Dr. Stephen R. McMahon, MD
- Medicare services, 2024
- 418
- Medicare patients, 2024
- 165
- Part D claims, 2024
- 366
- Hospital affiliations
- 1
- Industry payments
- $251
- Practice address
- 850 Ed Hall, Kaufman, TX 75142
- Practice phone
- Call (972) 932-7200
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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Dr. Stephen R. McMahon is an internist in Kaufman, Texas
Dr. McMahon practices at Texas Health Kaufman in Kaufman, Texas, part of Texas Health Resources.
Dr. McMahon's NPI, 1225098957, was assigned on March 25, 2006. Dr. McMahon graduated from UT Southwestern Medical Center in 1976. Dr. McMahon holds Texas license E6514.
- NPI
- 1225098957NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5496763260
- NPI enumeration date
- March 25, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (972) 932-7200
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 76
- Medical school graduation
- 1976
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Stephen R. McMahon practices at Texas Health Kaufman in Kaufman, Texas
Dr. McMahon's primary practice is Texas Health Kaufman, at 850 Ed Hall, Kaufman, TX 75142 in Kaufman County. The practice phone is (972) 932-7200.
- Texas Health Kaufman850 Ed Hall, Kaufman, TX 75142 · Kaufman CountyPhone(972) 932-7200
Source: Dmand AI Affiliation Data
Dr. Stephen R. McMahon is affiliated with 1 site of care and 1 medical group
Dr. McMahon's primary practice is Texas Health Kaufman in Kaufman, Texas, part of Texas Health Resources. The medical group on file is Texas Health Physicians Group.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Stephen R. McMahon's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. McMahon practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Texas Health Kaufman | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Stephen R. McMahon is one of 8,437 internists in Texas
Internal medicine is Dr. McMahon's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. McMahon is board certified in internal medicine by the American Board of Internal Medicine. Dr. McMahon is licensed in Texas.
Specialties and state licenses
- Internal medicine, TexasPrimary
Clinical focus
Dmand AI lists acute respiratory failure, cardiac arrhythmia, cellulitis, chronic hypertension, congestive heart failure, electrolyte disorders, gastrointestinal infection and gastrointestinal inflammation among the conditions Dr. McMahon treats.
Internists near Dr. McMahon
Counts of internists 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. Stephen R. McMahon billed Medicare for 418 services in 2024
CMS data shows 418 Medicare services from Dr. McMahon across 3 procedure codes in 2024, for 165 Medicare patients. Medicare paid $29,575 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. McMahon's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 3112024: 41834%
Dr. McMahon compared with the Texas median for internists, 2024
- Dr. McMahon
- Texas median
- Medicare services
- 418vs 53922% below
- Medicare patients
- 165vs 19013% below
- Part D claims
- 236vs 28918% below
Medians across 7,794 internists in Texas 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.
Need commercial claims for Dr. McMahon?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. McMahon and other internists in Texas.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Stephen R. McMahon treated 165 Medicare patients in 2024, average age 75
CMS counts 165 Medicare patients who saw Dr. McMahon in 2024. The largest group is 75 to 84, with 71 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 24% are also on Medicaid. Their average risk score is 1.96, 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. McMahon's median patient age at 67, with 59% women.
Dr. McMahon's Medicare patients by age, 2024
Dr. McMahon's Medicare patients by sex, 2024
- Women9960%
- Men6640%
Chronic conditions among Dr. McMahon's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis56%
- Diabetes50%
- Heart failure47%
- COPD45%
- Ischemic heart disease44%
- Anxiety41%
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 67
Patient panel by sex, all payers
- Women59%
- Men41%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Stephen R. McMahon wrote 366 Medicare Part D claims in 2024
In 2024, Dr. McMahon wrote 366 Medicare Part D claims for 161 patients. 90% of them were for generic drugs. CMS names the drug for 236 of them, across 9 drugs with 11 or more claims each, at $12,378 in total drug cost. In 2023, CMS named 154 claims across 8 drugs.
Dr. McMahon's Part D claims by kind of drug, 2024
- Generic330 claims90%
- Brand-name36 claims10%
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
- Opioids4%16 of 366 claims
- Antibiotics34%125 of 366 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: 1542024: 23653%
Drugs named by CMS: 9 in 2024, 8 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. Stephen R. McMahon takes part in Medicare
Dr. McMahon accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Stephen R. McMahon received $251 in industry payments from 2016 to 2025
CMS Open Payments shows 7 general payments to Dr. McMahon from 4 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Boston Scientific Corporation paid the most, $94.
General payments to Dr. McMahon by program year, 2016 to 2025
Companies that paid Dr. McMahon 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. Stephen R. McMahon graduated from UT Southwestern Medical Center
Dr. McMahon graduated from UT Southwestern Medical Center in 1976.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Stephen R. McMahon accepts plans from 20 insurance carriers
Dr. McMahon is in network with 20 carriers, including Elevance, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 12. Check the plan with the practice before a visit.
- Elevance
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Aetna
- Cigna
- HCSC
- Alliant Health Plans
- Aspirus Health Plan
- +12 more carriersWith a free account
Plan types Dr. McMahon accepts, by number of carriers
- PPO12
- HMO11
- Medicare7
- POS5
- EPO4
Source: Dmand AI Insurance Network Data
Sources for Dr. Stephen R. 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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network 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. Stephen R. 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. Stephen R. McMahon's NPI number?
Dr. Stephen R. McMahon's NPI number is 1225098957. It was assigned on March 25, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Stephen R. McMahon?
Dr. Stephen R. McMahon is an internist in Kaufman, Texas. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Stephen R. McMahon practice?
Dr. McMahon practices at 850 Ed Hall, Kaufman, TX 75142. Dr. McMahon's primary practice is Texas Health Kaufman in Kaufman, Texas, part of Texas Health Resources.
What is Dr. Stephen R. McMahon's office phone number?
The practice phone on file for Dr. McMahon is (972) 932-7200.
What is Dr. Stephen R. McMahon's medical license number?
Dr. McMahon holds Texas license E6514.
Which hospitals is Dr. Stephen R. McMahon affiliated with?
Dr. McMahon practices at Texas Health Kaufman in Kaufman, Texas.
What medical group is Dr. Stephen R. McMahon part of?
Dr. McMahon is linked to Texas Health Physicians Group.
Does Dr. Stephen R. McMahon accept Medicare?
Yes. CMS data shows Dr. McMahon billed Medicare for 418 services in 2024, and Dr. McMahon accepts Medicare assignment.
How many Medicare patients does Dr. Stephen R. McMahon see?
CMS counts 165 Medicare patients who saw Dr. McMahon in 2024, with an average age of 75.
Is Dr. Stephen R. McMahon board certified?
Yes. Dr. McMahon is board certified in internal medicine by the American Board of Internal Medicine.
Show 6 more questionsShow fewer questions
What services does Dr. Stephen R. McMahon bill to Medicare?
In 2024, Dr. McMahon's most billed Medicare services were hospital inpatient care (99232), hospital inpatient care (99239) and hospital inpatient care (99222).
Where did Dr. Stephen R. McMahon go to medical school?
Dr. McMahon graduated from UT Southwestern Medical Center in 1976.
What drugs does Dr. Stephen R. McMahon prescribe most?
In 2024 Medicare Part D data, Dr. McMahon's most prescribed drugs by claims were Cefuroxime, Methylprednisolone and Potassium Chloride.
Has Dr. Stephen R. McMahon received payments from drug or device companies?
CMS Open Payments shows $251 in general payments to Dr. McMahon from 4 companies from 2016 to 2025. The largest total came from Boston Scientific Corporation.
How long has Dr. Stephen R. McMahon been practicing?
Dr. McMahon graduated from medical school in 1976, 50 years ago.
What insurance does Dr. Stephen R. McMahon accept?
Dr. McMahon is in network with 20 carriers, including Elevance, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 12. Check the plan with the practice before a visit.
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