Charles Kyumin Oh, M.D.
Specialist · Tustin, CA
Charles Kyumin Oh, M.D. is a specialist with a practice address in Tustin, California, and NPI 1780689042, issued on Jun 14, 2005. Check the license (California A83003, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Charles Kyumin Oh
- Credential
- M.D.
- Primary taxonomy
- Specialist 174400000X
- License number
- A83003 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2552 Walnut Ave, Tustin, CA 92780
- Phone
- (714) 508-1600
- Enumerated
- Jun 14, 2005
- Record last updated
- Jun 28, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (714) 665-8304
- Medicare enrollment
- Enrolled (PECOS I20050620000083); accepts Medicare assignment
- Medical or professional school
- Wayne State University School Of Medicine, 1996
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest specialist records → All 5,749 in California → Look up another NPI →
Also registered at 2552 Walnut Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Vince Afsahi, M.D.Dermatology Physician1700888690
- Thomas Huang, M.D.Otolaryngology Physician1043201155
- Selise James, PAMedical Physician Assistant1457749061
Verify Charles Kyumin Oh in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license A83003Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
50% more Medicare Part D claims than the average specialist in 2024
2,075 Medicare Part D claims for 768 beneficiaries, against an average of 1,380 among the 8,233 providers of this specialty who prescribed in Part D. Brand-name drugs were 6% of claims. 36 claims were for opioids.
Most prescribed
- Fluticasone Propionate434 claims
- Ipratropium Bromide380 claims
- Cefuroxime222 claims
- Nortriptyline Hcl115 claims
- Azelastine Hcl96 claims
- Neomycin-Polymyxin-Hc80 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): 95.7 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: $431.38
24 payments; by number, the most common kind was food and beverage; the largest payer was Optinose US, Inc. The 5,844 providers of this specialty with any payment received $4,760.79 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.
Charles Kyumin Oh among 5,749 specialist records in California
Charles Kyumin Oh, M.D. is one of 5,749 specialist records with a practice address in California. 30% 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, 93% newer
- In a Medicare fileYes · 30% of these records are
- In the CMS Doctors and Clinicians fileYes · 19% of these records are
- Graduated1996 · median 1989 among the 1,075 with a school on file
- Record last updated2011 · 77% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 174400000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Specialist providers in California
There are 5,749 specialist records in California.
All 5,749 in California → Every provider in Tustin → Specialist nationwide →
The 8 specialist records with the nearest ZIP codes
- Mark Brown, M.D.Tustin, CA 927801982663050
- Jennifer DialTustin, CA 927801487073284
- Wilfredo Escober, M.D.Tustin, CA 927801245311554
- Sabrina GaffoglioTustin, CA 927801205209350
- Pia RotmanTustin, CA 927801689093312
- Samireh Said, MDTustin, CA 927801336129998
- Mahaveer Khemka, M.DAnaheim, CA 928011568449965
- Kevin Kuettel, M.D.Anaheim, CA 928011740286384
Common questions
What is Charles Kyumin Oh, M.D.'s NPI number?
Charles Kyumin Oh, M.D.'s National Provider Identifier (NPI) is 1780689042, issued on Jun 14, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Charles Kyumin Oh, M.D. located?
The NPPES record lists a practice address at 2552 Walnut Ave, Tustin, CA, 92780. Phone: (714) 508-1600. Providers update this record themselves, so call before visiting.
How can I verify Charles Kyumin Oh, M.D.'s license?
NPPES lists California license number A83003, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Charles Kyumin Oh, M.D. prescribe under Medicare Part D?
In 2024, Charles Kyumin Oh, M.D. had 2,075 Medicare Part D claims for 768 beneficiaries; the average among specialist prescribers was 1,380. Part D covers Medicare prescriptions only.
What is Charles Kyumin Oh, M.D.'s MIPS final score?
The 2023 MIPS final score is 95.7 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.