Dr. Lan Chang, MD
- Medicare services, 2023
- 121
- Part D claims, 2024
- 317
- Industry payments
- $507
- Affiliated sites
- 2
- Medical groups
- 2
- Practice address
- 10810 Connecticut Avenue, Kensington, MD 20895
- Practice phone
- Call (301) 929-7275
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Kensington Ambulatory Surgery Center
Surgery Center - Medicare-Certified · Kensington, Maryland
Find Dr. Chang's professional email, personal email and mobile number
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Dr. Lan Chang is an ophthalmologist in Kensington, Maryland
Dr. Chang practices at Kensington Ambulatory Surgery Center in Kensington, Maryland.
Dr. Chang's NPI, 1871792002, was assigned on July 17, 2007. Dr. Chang graduated from University of Michigan Medical School in 2007. Dr. Chang holds New Mexico license MD2012-0458.
- NPI
- 1871792002NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2567618853
- NPI enumeration date
- July 17, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (301) 929-7275
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 45
- Medical school graduation
- 2007
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Lan Chang practices at Kensington Ambulatory Surgery Center in Kensington, Maryland
Dr. Chang's primary practice is Kensington Ambulatory Surgery Center, at 10810 Connecticut Avenue, Kensington, MD 20895. The practice phone is (301) 929-7275.
- Kensington Ambulatory Surgery Center10810 Connecticut Avenue, Kensington, MD 20895Phone(301) 929-7275
Source: Dmand AI Affiliation Data
Dr. Lan Chang is affiliated with 2 sites of care and 2 medical groups
Dr. Chang's primary practice is Kensington Ambulatory Surgery Center in Kensington, Maryland. The medical group on file is Mid-Atlantic Permanente Medical Group. Dmand AI also links Dr. Chang to 1 more group practice or clinic and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Lan Chang's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chang practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Kensington Ambulatory Surgery Center | 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. Lan Chang is one of 471 ophthalmologists in Maryland
Ophthalmology is Dr. Chang's primary specialty in the NPI Registry, under taxonomy code 207W00000X. Dmand AI has Dr. Chang's licenses on file in 2 states: New Mexico and Pennsylvania.
Specialties and state licenses
- Ophthalmology, New MexicoPrimary
- Internal medicine, Pennsylvania
Ophthalmologists near Dr. Chang
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. Lan Chang billed Medicare for 121 services in 2023
CMS data shows 121 Medicare services from Dr. Chang across 3 procedure codes in 2023. Medicare paid $7,062 for them. Every service was in an office.
Dr. Chang's Medicare services by type, 2022 to 2023
- 2022
- 2023
- Office and hospital visits
- 2022: 2932023: 9767%
- Tests and treatments
- 2022: 1342023: 2482%
- Surgery
- 2022: 1022023: 0100%
Dr. Chang compared with the Maryland median for ophthalmologists, 2023
- Dr. Chang
- Maryland median
- Medicare services
- 121vs 1,38891% below
- Part D claims
- 276vs 38027% below
Medians across 487 ophthalmologists in Maryland with Dmand AI profiles that report each measure.
Dr. Chang's most billed Medicare procedure codes, 2023
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. Chang and other ophthalmologists in Maryland.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Lan Chang's patients have a median age of 10
Across all payers, Dmand AI patient panel data puts Dr. Chang's median patient age at 10, with 55% women.
Dr. Chang's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 10
Patient panel by sex, all payers
- Women55%
- Men45%
Source: Dmand AI Patient Panel Data
Dr. Lan Chang wrote 317 Medicare Part D claims in 2024
In 2024, Dr. Chang wrote 317 Medicare Part D claims for 118 patients. 58% of them were for generic drugs. CMS names the drug for 276 of them, across 4 drugs with 11 or more claims each, at $7,972 in total drug cost. In 2023, CMS named 79 claims across 3 drugs.
Dr. Chang's Part D claims by kind of drug, 2024
- Generic185 claims58%
- Brand-name132 claims42%
Dr. Chang'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: 792024: 276249%
Drugs named by CMS: 4 in 2024, 3 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
How Dr. Lan Chang takes part in Medicare
Dr. Chang accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Cataract surgery: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Lan Chang received $507 in industry payments from 2016 to 2023
CMS Open Payments shows 11 general payments to Dr. Chang from 4 drug and device companies from 2016 to 2023. Food and beverage make up the largest share, 79% of the total. Horizon Pharma plc paid the most, $281.
General payments to Dr. Chang by program year, 2016 to 2023
General payments to Dr. Chang by kind, 2016 to 2023
- Food and beverage$39979%
- Education$10821%
Companies that paid Dr. Chang the most, 2016 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Lan Chang graduated from University of Michigan Medical School
Dr. Chang graduated from University of Michigan Medical School in 2007.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Lan Chang'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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy 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 Data |
| 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. Lan Chang
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. Lan Chang's NPI number?
Dr. Lan Chang's NPI number is 1871792002. It was assigned on July 17, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Lan Chang?
Dr. Lan Chang is an ophthalmologist in Kensington, Maryland. The primary specialty in the NPI Registry is Ophthalmology Physician (taxonomy code 207W00000X).
Where does Dr. Lan Chang practice?
Dr. Chang practices at 10810 Connecticut Avenue, Kensington, MD 20895. Dr. Chang's primary practice is Kensington Ambulatory Surgery Center in Kensington, Maryland. Dmand AI also links Dr. Chang to 1 group practice or clinic and 1 medical group.
What is Dr. Lan Chang's office phone number?
The practice phone on file for Dr. Chang is (301) 929-7275.
What is Dr. Lan Chang's medical license number?
Dr. Chang holds New Mexico license MD2012-0458, one of the licenses on file in 2 states.
Which states has Dr. Lan Chang been licensed in?
Dmand AI has state licenses on file for Dr. Chang in New Mexico and Pennsylvania.
What medical group is Dr. Lan Chang part of?
Dr. Chang is linked to Mid-Atlantic Permanente Medical Group. Dmand AI links Dr. Chang to 1 more medical group.
Does Dr. Lan Chang accept Medicare?
Yes. CMS data shows Dr. Chang billed Medicare for 121 services in 2023, and Dr. Chang accepts Medicare assignment.
What services does Dr. Lan Chang bill to Medicare?
In 2023, Dr. Chang's most billed Medicare services were office visit, established patient (99213), office visit, established patient (99214) and eye exam or test (92014).
Where did Dr. Lan Chang go to medical school?
Dr. Chang graduated from University of Michigan Medical School in 2007.
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What drugs does Dr. Lan Chang prescribe most?
In 2024 Medicare Part D data, Dr. Chang's most prescribed drugs by claims were Prednisolone Acetate, Moxifloxacin and Latanoprost.
Has Dr. Lan Chang received payments from drug or device companies?
CMS Open Payments shows $507 in general payments to Dr. Chang from 4 companies from 2016 to 2023. The largest total came from Horizon Pharma plc.
How long has Dr. Lan Chang been practicing?
Dr. Chang graduated from medical school in 2007, 19 years ago.
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