Dr. Margaret Sidles Millar, MD
- Medicare services, 2018
- 54
- Part D claims, 2017
- 54
- Hospital affiliations
- 1
- Industry payments
- $111
- State license
- 1
- Practice address
- One St Joseph's Drive, Centerville, IA 52544
- Practice phone
- Call (641) 437-4111
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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Dr. Margaret Sidles Millar is an emergency medicine physician in Centerville, Iowa
Dr. Millar practices at MercyOne Centerville Medical Center in Centerville, Iowa, part of Trinity Health.
Dr. Millar's NPI, 1447239173, was assigned on January 11, 2006. Dr. Millar holds Illinois license 036.078142.
- NPI
- 1447239173NPI Registry (opens in a new tab)
- NPI enumeration date
- January 11, 2006
- NPI status
- Active
- Practice phone
- (641) 437-4111
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Margaret Sidles Millar practices at 2 locations in Centerville, Iowa
Dr. Millar's primary practice is MercyOne Centerville Medical Center, at One St Joseph's Drive, Centerville, IA 52544 in Appanoose County. The practice phone is (641) 437-4111. Dr. Millar also practices at MercyOne Centerville Medical Center, 1 Saint Joseph Dr, Centerville, IA 52544.
- MercyOne Centerville Medical CenterPrimaryOne St Joseph's Drive, Centerville, IA 52544 · Appanoose CountyPhone(641) 437-4111
- MercyOne Centerville Medical Center1 Saint Joseph Dr, Centerville, IA 52544 · Appanoose CountyPhone(641) 437-4111
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; and Dmand AI Practice Data
Dr. Margaret Sidles Millar is affiliated with 1 site of care
Dr. Millar's primary practice is MercyOne Centerville Medical Center in Centerville, Iowa, part of Trinity Health.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Margaret Sidles Millar's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Millar practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| MercyOne Centerville Medical Center | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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Dr. Margaret Sidles Millar is one of 436 emergency medicine physicians in Iowa
Emergency medicine is Dr. Millar's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Millar is licensed in Illinois.
Specialties and state licenses
- Emergency medicine, IllinoisPrimary
Emergency medicine physicians near Dr. Millar
Counts of emergency medicine physicians 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 Sidles Millar billed Medicare for 54 services in 2018
CMS data shows 54 Medicare services from Dr. Millar across 2 procedure codes in 2018. Medicare paid $3,631 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Millar's Medicare services by type, 2017 to 2018
- 2017
- 2018
- Office and hospital visits
- 2017: 922018: 5441%
Dr. Millar compared with the Iowa median for emergency medicine physicians, 2018
- Dr. Millar
- Iowa median
- Medicare services
- 54vs 23677% below
- Part D claims
- 54vs 6010% below
Medians across 447 emergency medicine physicians in Iowa with Dmand AI profiles that report each measure.
Dr. Millar's most billed Medicare procedure codes, 2018
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. Millar and other emergency medicine physicians in Iowa.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Margaret Sidles Millar's patients have a median age of 67
Across all payers, Dmand AI patient panel data puts Dr. Millar's median patient age at 67, with 93% women.
Dr. Millar'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
- Women93%
- Men7%
Source: Dmand AI Patient Panel Data
Dr. Margaret Sidles Millar wrote 54 Medicare Part D claims in 2017
In 2017, Dr. Millar wrote 54 Medicare Part D claims. They cover 3 drugs, with $254 in total drug cost. In 2016, CMS named 149 claims across 7 drugs.
Dr. Millar's most prescribed drugs by claims, 2017
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, 2016 to 2017
- 2016
- 2017
- Claims for drugs CMS names
- 2016: 1492017: 5464%
Drugs named by CMS: 3 in 2017, 7 in 2016.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Margaret Sidles Millar received $111 in industry payments from 2016 to 2021
CMS Open Payments shows 5 general payments to Dr. Millar from 3 drug and device companies from 2016 to 2021. Food and beverage make up the largest share, 100% of the total. Chiesi USA, Inc. paid the most, $61.
General payments to Dr. Millar by program year, 2016 to 2021
Companies that paid Dr. Millar the most, 2016 to 2021
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Margaret Sidles Millar'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 Affiliation DataDmand AI Practice 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 Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (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 Sidles Millar
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 Sidles Millar's NPI number?
Dr. Margaret Sidles Millar's NPI number is 1447239173. It was assigned on January 11, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Margaret Sidles Millar?
Dr. Margaret Sidles Millar is an emergency medicine physician in Centerville, Iowa. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Margaret Sidles Millar practice?
Dr. Millar practices at One St Joseph's Drive, Centerville, IA 52544. Dr. Millar also practices at 1 Saint Joseph Dr, Centerville, IA 52544. Dr. Millar's primary practice is MercyOne Centerville Medical Center in Centerville, Iowa, part of Trinity Health.
What is Dr. Margaret Sidles Millar's office phone number?
The practice phone on file for Dr. Millar is (641) 437-4111.
What is Dr. Margaret Sidles Millar's medical license number?
Dr. Millar holds Illinois license 036.078142.
Which hospitals is Dr. Margaret Sidles Millar affiliated with?
Dr. Millar practices at MercyOne Centerville Medical Center in Centerville, Iowa.
Does Dr. Margaret Sidles Millar accept Medicare?
Yes. CMS data shows Dr. Millar billed Medicare for 54 services in 2018.
What services does Dr. Margaret Sidles Millar bill to Medicare?
In 2018, Dr. Millar's most billed Medicare services were emergency department visit (99283) and emergency department visit (99284).
What drugs does Dr. Margaret Sidles Millar prescribe most?
In 2017 Medicare Part D data, Dr. Millar's most prescribed drugs by claims were Prednisone, Hydrocodone-Acetaminophen and Sulfamethoxazole-Trimethoprim.
Has Dr. Margaret Sidles Millar received payments from drug or device companies?
CMS Open Payments shows $111 in general payments to Dr. Millar from 3 companies from 2016 to 2021. The largest total came from Chiesi USA, Inc.
How long has Dr. Margaret Sidles Millar been practicing?
Dr. Millar's NPI was assigned in 2006.
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