Dr. Margaret Mary Duffy, MD
- Medicare services, 2024
- 2,356
- Medicare patients, 2024
- 568
- Part D claims, 2024
- 1,345
- Publications
- 3
- Hospital affiliations
- 5
- Practice address
- 1230 S Cedar Crest Blvd, Allentown, PA 18103
- Practice phone
- Call (610) 295-1046
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Kidney Care Specialists
Allentown, Pennsylvania
Find Dr. Duffy'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. Margaret Mary Duffy is a nephrologist in Allentown, Pennsylvania
Dr. Duffy practices at Kidney Care Specialists in Allentown, Pennsylvania.
Dr. Duffy's NPI, 1518233881, was assigned on March 30, 2012. Dr. Duffy graduated from Rutgers New Jersey Medical School in 2012. Dr. Duffy holds Pennsylvania license MD461963.
- NPI
- 1518233881NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6709176035
- NPI enumeration date
- March 30, 2012
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (610) 295-1046
- 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 Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Margaret Mary Duffy practices at Kidney Care Specialists in Allentown, Pennsylvania
Dr. Duffy's primary practice is Kidney Care Specialists, at 1230 S Cedar Crest Blvd, Allentown, PA 18103 in Lehigh County. The practice phone is (610) 295-1046.
- Kidney Care Specialists1230 S Cedar Crest Blvd, Allentown, PA 18103 · Lehigh CountyPhone(610) 295-1046
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Margaret Mary Duffy is affiliated with 9 sites of care and 2 medical groups
Dr. Duffy's primary practice is Kidney Care Specialists in Allentown, Pennsylvania. Dr. Duffy is also affiliated with Lehigh Valley Hospital-Cedar Crest. The medical group on file is Valley Kidney Specialists. Dmand AI also links Dr. Duffy to 4 more hospitals, 2 group practices and clinics, 1 dialysis center 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. Margaret Mary Duffy's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Duffy practices, 8 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Kidney Care Specialists | Available with a free account |
| +8 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Margaret Mary Duffy is one of 552 nephrologists in Pennsylvania
Nephrology is Dr. Duffy's primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dr. Duffy is licensed in Pennsylvania.
Specialties and state licenses
- Nephrology, PennsylvaniaPrimary
Nephrologists near Dr. Duffy
Counts of nephrologists 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. Margaret Mary Duffy billed Medicare for 2,356 services in 2024
CMS data shows 2,356 Medicare services from Dr. Duffy across 10 procedure codes in 2024, for 568 Medicare patients. Medicare paid $89,292 for them.
Dr. Duffy's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 7512024: 1,14853%
- Other services
- 2023: 2472024: 1,039321%
- Tests and treatments
- 2023: 1812024: 1697%
Where Dr. Duffy's Medicare services took place, 2024
- In an office1,54065%
- In a facility81635%
Dr. Duffy compared with the Pennsylvania median for nephrologists, 2024
- Dr. Duffy
- Pennsylvania median
- Medicare services
- 2,356vs 7723.1 times
- Medicare patients
- 568vs 2752.1 times
- Part D claims
- 1,132vs 5522.1 times
Medians across 548 nephrologists in Pennsylvania with Dmand AI profiles that report each measure.
Dr. Duffy'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. Duffy and other nephrologists in Pennsylvania.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Margaret Mary Duffy treated 568 Medicare patients in 2024, average age 75
CMS counts 568 Medicare patients who saw Dr. Duffy in 2024. The largest group is 75 to 84, with 208 patients. 75% of them have chronic kidney disease, and 75% have high blood pressure. 20% are also on Medicaid. Their average risk score is 3.82, 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. Duffy's median patient age at 71, with 50% women.
Dr. Duffy's Medicare patients by age, 2024
Dr. Duffy's Medicare patients by sex, 2024
- Women27849%
- Men29051%
Chronic conditions among Dr. Duffy's Medicare patients, 2024
- Chronic kidney disease75%
- High blood pressure75%
- High cholesterol75%
- Diabetes63%
- Heart failure59%
- Arthritis56%
- Ischemic heart disease56%
- Atrial fibrillation46%
Share of Medicare patients with each condition. A patient can have several.
Dr. Duffy'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
- Women50%
- Men48%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Margaret Mary Duffy wrote 1,345 Medicare Part D claims in 2024
In 2024, Dr. Duffy wrote 1,345 Medicare Part D claims for 193 patients. 82% of them were for generic drugs. CMS names the drug for 1,132 of them, across 32 drugs with 11 or more claims each, at $226,986 in total drug cost. In 2023, CMS named 823 claims across 25 drugs.
Dr. Duffy's Part D claims by kind of drug, 2024
- Generic1,100 claims82%
- Brand-name and other245 claims18%
Dr. Duffy'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: 8232024: 1,13238%
Drugs named by CMS: 32 in 2024, 25 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. Margaret Mary Duffy offers telehealth to Medicare patients
Dr. Duffy accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Duffy as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Margaret Mary Duffy has 3 publications on record
Dmand AI links 3 papers to Dr. Duffy, published from 2014 to 2015. Dr. Duffy's most frequent co-authors are Shashank Jain, MD, Sharon Eileen Maynard, MD and Victor Joseph Mazza, MD.
Dr. Duffy's most frequent co-authors
- Shashank Jain, MD1 shared paper
- Sharon Eileen Maynard, MD1 shared paper
- Victor Joseph Mazza, MD1 shared paper
Recent publications by Dr. Duffy
Adv Chronic Kidney Dis
See who Dr. Duffy researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Duffy works with, so you can find a warm path to the right nephrologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Margaret Mary Duffy received $2,548 in industry payments from 2017 to 2025
CMS Open Payments shows 46 general payments to Dr. Duffy from 17 drug and device companies from 2017 to 2025. Food and beverage make up the largest share, 95% of the total. Relypsa, Inc. paid the most, $560.
General payments to Dr. Duffy by program year, 2017 to 2025
General payments to Dr. Duffy by kind, 2017 to 2025
- Food and beverage$2,43395%
- Education$1165%
Companies that paid Dr. Duffy the most, 2017 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Margaret Mary Duffy graduated from Rutgers New Jersey Medical School
Dr. Duffy graduated from Rutgers New Jersey Medical School in 2012.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Margaret Mary Duffy'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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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. Margaret Mary Duffy
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. Margaret Mary Duffy's NPI number?
Dr. Margaret Mary Duffy's NPI number is 1518233881. It was assigned on March 30, 2012, and it is active in the NPI Registry.
What kind of doctor is Dr. Margaret Mary Duffy?
Dr. Margaret Mary Duffy is a nephrologist in Allentown, Pennsylvania. The primary specialty in the NPI Registry is Nephrology Physician (taxonomy code 207RN0300X).
Where does Dr. Margaret Mary Duffy practice?
Dr. Duffy practices at 1230 S Cedar Crest Blvd, Allentown, PA 18103. Dr. Duffy's primary practice is Kidney Care Specialists in Allentown, Pennsylvania. Dmand AI also links Dr. Duffy to 4 hospitals, 2 group practices and clinics, 1 dialysis center and 1 medical group.
What is Dr. Margaret Mary Duffy's office phone number?
The practice phone on file for Dr. Duffy is (610) 295-1046.
What is Dr. Margaret Mary Duffy's medical license number?
Dr. Duffy holds Pennsylvania license MD461963.
Which hospitals is Dr. Margaret Mary Duffy affiliated with?
Dr. Duffy is affiliated with Lehigh Valley Hospital-Cedar Crest. Dmand AI links Dr. Duffy to 4 more hospitals.
What medical group is Dr. Margaret Mary Duffy part of?
Dr. Duffy is linked to Valley Kidney Specialists. Dmand AI links Dr. Duffy to 1 more medical group.
Does Dr. Margaret Mary Duffy accept Medicare?
Yes. CMS data shows Dr. Duffy billed Medicare for 2,356 services in 2024, and Dr. Duffy accepts Medicare assignment.
Does Dr. Margaret Mary Duffy offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Duffy as offering telehealth services.
How many Medicare patients does Dr. Margaret Mary Duffy see?
CMS counts 568 Medicare patients who saw Dr. Duffy in 2024, with an average age of 75.
Show 7 more questionsShow fewer questions
What services does Dr. Margaret Mary Duffy bill to Medicare?
In 2024, Dr. Duffy's most billed Medicare services were medicare temporary code (Q5106), hospital inpatient care (99232) and office visit, established patient (99214).
Where did Dr. Margaret Mary Duffy go to medical school?
Dr. Duffy graduated from Rutgers New Jersey Medical School in 2012.
What drugs does Dr. Margaret Mary Duffy prescribe most?
In 2024 Medicare Part D data, Dr. Duffy's most prescribed drugs by claims were Farxiga, Losartan Potassium and Amlodipine Besylate.
Has Dr. Margaret Mary Duffy received payments from drug or device companies?
CMS Open Payments shows $2,548 in general payments to Dr. Duffy from 17 companies from 2017 to 2025. The largest total came from Relypsa, Inc.
How long has Dr. Margaret Mary Duffy been practicing?
Dr. Duffy graduated from medical school in 2012, 14 years ago.
Does Dr. Margaret Mary Duffy do research?
Dmand AI links 3 publications to Dr. Duffy, published from 2014 to 2015.
Who does Dr. Margaret Mary Duffy publish with?
Dr. Duffy's most frequent co-authors are Shashank Jain, MD (1 shared paper), Sharon Eileen Maynard, MD (1 shared paper) and Victor Joseph Mazza, MD (1 shared paper).
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