Dr. Wonkyu Pak, MD

  • Los Angeles, CA
  • Ophthalmologist
NPI1376542894PAC ID4385723568
Medicare services, 2024
1,717
Medicare patients, 2024
441
Part D claims, 2024
9,475
MIPS score, 2024
98
Industry payments
$7,595
Practice address
266 S Harvard Blvd, Los Angeles, CA 90004
Practice phone
Call (213) 387-9000
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

Los Angeles Ambulatory Surgery Center LLC

Los Angeles, California

See all 3 affiliations

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Dr. Wonkyu Pak is an ophthalmologist in Los Angeles, California

Dr. Pak practices at Los Angeles Ambulatory Surgery Center LLC in Los Angeles, California.

Dr. Pak's NPI, 1376542894, was assigned on July 18, 2005. Dr. Pak graduated from Vagelos College of Physicians and Surgeons in 1985. Dr. Pak holds California license G59023.

NPI and contact details
Medicare PAC ID
4385723568
NPI enumeration date
July 18, 2005
NPI status
Active
Accepts Medicare assignment
Yes
Practice phone
(213) 387-9000
Professional email
Get email
Personal email
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Mobile number
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Sex
Male
Estimated age
67
Medical school graduation
1985

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)

Dr. Wonkyu Pak practices at Los Angeles Ambulatory Surgery Center LLC in Los Angeles, California

Dr. Pak's primary practice is Los Angeles Ambulatory Surgery Center LLC, at 266 S Harvard Blvd, Los Angeles, CA 90004 in Los Angeles County. The practice phone is (213) 387-9000.

  • Los Angeles Ambulatory Surgery Center LLC
    266 S Harvard Blvd, Los Angeles, CA 90004 · Los Angeles CountyPhone(213) 387-9000

Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data

Dr. Wonkyu Pak is affiliated with 2 sites of care and 1 medical group

Dr. Pak's primary practice is Los Angeles Ambulatory Surgery Center LLC in Los Angeles, California. Dmand AI also links Dr. Pak to 1 group practice or clinic and 1 medical group, each named with a free account.

Los Angeles Ambulatory Surgery Center LLCLos Angeles, CaliforniaPrimary
1 group practice or clinicName with a free account1 medical groupName with a free account
See all 3 affiliations for Dr. Pak

Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data

Dmand AI tracks the EHR system at Dr. Wonkyu Pak's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Pak practices. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
Los Angeles Ambulatory Surgery Center LLCAvailable with a free account
+1 more site and 1 medical groupAvailable with a free account

Source: Dmand AI Technology Install Data

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Dr. Wonkyu Pak is one of 2,621 ophthalmologists in California

Ophthalmology is Dr. Pak's primary specialty in the NPI Registry, under taxonomy code 207W00000X. Dr. Pak is board certified in ophthalmology by the American Board of Ophthalmology. Dmand AI has Dr. Pak's licenses on file in 3 states: California, Missouri and Kansas.

Specialties and state licenses

  • Ophthalmology, CaliforniaPrimaryLicense G59023 · 1986 to 2026 · taxonomy 207W00000X
  • Missouri license2011 to 2026
  • Kansas license2010 to 2025

Clinical focus

Dmand AI lists age-related macular degeneration, cataract, cataract surgery with lens implant, cold sores or genital herpes, conjunctivitis, dry eye, eyelid inflammation and glaucoma among the conditions Dr. Pak treats.

Ophthalmologists near Dr. Pak

Counts of ophthalmologists with a Dmand AI profile, by place and practice. Each opens the list.

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks

Dr. Wonkyu Pak billed Medicare for 1,717 services in 2024

CMS data shows 1,717 Medicare services from Dr. Pak across 15 procedure codes in 2024, for 441 Medicare patients. Medicare paid $131,845 for them.

Medicare services, 20241,717
Medicare patients441
Paid by Medicare$131,845
Procedure codes15

Dr. Pak's Medicare services by type, 2023 to 2024

  • 2023
  • 2024
Tests and treatments
2023: 2,3202024: 1,44538%
Surgery
2023: 3752024: 18152%
Drugs given in the office
2023: 2792024: 5082%
Office and hospital visits
2023: 672024: 2169%
Imaging
2023: 512024: 2061%

Where Dr. Pak's Medicare services took place, 2024

  • In an office1,68698%
  • In a facility312%

Dr. Pak compared with the California median for ophthalmologists, 2024

  • Dr. Pak
  • California median
Medicare services
1,717vs 1,07959% above
Medicare patients
441vs 421Close to median
Part D claims
9,400vs 61815.2 times

Medians across 2,568 ophthalmologists in California with Dmand AI profiles that report each measure.

Dr. Pak's most billed Medicare procedure codes, 2024

CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.

See all procedures by Dr. Pak

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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks

Dr. Wonkyu Pak treated 441 Medicare patients in 2024, average age 79

CMS counts 441 Medicare patients who saw Dr. Pak in 2024. The largest group is 75 to 84, with 204 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 77% are also on Medicaid. Their average risk score is 1.54, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.

Across all payers, Dmand AI patient panel data puts Dr. Pak's median patient age at 71, with 61% women.

Medicare patients, 2024441
Average age79
Average risk score1.54
Also on Medicaid77%

Dr. Pak's Medicare patients by age, 2024

CMS leaves out age groups with fewer than 11 patients.

Dr. Pak's Medicare patients by sex, 2024

  • Women31872%
  • Men12328%

Chronic conditions among Dr. Pak's Medicare patients, 2024

  1. High blood pressure75%
  2. High cholesterol75%
  3. Diabetes66%
  4. Arthritis60%
  5. Osteoporosis39%
  6. Chronic kidney disease26%
  7. Ischemic heart disease24%
  8. Depression23%

Share of Medicare patients with each condition. A patient can have several.

Dr. Pak's patients across all payers

Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.

Patient panel by age, all payers

Median age 71

Patient panel by sex, all payers

  • Women61%
  • Men38%

Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data

Dr. Wonkyu Pak wrote 9,475 Medicare Part D claims in 2024

In 2024, Dr. Pak wrote 9,475 Medicare Part D claims for 1,296 patients. 55% of them were for generic drugs. CMS names the drug for 9,400 of them, across 39 drugs with 11 or more claims each, at $1,733,462 in total drug cost. In 2023, CMS named 11,476 claims across 42 drugs.

Part D claims, 20249,475
Drugs named by CMS39
Total drug cost$1.7M
Part D patients1,296

Dr. Pak's Part D claims by kind of drug, 2024

  • Generic5,195 claims55%
  • Brand-name4,280 claims45%

Dr. Pak's most prescribed drugs by claims, 2024

CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.

Part D claims for drugs CMS names, 2023 to 2024

  • 2023
  • 2024
Claims for drugs CMS names
2023: 11,4762024: 9,40018%

Drugs named by CMS: 39 in 2024, 42 in 2023.

See all prescribing by Dr. Pak

Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data

Dr. Wonkyu Pak scored 98 out of 100 in Medicare's MIPS program for 2024

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 98 out of 100 for Dr. Pak for performance year 2024, reported as part of a group. Dr. Pak accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 66 procedures of cataract surgery by Dr. Pak, more than 68% of the clinicians it reports for that procedure.

Accepts Medicare assignment
Yes

Dr. Pak's MIPS scores, performance year 2024

  • 98of 100Final score
  • 91.9of 100Quality
  • 40of 100Improvement Activities
  • 76of 100Cost

Each score is out of 100. The final score weighs the categories CMS scored for this clinician.

Where Dr. Pak ranks in Medicare procedure volume

Cataract surgery
68th percentile66 procedures

CMS ranks each clinician against every clinician it reports for the same procedure category.

Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)

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Dr. Wonkyu Pak received $7,595 in industry payments from 2016 to 2025

CMS Open Payments shows 401 general payments to Dr. Pak from 26 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 99% of the total. Allergan Inc. paid the most, $2,033.

General payments to Dr. Pak by program year, 2016 to 2025

General payments to Dr. Pak by kind, 2016 to 2025

$7.6Kin total
  • Food and beverage$7,52799%
  • Gifts$391%
  • Education$290%

Companies that paid Dr. Pak the most, 2016 to 2025

Share is of all general payments to this clinician.

See all payments to Dr. Pak

Source: Open Payments (CMS), 2025 data, released July 7, 2026

Dr. Wonkyu Pak graduated from Vagelos College of Physicians and Surgeons

Dr. Pak graduated from Vagelos College of Physicians and Surgeons in 1985.

  1. Medical schoolVagelos College of Physicians and Surgeons
  2. Board certified in ophthalmologyAmerican Board of Ophthalmology

Source: Dmand AI Professional Profile Data

Dr. Wonkyu Pak accepts plans from 13 insurance carriers

Dr. Pak is in network with 13 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. Medicare plans come from the most carriers, 10. Check the plan with the practice before a visit.

Plan types Dr. Pak accepts, by number of carriers

  1. Medicare10
  2. PPO8
  3. HMO6
  4. POS4
  5. EPO1
  6. Medicaid1

Source: Dmand AI Insurance Network Data

Sources for Dr. Wonkyu Pak's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data
Primary practice, affiliations and health systemNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data
Medicare services and procedure codesMedicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab)
State medians for the same specialtyDmand AI Peer Benchmarks
Medicare patients and the all-payer patient panelDmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab)
Part D prescribingMedicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab)
MIPS scores, telehealth, assignment and procedure percentilesDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab)
Industry paymentsOpen Payments (CMS) (opens in a new tab)
Training, board certification and membershipsDmand AI Professional Profile Data
Insurance carriers and plan typesDmand AI Insurance Network Data
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand AI Affiliation Data

Data last refreshed October 2026Report an inaccuracyRemove my information

FAQ

Frequently asked questions about Dr. Wonkyu Pak

Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.

What is Dr. Wonkyu Pak's NPI number?

Dr. Wonkyu Pak's NPI number is 1376542894. It was assigned on July 18, 2005, and it is active in the NPI Registry.

What kind of doctor is Dr. Wonkyu Pak?

Dr. Wonkyu Pak is an ophthalmologist in Los Angeles, California. The primary specialty in the NPI Registry is Ophthalmology Physician (taxonomy code 207W00000X).

Where does Dr. Wonkyu Pak practice?

Dr. Pak practices at 266 S Harvard Blvd, Los Angeles, CA 90004. Dr. Pak's primary practice is Los Angeles Ambulatory Surgery Center LLC in Los Angeles, California. Dmand AI also links Dr. Pak to 1 group practice or clinic and 1 medical group.

What is Dr. Wonkyu Pak's office phone number?

The practice phone on file for Dr. Pak is (213) 387-9000.

What is Dr. Wonkyu Pak's medical license number?

Dr. Pak holds California license G59023, one of the licenses on file in 3 states.

Which states has Dr. Wonkyu Pak been licensed in?

Dmand AI has state licenses on file for Dr. Pak in California (1986 to 2026), Missouri (2011 to 2026) and Kansas (2010 to 2025).

Does Dr. Wonkyu Pak accept Medicare?

Yes. CMS data shows Dr. Pak billed Medicare for 1,717 services in 2024, and Dr. Pak accepts Medicare assignment.

What is Dr. Wonkyu Pak's MIPS score?

Dr. Pak's MIPS final score for performance year 2024 is 98 out of 100, reported as part of a group.

How many Medicare patients does Dr. Wonkyu Pak see?

CMS counts 441 Medicare patients who saw Dr. Pak in 2024, with an average age of 79.

Is Dr. Wonkyu Pak board certified?

Yes. Dr. Pak is board certified in ophthalmology by the American Board of Ophthalmology.

Show 6 more questionsShow fewer questions

What services does Dr. Wonkyu Pak bill to Medicare?

In 2024, Dr. Pak's most billed Medicare services were eye exam or test (92012), eye exam or test (92014) and eye exam or test (92134).

Where did Dr. Wonkyu Pak go to medical school?

Dr. Pak graduated from Vagelos College of Physicians and Surgeons in 1985.

What drugs does Dr. Wonkyu Pak prescribe most?

In 2024 Medicare Part D data, Dr. Pak's most prescribed drugs by claims were Latanoprost, Restasis and Dorzolamide-Timolol.

Has Dr. Wonkyu Pak received payments from drug or device companies?

CMS Open Payments shows $7,595 in general payments to Dr. Pak from 26 companies from 2016 to 2025. The largest total came from Allergan Inc.

How long has Dr. Wonkyu Pak been practicing?

Dr. Pak graduated from medical school in 1985, 41 years ago.

What insurance does Dr. Wonkyu Pak accept?

Dr. Pak is in network with 13 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. Medicare plans come from the most carriers, 10. Check the plan with the practice before a visit.

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