Marissa Leigh Smith, FNP
- Medicare patients, 2024
- 291
- Part D claims, 2024
- 148
- MIPS score, 2024
- 100
- Hospital affiliations
- 3
- Industry payments
- $15
- Practice address
- 1 St Elizabeth Blvd, O'Fallon, IL 62269
- Practice phone
- Call (217) 492-9651
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
HSHS St. Elizabeth's Hospital
O'Fallon, Illinois
Find Marissa Smith'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.
Marissa Leigh Smith is a family nurse practitioner in O'Fallon, Illinois
Marissa Smith practices at HSHS St. Elizabeth's Hospital in O'Fallon, Illinois.
Marissa Smith's NPI, 1720480015, was assigned on September 18, 2014. Marissa Smith holds Missouri license 2021009802.
- NPI
- 1720480015NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9638491590
- NPI enumeration date
- September 18, 2014
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (217) 492-9651
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 38
- Medical school graduation
- 2014
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Marissa Leigh Smith practices at HSHS St. Elizabeth's Hospital in O'Fallon, Illinois
Marissa Smith's primary practice is HSHS St. Elizabeth's Hospital, at 1 St Elizabeth Blvd, O'Fallon, IL 62269 in Saint Clair County. The practice phone is (217) 492-9651.
- HSHS St. Elizabeth's Hospital1 St Elizabeth Blvd, O'Fallon, IL 62269 · Saint Clair CountyPhone(217) 492-9651
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Marissa Leigh Smith is affiliated with 4 sites of care and 1 medical group
Marissa Smith's primary practice is HSHS St. Elizabeth's Hospital in O'Fallon, Illinois. Marissa Smith is also affiliated with HSHS St. Elizabeth's Hospital. The medical group on file is Vituity (formerly CEP America). Dmand AI also links Marissa Smith to 2 more hospitals, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Marissa Leigh Smith's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Marissa Smith practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| HSHS St. Elizabeth's Hospital | Available with a free account |
| +3 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Marissa Leigh Smith is one of 7,275 family nurse practitioners in Illinois
Family is Marissa Smith's primary specialty in the NPI Registry, under taxonomy code 363LF0000X. Marissa Smith is licensed in Missouri.
Specialties and state licenses
- Family nurse practitioner, MissouriPrimary
Family nurse practitioners near Marissa Smith
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
Marissa Leigh Smith treated 291 Medicare patients in 2024, average age 76
CMS counts 291 Medicare patients who saw Marissa Smith in 2024. The largest group is 65 to 74, with 109 patients. 75% of them have arthritis, and 75% have high blood pressure. 17% are also on Medicaid. Their average risk score is 2.19, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Marissa Smith's median patient age at 67, with 55% women.
Marissa Smith's Medicare patients by age, 2024
Marissa Smith's Medicare patients by sex, 2024
- Women15754%
- Men13446%
Chronic conditions among Marissa Smith's Medicare patients, 2024
- Arthritis75%
- High blood pressure75%
- High cholesterol75%
- Ischemic heart disease53%
- Chronic kidney disease47%
- Heart failure45%
- Diabetes41%
- Anxiety38%
Share of Medicare patients with each condition. A patient can have several.
Marissa Smith'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
- Women55%
- Men45%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Marissa Leigh Smith wrote 148 Medicare Part D claims in 2024
In 2024, Marissa Smith wrote 148 Medicare Part D claims for 67 patients. 97% of them were for generic drugs.
Marissa Smith's Part D claims by kind of drug, 2024
- Generic144 claims97%
- Brand-name and other4 claims3%
Drug classes CMS tracks in Marissa Smith's Part D claims, 2024
- Antibiotics25%37 of 148 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
Marissa Leigh Smith scored 100 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 100 out of 100 for Marissa Smith for performance year 2024, reported as part of a group. Marissa Smith accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Marissa Smith's MIPS scores, performance year 2024
- 100of 100Final score
- 96.6of 100Quality
- 40of 100Improvement Activities
- 82of 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
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Marissa Leigh Smith received $15 in industry payments in 2025
CMS Open Payments shows 1 general payment to Marissa Smith from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. AtriCure, Inc. paid the most, $15.
Companies that paid Marissa Smith 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 Marissa Leigh Smith'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 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)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 Marissa Leigh Smith
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Marissa Leigh Smith's NPI number?
Marissa Leigh Smith's NPI number is 1720480015. It was assigned on September 18, 2014, and it is active in the NPI Registry.
What does Marissa Leigh Smith specialize in?
Marissa Leigh Smith is a family nurse practitioner in O'Fallon, Illinois. The primary specialty in the NPI Registry is Family Nurse Practitioner (taxonomy code 363LF0000X).
Where does Marissa Leigh Smith practice?
Marissa Smith practices at 1 St Elizabeth Blvd, O'Fallon, IL 62269. Marissa Smith's primary practice is HSHS St. Elizabeth's Hospital in O'Fallon, Illinois. Dmand AI also links Marissa Smith to 2 hospitals.
What is Marissa Leigh Smith's office phone number?
The practice phone on file for Marissa Smith is (217) 492-9651.
What is Marissa Leigh Smith's medical license number?
Marissa Smith holds Missouri license 2021009802.
Which hospitals is Marissa Leigh Smith affiliated with?
Marissa Smith is affiliated with HSHS St. Elizabeth's Hospital. Dmand AI links Marissa Smith to 2 more hospitals.
What medical group is Marissa Leigh Smith part of?
Marissa Smith is linked to Vituity (formerly CEP America).
Does Marissa Leigh Smith accept Medicare?
Yes. CMS lists Marissa Smith as accepting Medicare assignment.
What is Marissa Leigh Smith's MIPS score?
Marissa Smith's MIPS final score for performance year 2024 is 100 out of 100, reported as part of a group.
How many Medicare patients does Marissa Leigh Smith see?
CMS counts 291 Medicare patients who saw Marissa Smith in 2024, with an average age of 76.
Has Marissa Leigh Smith received payments from drug or device companies?
CMS Open Payments shows $15 in general payments to Marissa Smith from 1 company from 2025 to 2025. The largest total came from AtriCure, Inc.
How long has Marissa Leigh Smith been practicing?
Marissa Smith graduated from medical school in 2014, 12 years ago.
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