Dr. Margaret MacMillan, DO
- Medicare services, 2024
- 1,213
- Medicare patients, 2024
- 464
- Part D claims, 2024
- 394
- MIPS score, 2024
- 83
- Hospital affiliations
- 3
- Practice address
- 1100 Belk Blvd, Oxford, MS 38655
- Practice phone
- Call (662) 232-8100
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. MacMillan's professional email, personal email and mobile number
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Dr. Margaret MacMillan is an internist in Oxford, Mississippi
Dr. MacMillan practices at Baptist Memorial Hospital-North Mississippi in Oxford, Mississippi, part of Baptist Memorial Health Care.
Dr. MacMillan's NPI, 1265682462, was assigned on September 24, 2008. Dr. MacMillan holds Florida license OS 10694.
- NPI
- 1265682462NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7113112202
- NPI enumeration date
- September 24, 2008
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (662) 232-8100
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 45
- Medical school graduation
- 2007
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Margaret MacMillan practices at Baptist Memorial Hospital-North Mississippi in Oxford, Mississippi
Dr. MacMillan's primary practice is Baptist Memorial Hospital-North Mississippi, at 1100 Belk Blvd, Oxford, MS 38655 in Lafayette County. The practice phone is (662) 232-8100.
- Baptist Memorial Hospital-North Mississippi1100 Belk Blvd, Oxford, MS 38655 · Lafayette CountyPhone(662) 232-8100
Source: Dmand AI Affiliation Data
Dr. Margaret MacMillan is affiliated with 3 sites of care and 1 medical group
Dr. MacMillan's primary practice is Baptist Memorial Hospital-North Mississippi in Oxford, Mississippi, part of Baptist Memorial Health Care. Dr. MacMillan is also affiliated with Baptist Memorial Hospital-Union County. The medical group on file is SCP Health. Dmand AI also links Dr. MacMillan to 1 more hospital, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Margaret MacMillan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. MacMillan practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Baptist Memorial Hospital-North Mississippi | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dmand AI maps EHR vendors, IT decision makers and buying committees across Baptist Memorial Health Care and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Margaret MacMillan is one of 785 internists in Mississippi
Internal medicine is Dr. MacMillan's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. MacMillan is licensed in Florida.
Specialties and state licenses
- Internal medicine, FloridaPrimary
Internists near Dr. MacMillan
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. Margaret MacMillan billed Medicare for 1,213 services in 2024
CMS data shows 1,213 Medicare services from Dr. MacMillan across 5 procedure codes in 2024, for 464 Medicare patients. Medicare paid $109,280 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. MacMillan's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 8672024: 1,21340%
Dr. MacMillan compared with the Mississippi median for internists, 2024
- Dr. MacMillan
- Mississippi median
- Medicare services
- 1,213vs 98723% above
- Medicare patients
- 464vs 31448% above
- Part D claims
- 129vs 28154% below
Medians across 747 internists in Mississippi with Dmand AI profiles that report each measure.
Dr. MacMillan'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. Margaret MacMillan treated 464 Medicare patients in 2024, average age 76
CMS counts 464 Medicare patients who saw Dr. MacMillan in 2024. The largest group is 75 to 84, with 164 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 27% are also on Medicaid. Their average risk score is 2.42, 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. MacMillan's median patient age at 76, with 48% women.
Dr. MacMillan's Medicare patients by age, 2024
Dr. MacMillan's Medicare patients by sex, 2024
- Women23952%
- Men22548%
Chronic conditions among Dr. MacMillan's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis66%
- Ischemic heart disease60%
- Diabetes54%
- Chronic kidney disease53%
- Heart failure53%
- Atrial fibrillation47%
Share of Medicare patients with each condition. A patient can have several.
Dr. MacMillan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 76
Patient panel by sex, all payers
- Women48%
- Men52%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Margaret MacMillan wrote 394 Medicare Part D claims in 2024
In 2024, Dr. MacMillan wrote 394 Medicare Part D claims for 167 patients. 85% of them were for generic drugs. CMS names the drug for 129 of them, across 8 drugs with 11 or more claims each, at $6,651 in total drug cost. In 2022, CMS named 52 claims across 4 drugs.
Dr. MacMillan's Part D claims by kind of drug, 2024
- Generic336 claims85%
- Brand-name58 claims15%
Dr. MacMillan'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. MacMillan's Part D claims, 2024
- Antibiotics23%92 of 394 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, 2022 to 2024
- 2022
- 2024
- Claims for drugs CMS names
- 2022: 522024: 129148%
Drugs named by CMS: 8 in 2024, 4 in 2022.
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 MacMillan scored 83 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 83 out of 100 for Dr. MacMillan for performance year 2024, reported as part of a group. Dr. MacMillan accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. MacMillan's MIPS scores, performance year 2024
- 83of 100Final score
- 69.4of 100Quality
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Margaret MacMillan received $742 in industry payments from 2016 to 2025
CMS Open Payments shows 44 general payments to Dr. MacMillan from 11 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Janssen Pharmaceuticals, Inc paid the most, $209.
General payments to Dr. MacMillan by program year, 2016 to 2025
Companies that paid Dr. MacMillan 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. Margaret MacMillan'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) |
| 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. Margaret MacMillan
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 MacMillan's NPI number?
Dr. Margaret MacMillan's NPI number is 1265682462. It was assigned on September 24, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. Margaret MacMillan?
Dr. Margaret MacMillan is an internist in Oxford, Mississippi. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Margaret MacMillan practice?
Dr. MacMillan practices at 1100 Belk Blvd, Oxford, MS 38655. Dr. MacMillan's primary practice is Baptist Memorial Hospital-North Mississippi in Oxford, Mississippi, part of Baptist Memorial Health Care. Dmand AI also links Dr. MacMillan to 1 hospital.
What is Dr. Margaret MacMillan's office phone number?
The practice phone on file for Dr. MacMillan is (662) 232-8100.
What is Dr. Margaret MacMillan's medical license number?
Dr. MacMillan holds Florida license OS 10694.
Which hospitals is Dr. Margaret MacMillan affiliated with?
Dr. MacMillan practices at Baptist Memorial Hospital-North Mississippi in Oxford, Mississippi. Dr. MacMillan is also affiliated with Baptist Memorial Hospital-Union County. Dmand AI links Dr. MacMillan to 1 more hospital.
What medical group is Dr. Margaret MacMillan part of?
Dr. MacMillan is linked to SCP Health.
Does Dr. Margaret MacMillan accept Medicare?
Yes. CMS data shows Dr. MacMillan billed Medicare for 1,213 services in 2024, and Dr. MacMillan accepts Medicare assignment.
What is Dr. Margaret MacMillan's MIPS score?
Dr. MacMillan's MIPS final score for performance year 2024 is 83 out of 100, reported as part of a group.
How many Medicare patients does Dr. Margaret MacMillan see?
CMS counts 464 Medicare patients who saw Dr. MacMillan in 2024, with an average age of 76.
Show 4 more questionsShow fewer questions
What services does Dr. Margaret MacMillan bill to Medicare?
In 2024, Dr. MacMillan's most billed Medicare services were hospital inpatient care (99233), hospital inpatient care (99239) and hospital inpatient care (99232).
What drugs does Dr. Margaret MacMillan prescribe most?
In 2024 Medicare Part D data, Dr. MacMillan's most prescribed drugs by claims were Cefdinir, Furosemide and Amoxicillin-Clavulanate Potass.
Has Dr. Margaret MacMillan received payments from drug or device companies?
CMS Open Payments shows $742 in general payments to Dr. MacMillan from 11 companies from 2016 to 2025. The largest total came from Janssen Pharmaceuticals, Inc.
How long has Dr. Margaret MacMillan been practicing?
Dr. MacMillan graduated from medical school in 2007, 19 years ago.
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