Dr. Robert Riordan Mac Donald III, MD
- Medicare services, 2024
- 2,956
- Medicare patients, 2024
- 488
- Part D claims, 2024
- 1,110
- MIPS score, 2024
- 92
- Hospital affiliations
- 5
- Practice address
- 4790 Executive Centre Pkwy, Saint Peters, MO 63376-1606
- Practice phone
- Call (636) 441-3100
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Midwest ENT Centre
Surgical practice · Saint Peters, Missouri
Find Dr. Mac Donald'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. Robert Riordan Mac Donald III is an otolaryngologist in Saint Peters, Missouri
Dr. Mac Donald practices at Midwest ENT Centre in Saint Peters, Missouri.
Dr. Mac Donald's NPI, 1861417156, was assigned on July 13, 2006. Dr. Mac Donald graduated from Washington University School of Medicine in 1989. Dr. Mac Donald holds Missouri license MO103596.
- NPI
- 1861417156NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0941374235
- NPI enumeration date
- July 13, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (636) 441-3100
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 63
- Medical school graduation
- 1989
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Robert Riordan Mac Donald III practices at Midwest ENT Centre in Saint Peters, Missouri
Dr. Mac Donald's primary practice is Midwest ENT Centre, at 4790 Executive Centre Pkwy, Saint Peters, MO 63376-1606. The practice phone is (636) 441-3100.
- Midwest ENT Centre4790 Executive Centre Pkwy, Saint Peters, MO 63376-1606Phone(636) 441-3100
Source: Dmand AI Affiliation Data
Dr. Robert Riordan Mac Donald III is affiliated with 6 sites of care and 1 medical group
Dr. Mac Donald's primary practice is Midwest ENT Centre in Saint Peters, Missouri. Dr. Mac Donald is also affiliated with Barnes-Jewish St. Peters Hospital. The medical group on file is Midwest ENT Centre. Dmand AI also links Dr. Mac Donald to 4 more hospitals, each named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Robert Riordan Mac Donald III's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Mac Donald practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Midwest ENT Centre | Available with a free account |
| +5 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across each health system and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Robert Riordan Mac Donald III is one of 195 otolaryngologists in Missouri
Otolaryngology is Dr. Mac Donald's primary specialty in the NPI Registry, under taxonomy code 207Y00000X. Dr. Mac Donald is licensed in Missouri.
Specialties and state licenses
- Otolaryngology, MissouriPrimary
Otolaryngologists near Dr. Mac Donald
Counts of otolaryngologists 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. Robert Riordan Mac Donald III billed Medicare for 2,956 services in 2024
CMS data shows 2,956 Medicare services from Dr. Mac Donald across 16 procedure codes in 2024, for 488 Medicare patients. Medicare paid $87,795 for them. Every service was in an office.
Dr. Mac Donald's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 2,4812024: 1,67233%
- Office and hospital visits
- 2023: 7242024: 7646%
- Other services
- 2023: 182024: 2851483%
- Surgery
- 2023: 1932024: 14027%
- Drugs given in the office
- 2023: 702024: 5620%
- Imaging
- 2023: 592024: 3934%
Dr. Mac Donald compared with the Missouri median for otolaryngologists, 2024
- Dr. Mac Donald
- Missouri median
- Medicare services
- 2,956vs 5745.1 times
- Medicare patients
- 488vs 26386% above
- Part D claims
- 958vs 1436.7 times
Medians across 192 otolaryngologists in Missouri with Dmand AI profiles that report each measure.
Dr. Mac Donald'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. Mac Donald?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Mac Donald and other otolaryngologists in Missouri.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Robert Riordan Mac Donald III treated 488 Medicare patients in 2024, average age 76
CMS counts 488 Medicare patients who saw Dr. Mac Donald in 2024. The largest group is 65 to 74, with 214 patients. 75% of them have high cholesterol, and 72% have high blood pressure. 3% are also on Medicaid. Their average risk score is 1.26, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Mac Donald's median patient age at 62, with 55% women.
Dr. Mac Donald's Medicare patients by age, 2024
Dr. Mac Donald's Medicare patients by sex, 2024
- Women27957%
- Men20943%
Chronic conditions among Dr. Mac Donald's Medicare patients, 2024
- High cholesterol75%
- High blood pressure72%
- Arthritis50%
- Chronic kidney disease27%
- Ischemic heart disease27%
- Mood disorders27%
- Anxiety25%
- Depression25%
Share of Medicare patients with each condition. A patient can have several.
Dr. Mac Donald'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
- Women55%
- Men44%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Robert Riordan Mac Donald III wrote 1,110 Medicare Part D claims in 2024
In 2024, Dr. Mac Donald wrote 1,110 Medicare Part D claims for 456 patients. 95% of them were for generic drugs. CMS names the drug for 958 of them, across 22 drugs with 11 or more claims each, at $14,701 in total drug cost. In 2023, CMS named 834 claims across 18 drugs.
Dr. Mac Donald's Part D claims by kind of drug, 2024
- Generic1,058 claims95%
- Brand-name52 claims5%
Dr. Mac Donald'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. Mac Donald's Part D claims, 2024
- Opioids4%39 of 1,110 claims
- Antibiotics12%138 of 1,110 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: 8342024: 95815%
Drugs named by CMS: 22 in 2024, 18 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. Robert Riordan Mac Donald III scored 92 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 92 out of 100 for Dr. Mac Donald for performance year 2024, reported as part of a group. Dr. Mac Donald accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Mac Donald's MIPS scores, performance year 2024
- 92of 100Final score
- 100of 100Quality
- 40of 100Improvement Activities
- 75of 100Cost
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
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Robert Riordan Mac Donald III received $5,334 in industry payments from 2016 to 2025
CMS Open Payments shows 132 general payments to Dr. Mac Donald from 30 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 63% of the total. Aerin Medical Inc. paid the most, $1,591.
General payments to Dr. Mac Donald by program year, 2016 to 2025
General payments to Dr. Mac Donald by kind, 2016 to 2025
- Food and beverage$3,36763%
- Travel and lodging$1,81434%
- Speaker and faculty fees$1343%
- Education$190%
Companies that paid Dr. Mac Donald 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. Robert Riordan Mac Donald III graduated from Washington University School of Medicine
Dr. Mac Donald graduated from Washington University School of Medicine in 1989.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Robert Riordan Mac Donald III'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 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) |
| 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. Robert Riordan Mac Donald III
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. Robert Riordan Mac Donald III's NPI number?
Dr. Robert Riordan Mac Donald III's NPI number is 1861417156. It was assigned on July 13, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Robert Riordan Mac Donald III?
Dr. Robert Riordan Mac Donald III is an otolaryngologist in Saint Peters, Missouri. The primary specialty in the NPI Registry is Otolaryngology Physician (taxonomy code 207Y00000X).
Where does Dr. Robert Riordan Mac Donald III practice?
Dr. Mac Donald practices at 4790 Executive Centre Pkwy, Saint Peters, MO 63376-1606. Dr. Mac Donald's primary practice is Midwest ENT Centre in Saint Peters, Missouri. Dmand AI also links Dr. Mac Donald to 4 hospitals.
What is Dr. Robert Riordan Mac Donald III's office phone number?
The practice phone on file for Dr. Mac Donald is (636) 441-3100.
What is Dr. Robert Riordan Mac Donald III's medical license number?
Dr. Mac Donald holds Missouri license MO103596.
Which hospitals is Dr. Robert Riordan Mac Donald III affiliated with?
Dr. Mac Donald is affiliated with Barnes-Jewish St. Peters Hospital. Dmand AI links Dr. Mac Donald to 4 more hospitals.
What medical group is Dr. Robert Riordan Mac Donald III part of?
Dr. Mac Donald is linked to Midwest ENT Centre.
Does Dr. Robert Riordan Mac Donald III accept Medicare?
Yes. CMS data shows Dr. Mac Donald billed Medicare for 2,956 services in 2024, and Dr. Mac Donald accepts Medicare assignment.
What is Dr. Robert Riordan Mac Donald III's MIPS score?
Dr. Mac Donald's MIPS final score for performance year 2024 is 92 out of 100, reported as part of a group.
How many Medicare patients does Dr. Robert Riordan Mac Donald III see?
CMS counts 488 Medicare patients who saw Dr. Mac Donald in 2024, with an average age of 76.
Show 5 more questionsShow fewer questions
What services does Dr. Robert Riordan Mac Donald III bill to Medicare?
In 2024, Dr. Mac Donald's most billed Medicare services were allergy test or treatment (95165), office visit, established patient (99213) and allergy test or treatment (95117).
Where did Dr. Robert Riordan Mac Donald III go to medical school?
Dr. Mac Donald graduated from Washington University School of Medicine in 1989.
What drugs does Dr. Robert Riordan Mac Donald III prescribe most?
In 2024 Medicare Part D data, Dr. Mac Donald's most prescribed drugs by claims were Fluticasone Propionate, Montelukast Sodium and Prednisone.
Has Dr. Robert Riordan Mac Donald III received payments from drug or device companies?
CMS Open Payments shows $5,334 in general payments to Dr. Mac Donald from 30 companies from 2016 to 2025. The largest total came from Aerin Medical Inc.
How long has Dr. Robert Riordan Mac Donald III been practicing?
Dr. Mac Donald graduated from medical school in 1989, 37 years ago.
Selling to otolaryngology practices?
See otolaryngologists in Missouri by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card