Dr. Wonkyu Pak, MD
- 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
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Los Angeles Ambulatory Surgery Center LLC
Los Angeles, California
Find Dr. Pak's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
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
- 1376542894NPI Registry (opens in a new tab)
- 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
- Get email
- Mobile number
- Get number
- 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 LLC266 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.
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.
| Site | EHR vendor and product |
|---|---|
| Los Angeles Ambulatory Surgery Center LLC | Available with a free account |
| +1 more site and 1 medical group | Available 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, CaliforniaPrimary
- Missouri license
- Kansas license
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.
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.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Pak and other ophthalmologists in California.
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.
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
- High blood pressure75%
- High cholesterol75%
- Diabetes66%
- Arthritis60%
- Osteoporosis39%
- Chronic kidney disease26%
- Ischemic heart disease24%
- 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.
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.
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
- 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.
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.
- Medical school
- Board certified in 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.
- Aetna
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Humana
- LA Care
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Molina
- +5 more carriersWith a free account
Plan types Dr. Pak accepts, by number of carriers
- Medicare10
- PPO8
- HMO6
- POS4
- EPO1
- Medicaid1
Source: Dmand AI Insurance Network Data
Sources for Dr. Wonkyu Pak's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare 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 percentiles | Doctors 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 payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand 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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