Dr. Millicent Leigh Horn, MD
- Medicare services, 2024
- 53
- Medicare patients, 2024
- 79
- Part D claims, 2024
- 97
- MIPS score, 2024
- 84
- Affiliated sites
- 1
- Practice address
- 1 Barnes Jewish Hospital Plz, Saint Louis, MO 63110
- Practice phone
- Call (314) 747-3000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Barnes-Jewish Hospital
Saint Louis, Missouri
Find Dr. Horn'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. Millicent Leigh Horn is a general practice physician in Saint Louis, Missouri
Dr. Horn practices at Barnes-Jewish Hospital in Saint Louis, Missouri.
Dr. Horn's NPI, 1427673821, was assigned on June 11, 2020. Dr. Horn graduated from University of Kentucky College of Medicine in 2020. Dr. Horn holds Missouri license 2022032316.
- NPI
- 1427673821NPI Registry (opens in a new tab)
- NPI enumeration date
- June 11, 2020
- NPI status
- Active
- Practice phone
- (314) 747-3000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 32
- Medical school graduation
- 2020
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Millicent Leigh Horn practices at Barnes-Jewish Hospital in Saint Louis, Missouri
Dr. Horn's primary practice is Barnes-Jewish Hospital, at 1 Barnes Jewish Hospital Plz, Saint Louis, MO 63110 in Saint Louis City. The practice phone is (314) 747-3000.
- Barnes-Jewish Hospital1 Barnes Jewish Hospital Plz, Saint Louis, MO 63110 · Saint Louis CityPhone(314) 747-3000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Millicent Leigh Horn is affiliated with 2 sites of care and 1 medical group
Dr. Horn's primary practice is Barnes-Jewish Hospital in Saint Louis, Missouri. The medical group on file is WashU Medicine Psychiatry. Dmand AI also links Dr. Horn to 1 more group practice or clinic, named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Millicent Leigh Horn's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Horn practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Barnes-Jewish Hospital | Available with a free account |
| +1 more affiliated site | 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. Millicent Leigh Horn is one of 124 general practice physicians in Missouri
General practice is Dr. Horn's primary specialty in the NPI Registry, under taxonomy code 208D00000X. Dr. Horn is licensed in Missouri.
Specialties and state licenses
- General practice, MissouriPrimary
General practice physicians near Dr. Horn
Counts of general practice 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. Millicent Leigh Horn billed Medicare for 53 services in 2024
CMS data shows 53 Medicare services from Dr. Horn across 2 procedure codes in 2024, for 79 Medicare patients. Medicare paid $3,064 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Horn's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1232024: 5357%
Dr. Horn compared with the Missouri median for general practice physicians, 2024
- Dr. Horn
- Missouri median
- Medicare services
- 53vs 14062% below
- Medicare patients
- 79vs 9214% below
- Part D claims
- 15vs 10185% below
Medians across 122 general practice physicians in Missouri with Dmand AI profiles that report each measure.
Dr. Horn'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. Horn?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Horn and other general practice physicians in Missouri.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Millicent Leigh Horn treated 79 Medicare patients in 2024, average age 64
CMS counts 79 Medicare patients who saw Dr. Horn in 2024. The largest group is under 65, with 31 patients. 75% of them have high blood pressure, and 63% have high cholesterol. 61% are also on Medicaid. Their average risk score is 3.02, 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. Horn's median patient age at 51, with 50% women.
Dr. Horn's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Horn's Medicare patients by sex, 2024
- Women3342%
- Men4658%
Chronic conditions among Dr. Horn's Medicare patients, 2024
- High blood pressure75%
- High cholesterol63%
- Arthritis52%
- Mood disorders47%
- Depression43%
- Chronic kidney disease42%
- Diabetes34%
- Anxiety33%
Share of Medicare patients with each condition. A patient can have several.
Dr. Horn's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 51
Patient panel by sex, all payers
- Women50%
- Men50%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Millicent Leigh Horn wrote 97 Medicare Part D claims in 2024
In 2024, Dr. Horn wrote 97 Medicare Part D claims for 32 patients. 82% of them were for generic drugs. CMS names the drug for 15 of them, across 1 drug with 11 or more claims each, at $109 in total drug cost. In 2023, CMS named 414 claims across 16 drugs.
Dr. Horn's Part D claims by kind of drug, 2024
- Generic80 claims82%
- Brand-name17 claims18%
Dr. Horn'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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 4142024: 1596%
Drugs named by CMS: 1 in 2024, 16 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. Millicent Leigh Horn scored 84 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 84 out of 100 for Dr. Horn for performance year 2024, reported as part of a group.
Dr. Horn's MIPS scores, performance year 2024
- 84of 100Final score
- 71.6of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 76of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Source: 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. Millicent Leigh Horn graduated from University of Kentucky College of Medicine
Dr. Horn graduated from University of Kentucky College of Medicine in 2020.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Millicent Leigh Horn'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 Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand 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 | Clinician Public Reporting: Overall MIPS Performance (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. Millicent Leigh Horn
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. Millicent Leigh Horn's NPI number?
Dr. Millicent Leigh Horn's NPI number is 1427673821. It was assigned on June 11, 2020, and it is active in the NPI Registry.
What kind of doctor is Dr. Millicent Leigh Horn?
Dr. Millicent Leigh Horn is a general practice physician in Saint Louis, Missouri. The primary specialty in the NPI Registry is General Practice Physician (taxonomy code 208D00000X).
Where does Dr. Millicent Leigh Horn practice?
Dr. Horn practices at 1 Barnes Jewish Hospital Plz, Saint Louis, MO 63110. Dr. Horn's primary practice is Barnes-Jewish Hospital in Saint Louis, Missouri. Dmand AI also links Dr. Horn to 1 group practice or clinic.
What is Dr. Millicent Leigh Horn's office phone number?
The practice phone on file for Dr. Horn is (314) 747-3000.
What is Dr. Millicent Leigh Horn's medical license number?
Dr. Horn holds Missouri license 2022032316.
What medical group is Dr. Millicent Leigh Horn part of?
Dr. Horn is linked to WashU Medicine Psychiatry.
Does Dr. Millicent Leigh Horn accept Medicare?
Yes. CMS data shows Dr. Horn billed Medicare for 53 services in 2024.
What is Dr. Millicent Leigh Horn's MIPS score?
Dr. Horn's MIPS final score for performance year 2024 is 84 out of 100, reported as part of a group.
How many Medicare patients does Dr. Millicent Leigh Horn see?
CMS counts 79 Medicare patients who saw Dr. Horn in 2024, with an average age of 64.
What services does Dr. Millicent Leigh Horn bill to Medicare?
In 2024, Dr. Horn's most billed Medicare services were office visit, established patient (99213) and hospital inpatient care (99222).
Show 3 more questionsShow fewer questions
Where did Dr. Millicent Leigh Horn go to medical school?
Dr. Horn graduated from University of Kentucky College of Medicine in 2020.
What drugs does Dr. Millicent Leigh Horn prescribe most?
In 2024 Medicare Part D data, Dr. Horn's most prescribed drugs by claims were Atorvastatin Calcium.
How long has Dr. Millicent Leigh Horn been practicing?
Dr. Horn graduated from medical school in 2020, 6 years ago.
Selling to general practice practices?
See general practice physicians 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