
- Ketorolac Tromethamine221 claims
- Azelastine Hcl184 claims
- Brimonidine Tartrate139 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 MIPS final score for 2023 (Medicare payment program): 27.5 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $31.68
1 payment: food and beverage; the largest payer was Bausch & Lomb Americas Inc. The 13,221 providers of this specialty with any payment received $4,535.02 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.
Thomas Boo-Hun Choi among 2,899 ophthalmology physician records in California
Thomas Boo-Hun Choi, M.D. is one of 2,899 ophthalmology physician records with a practice address in California. 79% 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, 91% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated1989 · median 2001 among the 1,907 with a school on file
- Record last updated2007 · 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 207W00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Ophthalmology Physician providers in California
There are 2,899 ophthalmology physician records in California.
All 2,899 in California → Every provider in Downey → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Brian Brown, M.D.Downey, CA 902411992748479
- Joseph Hsu, MDDowney, CA 902411760584270
- Marc Segall, M.D.Downey, CA 902411326151531
- Annie Lim, MDDowney, CA 902421639377310
- Amy McCluskey, MDDowney, CA 902421598813305
- Quoc-Tuan Ngo, MDDowney, CA 902421437787645
- Mehrdad Aghai, M.D.Gardena, CA 902471841302577
- Amarpreet BrarGardena, CA 902471356361109
Common questions
What is Thomas Boo-Hun Choi, M.D.'s NPI number?
Thomas Boo-Hun Choi, M.D.'s National Provider Identifier (NPI) is 1477555985, issued on Aug 15, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Thomas Boo-Hun Choi, M.D. located?
The NPPES record lists a practice address at 10800 Paramount Blvd, Downey, CA, 90241. Phone: (562) 622-3937. Providers update this record themselves, so call before visiting.
How can I verify Thomas Boo-Hun Choi, M.D.'s license?
NPPES lists California license number G69677, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Thomas Boo-Hun Choi, M.D. prescribe under Medicare Part D?
In 2024, Thomas Boo-Hun Choi, M.D. had 1,970 Medicare Part D claims for 466 beneficiaries; the average among ophthalmology physician prescribers was 1,518. Part D covers Medicare prescriptions only.
What is Thomas Boo-Hun Choi, M.D.'s MIPS final score?
The 2023 MIPS final score is 27.5 of 100. 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.