Dr. Mary Kathryn McMahan, MD
- Medicare services, 2024
- 583
- Medicare patients, 2024
- 176
- Part D claims, 2024
- 325
- Hospital affiliations
- 2
- Industry payments
- $311
- Practice address
- 4700 Waters Avenue, Savannah, GA 31404
- Practice phone
- Call (912) 350-3691
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. McMahan's professional email, personal email and mobile number
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Dr. Mary Kathryn McMahan is an internist in Savannah, Georgia
Dr. McMahan practices at Memorial Health University Medical Center in Savannah, Georgia, part of HCA Healthcare.
Dr. McMahan's NPI, 1205021193, was assigned on September 13, 2007. Dr. McMahan holds Georgia license 062860.
- NPI
- 1205021193NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9032263371
- NPI enumeration date
- September 13, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (912) 350-3691
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 46
- Medical school graduation
- 2006
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Mary Kathryn McMahan practices at Memorial Health University Medical Center in Savannah, Georgia
Dr. McMahan's primary practice is Memorial Health University Medical Center, at 4700 Waters Avenue, Savannah, GA 31404 in Chatham County. The practice phone is (912) 350-3691.
- Memorial Health University Medical Center4700 Waters Avenue, Savannah, GA 31404 · Chatham CountyPhone(912) 350-3691
Source: Dmand AI Affiliation Data
Dr. Mary Kathryn McMahan is affiliated with 2 sites of care and 3 medical groups
Dr. McMahan's primary practice is Memorial Health University Medical Center in Savannah, Georgia, part of HCA Healthcare. Dr. McMahan is also affiliated with Appling Healthcare. The medical group on file is Sound Physicians. Dmand AI also links Dr. McMahan to 2 more medical groups, 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. Mary Kathryn McMahan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. McMahan practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Memorial Health University Medical Center | Available with a free account |
| +1 more site and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Mary Kathryn McMahan is one of 3,575 internists in Georgia
Internal medicine is Dr. McMahan's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. McMahan is licensed in Georgia.
Specialties and state licenses
- Internal medicine, GeorgiaPrimary
Internists near Dr. McMahan
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. Mary Kathryn McMahan billed Medicare for 583 services in 2024
CMS data shows 583 Medicare services from Dr. McMahan across 4 procedure codes in 2024, for 176 Medicare patients. Medicare paid $47,383 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. McMahan's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 3382024: 58372%
Dr. McMahan compared with the Georgia median for internists, 2024
- Dr. McMahan
- Georgia median
- Medicare services
- 583vs 5369% above
- Medicare patients
- 176vs 1949% below
- Part D claims
- 75vs 33978% below
Medians across 3,344 internists in Georgia with Dmand AI profiles that report each measure.
Dr. McMahan'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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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Mary Kathryn McMahan treated 176 Medicare patients in 2024, average age 74
CMS counts 176 Medicare patients who saw Dr. McMahan in 2024. The largest group is 65 to 74, with 57 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 33% are also on Medicaid. Their average risk score is 2.63, 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. McMahan's median patient age at 71, with 53% women.
Dr. McMahan's Medicare patients by age, 2024
Dr. McMahan's Medicare patients by sex, 2024
- Women8347%
- Men9353%
Chronic conditions among Dr. McMahan's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis51%
- Diabetes51%
- Chronic kidney disease48%
- Heart failure48%
- Ischemic heart disease45%
- Atrial fibrillation43%
Share of Medicare patients with each condition. A patient can have several.
Dr. McMahan'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
- Women53%
- Men46%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Mary Kathryn McMahan wrote 325 Medicare Part D claims in 2024
In 2024, Dr. McMahan wrote 325 Medicare Part D claims for 143 patients. 91% of them were for generic drugs. CMS names the drug for 75 of them, across 6 drugs with 11 or more claims each, at $6,863 in total drug cost. In 2023, CMS named 37 claims across 3 drugs.
Dr. McMahan's Part D claims by kind of drug, 2024
- Generic296 claims91%
- Brand-name and other29 claims9%
Dr. McMahan'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. McMahan's Part D claims, 2024
- Opioids10%32 of 325 claims
- Antibiotics15%49 of 325 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: 372024: 75103%
Drugs named by CMS: 6 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. Mary Kathryn McMahan takes part in Medicare
Dr. McMahan 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. Mary Kathryn McMahan received $311 in industry payments from 2016 to 2025
CMS Open Payments shows 11 general payments to Dr. McMahan from 8 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Neurocrine BioSciences, Inc. paid the most, $125.
General payments to Dr. McMahan by program year, 2016 to 2025
Companies that paid Dr. McMahan the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Mary Kathryn McMahan'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) |
| 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. Mary Kathryn McMahan
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. Mary Kathryn McMahan's NPI number?
Dr. Mary Kathryn McMahan's NPI number is 1205021193. It was assigned on September 13, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Mary Kathryn McMahan?
Dr. Mary Kathryn McMahan is an internist in Savannah, Georgia. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Mary Kathryn McMahan practice?
Dr. McMahan practices at 4700 Waters Avenue, Savannah, GA 31404. Dr. McMahan's primary practice is Memorial Health University Medical Center in Savannah, Georgia, part of HCA Healthcare. Dmand AI also links Dr. McMahan to 2 medical groups.
What is Dr. Mary Kathryn McMahan's office phone number?
The practice phone on file for Dr. McMahan is (912) 350-3691.
What is Dr. Mary Kathryn McMahan's medical license number?
Dr. McMahan holds Georgia license 062860.
Which hospitals is Dr. Mary Kathryn McMahan affiliated with?
Dr. McMahan practices at Memorial Health University Medical Center in Savannah, Georgia. Dr. McMahan is also affiliated with Appling Healthcare.
What medical group is Dr. Mary Kathryn McMahan part of?
Dr. McMahan is linked to Sound Physicians. Dmand AI links Dr. McMahan to 2 more medical groups.
Does Dr. Mary Kathryn McMahan accept Medicare?
Yes. CMS data shows Dr. McMahan billed Medicare for 583 services in 2024, and Dr. McMahan accepts Medicare assignment.
How many Medicare patients does Dr. Mary Kathryn McMahan see?
CMS counts 176 Medicare patients who saw Dr. McMahan in 2024, with an average age of 74.
What services does Dr. Mary Kathryn McMahan bill to Medicare?
In 2024, Dr. McMahan's most billed Medicare services were hospital inpatient care (99233), hospital inpatient care (99232) and hospital inpatient care (99239).
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What drugs does Dr. Mary Kathryn McMahan prescribe most?
In 2024 Medicare Part D data, Dr. McMahan's most prescribed drugs by claims were Atorvastatin Calcium, Pantoprazole Sodium and Oxycodone HCl.
Has Dr. Mary Kathryn McMahan received payments from drug or device companies?
CMS Open Payments shows $311 in general payments to Dr. McMahan from 8 companies from 2016 to 2025. The largest total came from Neurocrine BioSciences, Inc.
How long has Dr. Mary Kathryn McMahan been practicing?
Dr. McMahan graduated from medical school in 2006, 20 years ago.
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