Dr. Katherine E. Duncan, MD
- Medicare services, 2024
- 2,365
- Medicare patients, 2024
- 1,199
- Part D claims, 2024
- 841
- Hospital affiliations
- 1
- Industry payments
- $2,251
- Practice address
- 110 West Road Suite 229, Towson, MD 21204
- Practice phone
- Call (410) 825-3131
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Northern Baltimore Surgery Center
Surgery Center - Medicare-Certified · Towson, Maryland
Find Dr. Duncan's professional email, personal email and mobile number
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Dr. Katherine E. Duncan is an ophthalmologist in Towson, Maryland
Dr. Duncan practices at Northern Baltimore Surgery Center in Towson, Maryland.
Dr. Duncan's NPI, 1407113566, was assigned on April 13, 2012. Dr. Duncan graduated from University of Maryland School of Medicine in 2012. Dr. Duncan holds Maryland license D83693.
- NPI
- 1407113566NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8022267871
- NPI enumeration date
- April 13, 2012
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (410) 825-3131
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 40
- Medical school graduation
- 2012
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Katherine E. Duncan practices at Northern Baltimore Surgery Center in Towson, Maryland
Dr. Duncan's primary practice is Northern Baltimore Surgery Center, at 110 West Road Suite 229, Towson, MD 21204. The practice phone is (410) 825-3131.
- Northern Baltimore Surgery Center110 West Road Suite 229, Towson, MD 21204Phone(410) 825-3131
Source: Dmand AI Affiliation Data
Dr. Katherine E. Duncan is affiliated with 4 sites of care and 2 medical groups
Dr. Duncan's primary practice is Northern Baltimore Surgery Center in Towson, Maryland. Dr. Duncan is also affiliated with Greater Baltimore Medical Center. The medical group on file is Greater Baltimore Medical Center (GBMC). Dmand AI also links Dr. Duncan to 2 more group practices and clinics 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. Katherine E. Duncan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Duncan practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Northern Baltimore Surgery Center | Available with a free account |
| +3 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Katherine E. Duncan is one of 471 ophthalmologists in Maryland
Ophthalmology is Dr. Duncan's primary specialty in the NPI Registry, under taxonomy code 207W00000X. Dmand AI has Dr. Duncan's licenses on file in 2 states: Maryland and Pennsylvania.
Specialties and state licenses
- Ophthalmology, MarylandPrimary
- Pennsylvania license
Ophthalmologists near Dr. Duncan
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. Katherine E. Duncan billed Medicare for 2,365 services in 2024
CMS data shows 2,365 Medicare services from Dr. Duncan across 15 procedure codes in 2024, for 1,199 Medicare patients. Medicare paid $245,003 for them.
Dr. Duncan's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 1,0332024: 1,32328%
- Office and hospital visits
- 2023: 4752024: 67642%
- Surgery
- 2023: 1552024: 22847%
- Imaging
- 2023: 632024: 138119%
Where Dr. Duncan's Medicare services took place, 2024
- In an office2,15191%
- In a facility2149%
Dr. Duncan compared with the Maryland median for ophthalmologists, 2024
- Dr. Duncan
- Maryland median
- Medicare services
- 2,365vs 1,38870% above
- Medicare patients
- 1,199vs 62392% above
- Part D claims
- 739vs 38094% above
Medians across 487 ophthalmologists in Maryland with Dmand AI profiles that report each measure.
Dr. Duncan'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. Duncan and other ophthalmologists in Maryland.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Katherine E. Duncan treated 1,199 Medicare patients in 2024, average age 76
CMS counts 1,199 Medicare patients who saw Dr. Duncan in 2024. The largest group is 75 to 84, with 507 patients. 75% of them have high cholesterol, and 69% have high blood pressure. 5% are also on Medicaid. Their average risk score is 0.91, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Duncan's median patient age at 75, with 60% women.
Dr. Duncan's Medicare patients by age, 2024
Dr. Duncan's Medicare patients by sex, 2024
- Women79566%
- Men40434%
Chronic conditions among Dr. Duncan's Medicare patients, 2024
- High cholesterol75%
- High blood pressure69%
- Arthritis47%
- Diabetes24%
- Ischemic heart disease24%
- Osteoporosis21%
- Anxiety20%
- Mood disorders20%
Share of Medicare patients with each condition. A patient can have several.
Dr. Duncan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 75
Patient panel by sex, all payers
- Women60%
- Men40%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Katherine E. Duncan wrote 841 Medicare Part D claims in 2024
In 2024, Dr. Duncan wrote 841 Medicare Part D claims for 279 patients. 69% of them were for generic drugs. CMS names the drug for 739 of them, across 14 drugs with 11 or more claims each, at $31,536 in total drug cost. In 2023, CMS named 682 claims across 17 drugs.
Dr. Duncan's Part D claims by kind of drug, 2024
- Generic578 claims69%
- Brand-name263 claims31%
Dr. Duncan'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: 6822024: 7398%
Drugs named by CMS: 14 in 2024, 17 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. Katherine E. Duncan ranks in the 83rd percentile for cataract surgery in Medicare
Dr. Duncan accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 195 procedures of cataract surgery by Dr. Duncan, more than 83% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Duncan ranks in Medicare procedure volume
- Cataract surgery
- 83rd percentile195 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. Katherine E. Duncan received $2,251 in industry payments from 2016 to 2025
CMS Open Payments shows 95 general payments to Dr. Duncan from 28 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 97% of the total. Horizon Pharma plc paid the most, $441.
General payments to Dr. Duncan by program year, 2016 to 2025
General payments to Dr. Duncan by kind, 2016 to 2025
- Food and beverage$2,19297%
- Education$402%
- Gifts$191%
Companies that paid Dr. Duncan 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. Katherine E. Duncan graduated from University of Maryland School of Medicine
Dr. Duncan graduated from University of Maryland School of Medicine in 2012.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Katherine E. Duncan'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 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. Katherine E. Duncan
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. Katherine E. Duncan's NPI number?
Dr. Katherine E. Duncan's NPI number is 1407113566. It was assigned on April 13, 2012, and it is active in the NPI Registry.
What kind of doctor is Dr. Katherine E. Duncan?
Dr. Katherine E. Duncan is an ophthalmologist in Towson, Maryland. The primary specialty in the NPI Registry is Ophthalmology Physician (taxonomy code 207W00000X).
Where does Dr. Katherine E. Duncan practice?
Dr. Duncan practices at 110 West Road Suite 229, Towson, MD 21204. Dr. Duncan's primary practice is Northern Baltimore Surgery Center in Towson, Maryland. Dmand AI also links Dr. Duncan to 2 group practices and clinics and 1 medical group.
What is Dr. Katherine E. Duncan's office phone number?
The practice phone on file for Dr. Duncan is (410) 825-3131.
What is Dr. Katherine E. Duncan's medical license number?
Dr. Duncan holds Maryland license D83693, one of the licenses on file in 2 states.
Which states has Dr. Katherine E. Duncan been licensed in?
Dmand AI has state licenses on file for Dr. Duncan in Maryland and Pennsylvania.
Which hospitals is Dr. Katherine E. Duncan affiliated with?
Dr. Duncan is affiliated with Greater Baltimore Medical Center.
What medical group is Dr. Katherine E. Duncan part of?
Dr. Duncan is linked to Greater Baltimore Medical Center (GBMC). Dmand AI links Dr. Duncan to 1 more medical group.
Does Dr. Katherine E. Duncan accept Medicare?
Yes. CMS data shows Dr. Duncan billed Medicare for 2,365 services in 2024, and Dr. Duncan accepts Medicare assignment.
How many Medicare patients does Dr. Katherine E. Duncan see?
CMS counts 1,199 Medicare patients who saw Dr. Duncan in 2024, with an average age of 76.
Show 5 more questionsShow fewer questions
What services does Dr. Katherine E. Duncan bill to Medicare?
In 2024, Dr. Duncan's most billed Medicare services were eye exam or test (92014), office visit, established patient (99213) and office visit, established patient (99214).
Where did Dr. Katherine E. Duncan go to medical school?
Dr. Duncan graduated from University of Maryland School of Medicine in 2012.
What drugs does Dr. Katherine E. Duncan prescribe most?
In 2024 Medicare Part D data, Dr. Duncan's most prescribed drugs by claims were Latanoprost, Erythromycin and Dorzolamide-Timolol.
Has Dr. Katherine E. Duncan received payments from drug or device companies?
CMS Open Payments shows $2,251 in general payments to Dr. Duncan from 28 companies from 2016 to 2025. The largest total came from Horizon Pharma plc.
How long has Dr. Katherine E. Duncan been practicing?
Dr. Duncan graduated from medical school in 2012, 14 years ago.
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