Dr. Donald James McMahon, DO
- Medicare services, 2024
- 293
- Medicare patients, 2024
- 208
- Part D claims, 2024
- 555
- MIPS score, 2024
- 100
- Hospital affiliations
- 1
- Practice address
- 405 Hurffville Cross Keys Road, Suite 210, Sewell, NJ 08080
- Practice phone
- Call (856) 582-2072
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Select Surgical Center at Kennedy
Surgery Center - Medicare-Certified · Sewell, New Jersey
Find Dr. McMahon'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. Donald James McMahon is a gastroenterologist in Sewell, New Jersey
Dr. McMahon practices at Select Surgical Center at Kennedy in Sewell, New Jersey.
Dr. McMahon's NPI, 1285824839, was assigned on July 30, 2007. Dr. McMahon graduated from Lake Erie College of Osteopathic Medicine, Erie in 2004. Dr. McMahon holds New Jersey license 25MB0862200.
- NPI
- 1285824839NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6608990007
- NPI enumeration date
- July 30, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (856) 582-2072
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 48
- Medical school graduation
- 2004
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Donald James McMahon practices at Select Surgical Center at Kennedy in Sewell, New Jersey
Dr. McMahon's primary practice is Select Surgical Center at Kennedy, at 405 Hurffville Cross Keys Road, Suite 210, Sewell, NJ 08080. The practice phone is (856) 582-2072.
- Select Surgical Center at Kennedy405 Hurffville Cross Keys Road, Suite 210, Sewell, NJ 08080Phone(856) 582-2072
Source: Dmand AI Affiliation Data
Dr. Donald James McMahon is affiliated with 3 sites of care and 1 medical group
Dr. McMahon's primary practice is Select Surgical Center at Kennedy in Sewell, New Jersey. Dr. McMahon is also affiliated with Cooper University Hospital. The medical group on file is Cooper Care Alliance. Dmand AI also links Dr. McMahon to 1 more group practice or clinic, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Donald James McMahon's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. McMahon practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Select Surgical Center at Kennedy | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Donald James McMahon is one of 691 gastroenterologists in New Jersey
Gastroenterology is Dr. McMahon's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. McMahon is licensed in New Jersey.
Specialties and state licenses
- Gastroenterology, New JerseyPrimary
Gastroenterologists near Dr. McMahon
Counts of gastroenterologists 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. Donald James McMahon billed Medicare for 293 services in 2024
CMS data shows 293 Medicare services from Dr. McMahon across 8 procedure codes in 2024, for 208 Medicare patients. Medicare paid $33,309 for them.
Dr. McMahon's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1852024: 1924%
- Surgery
- 2023: 1082024: 1016%
Where Dr. McMahon's Medicare services took place, 2024
- In an office19266%
- In a facility10134%
Dr. McMahon compared with the New Jersey median for gastroenterologists, 2024
- Dr. McMahon
- New Jersey median
- Medicare services
- 293vs 68557% below
- Medicare patients
- 208vs 37545% below
- Part D claims
- 392vs 61136% below
Medians across 674 gastroenterologists in New Jersey with Dmand AI profiles that report each measure.
Dr. McMahon'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. McMahon and other gastroenterologists in New Jersey.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Donald James McMahon treated 208 Medicare patients in 2024, average age 71
CMS counts 208 Medicare patients who saw Dr. McMahon in 2024. The largest group is 65 to 74, with 122 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 8% are also on Medicaid. Their average risk score is 0.98, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. McMahon's median patient age at 62, with 46% women.
Dr. McMahon's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. McMahon's Medicare patients by sex, 2024
- Women9345%
- Men11555%
Chronic conditions among Dr. McMahon's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis45%
- Diabetes32%
- Anxiety27%
- Ischemic heart disease26%
- Chronic kidney disease19%
- Mood disorders16%
Share of Medicare patients with each condition. A patient can have several.
Dr. McMahon's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 62
Patient panel by sex, all payers
- Women46%
- Men52%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Donald James McMahon wrote 555 Medicare Part D claims in 2024
In 2024, Dr. McMahon wrote 555 Medicare Part D claims for 142 patients. 76% of them were for generic drugs. CMS names the drug for 392 of them, across 11 drugs with 11 or more claims each, at $319,498 in total drug cost. In 2023, CMS named 303 claims across 12 drugs.
Dr. McMahon's Part D claims by kind of drug, 2024
- Generic424 claims76%
- Brand-name131 claims24%
Dr. McMahon'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. McMahon's Part D claims, 2024
- Antibiotics3%17 of 555 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: 3032024: 39229%
Drugs named by CMS: 11 in 2024, 12 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. Donald James McMahon scored 100 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 100 out of 100 for Dr. McMahon for performance year 2024, reported through an alternative payment model (APM). Dr. McMahon accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 36 procedures of colonoscopy by Dr. McMahon, more than 57% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Dr. McMahon's MIPS scores, performance year 2024
- 100of 100Final score
- 81.6of 100Quality
- 99of 100Promoting Interoperability
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Where Dr. McMahon ranks in Medicare procedure volume
- Colonoscopy
- 57th percentile36 procedures
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 48th percentile18 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. Donald James McMahon received $740 in industry payments from 2016 to 2023
CMS Open Payments shows 38 general payments to Dr. McMahon from 13 drug and device companies from 2016 to 2023. Food and beverage make up the largest share, 98% of the total. Abbvie Inc. paid the most, $202.
General payments to Dr. McMahon by program year, 2016 to 2023
General payments to Dr. McMahon by kind, 2016 to 2023
- Food and beverage$72498%
- Education$162%
Companies that paid Dr. McMahon 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. Donald James McMahon graduated from Lake Erie College of Osteopathic Medicine, Erie
Dr. McMahon graduated from Lake Erie College of Osteopathic Medicine, Erie in 2004.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Donald James McMahon'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)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 |
| 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. Donald James McMahon
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. Donald James McMahon's NPI number?
Dr. Donald James McMahon's NPI number is 1285824839. It was assigned on July 30, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Donald James McMahon?
Dr. Donald James McMahon is a gastroenterologist in Sewell, New Jersey. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. Donald James McMahon practice?
Dr. McMahon practices at 405 Hurffville Cross Keys Road, Suite 210, Sewell, NJ 08080. Dr. McMahon's primary practice is Select Surgical Center at Kennedy in Sewell, New Jersey. Dmand AI also links Dr. McMahon to 1 group practice or clinic.
What is Dr. Donald James McMahon's office phone number?
The practice phone on file for Dr. McMahon is (856) 582-2072.
What is Dr. Donald James McMahon's medical license number?
Dr. McMahon holds New Jersey license 25MB0862200.
Which hospitals is Dr. Donald James McMahon affiliated with?
Dr. McMahon is affiliated with Cooper University Hospital.
What medical group is Dr. Donald James McMahon part of?
Dr. McMahon is linked to Cooper Care Alliance.
Does Dr. Donald James McMahon accept Medicare?
Yes. CMS data shows Dr. McMahon billed Medicare for 293 services in 2024, and Dr. McMahon accepts Medicare assignment.
What is Dr. Donald James McMahon's MIPS score?
Dr. McMahon's MIPS final score for performance year 2024 is 100 out of 100, reported through an alternative payment model (APM).
How many Medicare patients does Dr. Donald James McMahon see?
CMS counts 208 Medicare patients who saw Dr. McMahon in 2024, with an average age of 71.
Show 5 more questionsShow fewer questions
What services does Dr. Donald James McMahon bill to Medicare?
In 2024, Dr. McMahon's most billed Medicare services were office visit, new patient (99203), office visit, established patient (99213) and surgery: digestive system (45378).
Where did Dr. Donald James McMahon go to medical school?
Dr. McMahon graduated from Lake Erie College of Osteopathic Medicine, Erie in 2004.
What drugs does Dr. Donald James McMahon prescribe most?
In 2024 Medicare Part D data, Dr. McMahon's most prescribed drugs by claims were Omeprazole, Famotidine and Pantoprazole Sodium.
Has Dr. Donald James McMahon received payments from drug or device companies?
CMS Open Payments shows $740 in general payments to Dr. McMahon from 13 companies from 2016 to 2023. The largest total came from Abbvie Inc.
How long has Dr. Donald James McMahon been practicing?
Dr. McMahon graduated from medical school in 2004, 22 years ago.
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