Mariah L. Messmer
- Medicare patients, 2024
- 97
- Part D claims, 2024
- 1,149
- Hospital affiliations
- 2
- Industry payments
- $81
- Medical group
- 1
- Practice address
- 679 State Highway 145, French Lick, IN 47432
- Practice phone
- Call (812) 936-6400
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Deaconess Clinic Family Medicine - French Lick
Rural Health Clinic - Hospital-Owned · French Lick, Indiana
Find Mariah Messmer'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.
Mariah L. Messmer is a family nurse practitioner in French Lick, Indiana
Mariah Messmer practices at Deaconess Clinic Family Medicine - French Lick in French Lick, Indiana.
Mariah Messmer's NPI, 1477204055, was assigned on January 14, 2022. Mariah Messmer holds Indiana license 71012150A.
- NPI
- 1477204055NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9931594835
- NPI enumeration date
- January 14, 2022
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (812) 936-6400
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 31
- Medical school graduation
- 2021
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Mariah L. Messmer practices at 2 locations in French Lick, Indiana
Mariah Messmer's primary practice is Deaconess Clinic Family Medicine - French Lick, at 679 State Highway 145, French Lick, IN 47432. The practice phone is (812) 936-6400. Mariah Messmer also practices at French Lick Family Medicine, 675 S State Road 145, French Lick, IN 47432.
- Deaconess Clinic Family Medicine - French LickPrimary679 State Highway 145, French Lick, IN 47432Phone(812) 936-6400
- French Lick Family Medicine675 S State Road 145, French Lick, IN 47432 · Orange CountyPhone(812) 936-6400
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; and Dmand AI Practice Data
Mariah L. Messmer is affiliated with 3 sites of care and 1 medical group
Mariah Messmer's primary practice is Deaconess Clinic Family Medicine - French Lick in French Lick, Indiana. Mariah Messmer is also affiliated with Deaconess Memorial Medical Center. The medical group on file is Deaconess Memorial Medical Center. Dmand AI also links Mariah Messmer to 1 more hospital, named with a free account. Mariah Messmer's employer is on file too: a rural health clinic (rhc).
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Mariah L. Messmer's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Mariah Messmer practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Deaconess Clinic Family Medicine - French Lick | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Mariah L. Messmer is one of 4,830 family nurse practitioners in Indiana
Family is Mariah Messmer's primary specialty in the NPI Registry, under taxonomy code 363LF0000X. Mariah Messmer is licensed in Indiana.
Specialties and state licenses
- Family nurse practitioner, IndianaPrimary
Family nurse practitioners near Mariah Messmer
Counts of family nurse practitioners 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
Mariah L. Messmer treated 97 Medicare patients in 2024, average age 73
CMS counts 97 Medicare patients who saw Mariah Messmer in 2024. The largest group is 65 to 74, with 51 patients. 75% of them have high blood pressure, and 75% have high cholesterol. Their average risk score is 0.99, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Mariah Messmer's median patient age at 60, with 57% women.
Mariah Messmer's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Mariah Messmer's Medicare patients by sex, 2024
- Women5456%
- Men4344%
Chronic conditions among Mariah Messmer's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis51%
- Anxiety35%
- COPD26%
- Chronic kidney disease25%
- Diabetes24%
- Ischemic heart disease24%
Share of Medicare patients with each condition. A patient can have several.
Mariah Messmer's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 60
Patient panel by sex, all payers
- Women57%
- Men43%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Mariah L. Messmer wrote 1,149 Medicare Part D claims in 2024
In 2024, Mariah Messmer wrote 1,149 Medicare Part D claims for 256 patients. 91% of them were for generic drugs.
Mariah Messmer's Part D claims by kind of drug, 2024
- Generic1,044 claims91%
- Brand-name and other105 claims9%
Drug classes CMS tracks in Mariah Messmer's Part D claims, 2024
- Opioids2%18 of 1,149 claims
- Antibiotics10%120 of 1,149 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Mariah L. Messmer takes part in Medicare
Mariah Messmer 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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Mariah L. Messmer received $81 in industry payments in 2025
CMS Open Payments shows 5 general payments to Mariah Messmer from 5 drug and device companies in 2025. Food and beverage make up the largest share, 100% of the total. Novartis Pharmaceuticals Corporation paid the most, $17.
Companies that paid Mariah Messmer the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Mariah L. Messmer'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 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 (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 Mariah L. Messmer
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Mariah L. Messmer's NPI number?
Mariah L. Messmer's NPI number is 1477204055. It was assigned on January 14, 2022, and it is active in the NPI Registry.
What does Mariah L. Messmer specialize in?
Mariah L. Messmer is a family nurse practitioner in French Lick, Indiana. The primary specialty in the NPI Registry is Family Nurse Practitioner (taxonomy code 363LF0000X).
Where does Mariah L. Messmer practice?
Mariah Messmer practices at 679 State Highway 145, French Lick, IN 47432. Mariah Messmer also practices at 675 S State Road 145, French Lick, IN 47432. Mariah Messmer's primary practice is Deaconess Clinic Family Medicine - French Lick in French Lick, Indiana. Dmand AI also links Mariah Messmer to 1 hospital.
What is Mariah L. Messmer's office phone number?
The practice phone on file for Mariah Messmer is (812) 936-6400.
What is Mariah L. Messmer's medical license number?
Mariah Messmer holds Indiana license 71012150A.
Which hospitals is Mariah L. Messmer affiliated with?
Mariah Messmer is affiliated with Deaconess Memorial Medical Center. Dmand AI links Mariah Messmer to 1 more hospital.
What medical group is Mariah L. Messmer part of?
Mariah Messmer is linked to Deaconess Memorial Medical Center.
Does Mariah L. Messmer accept Medicare?
Yes. CMS lists Mariah Messmer as accepting Medicare assignment.
How many Medicare patients does Mariah L. Messmer see?
CMS counts 97 Medicare patients who saw Mariah Messmer in 2024, with an average age of 73.
Has Mariah L. Messmer received payments from drug or device companies?
CMS Open Payments shows $81 in general payments to Mariah Messmer from 5 companies from 2025 to 2025. The largest total came from Novartis Pharmaceuticals Corporation.
How long has Mariah L. Messmer been practicing?
Mariah Messmer graduated from medical school in 2021, 5 years ago.
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