NPPES file of Aug 9, 2026

Michael Kay Yoon, M.D.

Ophthalmology Physician · Banning, CA

Michael Kay Yoon, M.D. is an ophthalmology physician with a practice address in Banning, California, and NPI 1124219332, issued on Aug 5, 2007. Check the license (California A95899, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1124219332
Name
Michael Kay Yoon
Credential
M.D.
Primary taxonomy
Ophthalmology Physician 207W00000X
License number
A95899 CA
Self-reported in NPPES; status is on the state search
Practice location
6109 W Ramsey St, Banning, CA 92220
Phone
(951) 845-0313
Enumerated
Aug 5, 2007
Record last updated
Jan 17, 2026
Fax
(951) 845-4143
Medicare enrollment
Enrolled (PECOS I20090603000531); accepts Medicare assignment
Medical or professional school
University Of California, San Francisco School Of Medicine, 2004
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest ophthalmology physician records → All 2,899 in California → Look up another NPI →

Also registered at 6109 W Ramsey St

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Kim Bennett, P.A.Family Medicine Physician1992733141
  2. Robert Creek, M.D.Cardiovascular Disease Physician1821021338
  3. Brandon DecaluweOphthalmology Physician1316365521
  4. Leah Dixson, PA-CPhysician Assistant1740306711
  5. Howard Green, MDFamily Medicine Physician1851330674
  6. Carri Lakes, NPNurse Practitioner1134609415

Verify Michael Kay Yoon in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A95899    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

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5.5 times the Medicare Part D claims of the average ophthalmology physician in 2024

8,360 Medicare Part D claims for 1,203 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 30% of claims.

  1. Michael Yoon8,360
  2. Specialty average1,518

Most prescribed

  1. Latanoprost2,950 claims
  2. Dorzolamide-Timolol1,095 claims
  3. Brimonidine Tartrate877 claims
  4. Timolol Maleate576 claims
  5. Prednisolone Acetate545 claims
  6. Ketorolac Tromethamine393 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.

Industry payments in 2024: $21.30

1 payment: food and beverage; the largest payer was Alcon Vision LLC. 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.

  1. Michael Yoon$21.30
  2. Specialty average$4,535.02

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

  1. Beaver Medical Group P CRedlands, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Michael Kay Yoon among 2,899 ophthalmology physician records in California

Michael Kay Yoon, 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 2007, is newer than 55% of them.

  • NPI issued2007 · 55% of these records are older, 33% newer
  • In a Medicare fileYes · 79% of these records are
  • In the CMS Doctors and Clinicians fileYes · 66% of these records are
  • Graduated2004 · median 2001 among the 1,907 with a school on file
  • Record last updated2026 · 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 Banning → Ophthalmology Physician nationwide →

The 8 ophthalmology physician records with the nearest ZIP codes

  1. Brandon DecaluweBanning, CA 922201316365521
  2. George Ching, MDBrawley, CA 922271013921907
  3. Jerome Chatow, M.D.Palm Desert, CA 922111891060646
  4. Dung Le, MDPalm Desert, CA 922111861594137
  5. Xuan Le-Nguyen, M.DPalm Desert, CA 922111942593702
  6. Erik Williams, MDPalm Desert, CA 922111568540417
  7. Cesar Chavez, MDEl Centro, CA 922431720082563
  8. Mark Osterloh, M.D.El Centro, CA 922431073750097

Common questions

What is Michael Kay Yoon, M.D.'s NPI number?

Michael Kay Yoon, M.D.'s National Provider Identifier (NPI) is 1124219332, issued on Aug 5, 2007. An NPI identifies a provider in billing; it is not a license.

Where is Michael Kay Yoon, M.D. located?

The NPPES record lists a practice address at 6109 W Ramsey St, Banning, CA, 92220. Phone: (951) 845-0313. Providers update this record themselves, so call before visiting.

How can I verify Michael Kay Yoon, M.D.'s license?

NPPES lists California license number A95899, 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 Michael Kay Yoon, M.D. prescribe under Medicare Part D?

In 2024, Michael Kay Yoon, M.D. had 8,360 Medicare Part D claims for 1,203 beneficiaries; the average among ophthalmology physician prescribers was 1,518. 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.