Dr. David Hyungjun Yi, MD
- Medicare services, 2024
- 3,236
- Medicare patients, 2024
- 1,466
- Part D claims, 2024
- 2,950
- Hospital affiliations
- 1
- Industry payments
- $3,072
- Practice address
- 500 Clark Rd, Tewksbury, MA 01876
- Practice phone
- Call (978) 256-5600
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Massachusetts Eye Associates
Tewksbury, Massachusetts
Find Dr. Yi's professional email, personal email and mobile number
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Dr. David Hyungjun Yi is an ophthalmologist in Tewksbury, Massachusetts
Dr. Yi practices at Massachusetts Eye Associates in Tewksbury, Massachusetts.
Dr. Yi's NPI, 1003808197, was assigned on August 16, 2005. Dr. Yi graduated from Baylor College of Medicine in 1997. Dr. Yi holds Massachusetts license 209741.
- NPI
- 1003808197NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6800868464
- NPI enumeration date
- August 16, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (978) 256-5600
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 55
- Medical school graduation
- 1997
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. David Hyungjun Yi practices at Massachusetts Eye Associates in Tewksbury, Massachusetts
Dr. Yi's primary practice is Massachusetts Eye Associates, at 500 Clark Rd, Tewksbury, MA 01876 in Middlesex County. The practice phone is (978) 256-5600.
- Massachusetts Eye Associates500 Clark Rd, Tewksbury, MA 01876 · Middlesex CountyPhone(978) 256-5600
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. David Hyungjun Yi is affiliated with 3 sites of care and 1 medical group
Dr. Yi's primary practice is Massachusetts Eye Associates in Tewksbury, Massachusetts. Dr. Yi is also affiliated with Lowell General Hospital. Dmand AI also links Dr. Yi to 1 more 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. David Hyungjun Yi's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Yi practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Massachusetts Eye Associates | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. David Hyungjun Yi is one of 617 ophthalmologists in Massachusetts
Ophthalmology is Dr. Yi's primary specialty in the NPI Registry, under taxonomy code 207W00000X. Dr. Yi is licensed in Massachusetts.
Specialties and state licenses
- Ophthalmology, MassachusettsPrimary
Ophthalmologists near Dr. Yi
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. David Hyungjun Yi billed Medicare for 3,236 services in 2024
CMS data shows 3,236 Medicare services from Dr. Yi across 15 procedure codes in 2024, for 1,466 Medicare patients. Medicare paid $338,143 for them.
Dr. Yi's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 1,8192024: 1,8783%
- Office and hospital visits
- 2023: 7882024: 89814%
- Surgery
- 2023: 4442024: 443No change
- Imaging
- 2023: 152024: 1713%
Where Dr. Yi's Medicare services took place, 2024
- In an office2,88789%
- In a facility34911%
Dr. Yi compared with the Massachusetts median for ophthalmologists, 2024
- Dr. Yi
- Massachusetts median
- Medicare services
- 3,236vs 1,5982.0 times
- Medicare patients
- 1,466vs 5942.5 times
- Part D claims
- 2,803vs 5455.1 times
Medians across 612 ophthalmologists in Massachusetts with Dmand AI profiles that report each measure.
Dr. Yi'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. Yi and other ophthalmologists in Massachusetts.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. David Hyungjun Yi treated 1,466 Medicare patients in 2024, average age 76
CMS counts 1,466 Medicare patients who saw Dr. Yi in 2024. The largest group is 75 to 84, with 638 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 14% are also on Medicaid. Their average risk score is 1.07, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Yi's median patient age at 73, with 59% women.
Dr. Yi's Medicare patients by age, 2024
Dr. Yi's Medicare patients by sex, 2024
- Women93864%
- Men52836%
Chronic conditions among Dr. Yi's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis41%
- Chronic kidney disease32%
- Diabetes26%
- Anxiety25%
- Ischemic heart disease24%
- Mood disorders21%
Share of Medicare patients with each condition. A patient can have several.
Dr. Yi's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
Patient panel by sex, all payers
- Women59%
- Men40%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. David Hyungjun Yi wrote 2,950 Medicare Part D claims in 2024
In 2024, Dr. Yi wrote 2,950 Medicare Part D claims for 667 patients. 68% of them were for generic drugs. CMS names the drug for 2,803 of them, across 28 drugs with 11 or more claims each, at $387,926 in total drug cost. In 2023, CMS named 2,400 claims across 29 drugs.
Dr. Yi's Part D claims by kind of drug, 2024
- Generic2,003 claims68%
- Brand-name947 claims32%
Dr. Yi'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.
Drug classes CMS tracks in Dr. Yi's Part D claims, 2024
- Antibiotics2%45 of 2,950 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 2,4002024: 2,80317%
Drugs named by CMS: 28 in 2024, 29 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. David Hyungjun Yi ranks in the 95th percentile for cataract surgery in Medicare
Dr. Yi accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 500 procedures of cataract surgery by Dr. Yi, more than 95% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Yi ranks in Medicare procedure volume
- Cataract surgery
- 95th percentile500 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. David Hyungjun Yi received $3,072 in industry payments from 2016 to 2025
CMS Open Payments shows 79 general payments to Dr. Yi from 16 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 69% of the total. Carl Zeiss Meditec, Inc. paid the most, $855.
General payments to Dr. Yi by program year, 2016 to 2025
General payments to Dr. Yi by kind, 2016 to 2025
- Food and beverage$2,13569%
- Gifts$90029%
- Education$381%
Companies that paid Dr. Yi 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. David Hyungjun Yi graduated from Baylor College of Medicine
Dr. Yi graduated from Baylor College of Medicine in 1997.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. David Hyungjun Yi'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)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 |
| 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. David Hyungjun Yi
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. David Hyungjun Yi's NPI number?
Dr. David Hyungjun Yi's NPI number is 1003808197. It was assigned on August 16, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. David Hyungjun Yi?
Dr. David Hyungjun Yi is an ophthalmologist in Tewksbury, Massachusetts. The primary specialty in the NPI Registry is Ophthalmology Physician (taxonomy code 207W00000X).
Where does Dr. David Hyungjun Yi practice?
Dr. Yi practices at 500 Clark Rd, Tewksbury, MA 01876. Dr. Yi's primary practice is Massachusetts Eye Associates in Tewksbury, Massachusetts. Dmand AI also links Dr. Yi to 1 group practice or clinic and 1 medical group.
What is Dr. David Hyungjun Yi's office phone number?
The practice phone on file for Dr. Yi is (978) 256-5600.
What is Dr. David Hyungjun Yi's medical license number?
Dr. Yi holds Massachusetts license 209741.
Which hospitals is Dr. David Hyungjun Yi affiliated with?
Dr. Yi is affiliated with Lowell General Hospital.
Does Dr. David Hyungjun Yi accept Medicare?
Yes. CMS data shows Dr. Yi billed Medicare for 3,236 services in 2024, and Dr. Yi accepts Medicare assignment.
How many Medicare patients does Dr. David Hyungjun Yi see?
CMS counts 1,466 Medicare patients who saw Dr. Yi in 2024, with an average age of 76.
What services does Dr. David Hyungjun Yi bill to Medicare?
In 2024, Dr. Yi's most billed Medicare services were eye exam or test (92014), office visit, established patient (99213) and surgery: eye (66984).
Where did Dr. David Hyungjun Yi go to medical school?
Dr. Yi graduated from Baylor College of Medicine in 1997.
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What drugs does Dr. David Hyungjun Yi prescribe most?
In 2024 Medicare Part D data, Dr. Yi's most prescribed drugs by claims were Latanoprost, Prednisolone Acetate and Dorzolamide-Timolol.
Has Dr. David Hyungjun Yi received payments from drug or device companies?
CMS Open Payments shows $3,072 in general payments to Dr. Yi from 16 companies from 2016 to 2025. The largest total came from Carl Zeiss Meditec, Inc.
How long has Dr. David Hyungjun Yi been practicing?
Dr. Yi graduated from medical school in 1997, 29 years ago.
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