Mary B. Ernst, FNP
- Medicare patients, 2024
- 116
- Part D claims, 2024
- 331
- Industry payments
- $32
- Affiliated sites
- 1
- Medical groups
- 2
- Practice address
- 670 Mason Ridge Center Dr, Saint Louis, MO 63141
- Practice phone
- Call (314) 996-7644
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Physician Groups LC
Saint Louis, Missouri
Find Mary Ernst'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.
Mary B. Ernst is a nurse practitioner in Saint Louis, Missouri
Mary Ernst practices at Physician Groups LC in Saint Louis, Missouri.
Mary Ernst's NPI, 1487694659, was assigned on June 7, 2006. Mary Ernst holds Missouri license 2014010124.
- NPI
- 1487694659NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9133014293
- NPI enumeration date
- June 7, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (314) 996-7644
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 54
- Medical school graduation
- 1998
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Mary B. Ernst practices at Physician Groups LC in Saint Louis, Missouri
Mary Ernst's primary practice is Physician Groups LC, at 670 Mason Ridge Center Dr, Saint Louis, MO 63141 in Saint Louis County. The practice phone is (314) 996-7644.
- Physician Groups LC670 Mason Ridge Center Dr, Saint Louis, MO 63141 · Saint Louis CountyPhone(314) 996-7644
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Mary B. Ernst is affiliated with 2 sites of care and 2 medical groups
Mary Ernst's primary practice is Physician Groups LC in Saint Louis, Missouri. The medical group on file is Mercy Hospital St. Louis. Dmand AI also links Mary Ernst to 1 more group practice or clinic and 1 medical group, each 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 Mary B. Ernst's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Mary Ernst practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Physician Groups LC | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Mary B. Ernst is one of 1,347 nurse practitioners in Missouri
Nurse practitioner is Mary Ernst's primary specialty in the NPI Registry, under taxonomy code 363L00000X. Mary Ernst is licensed in Missouri.
Specialties and state licenses
- Nurse practitioner, MissouriPrimary
Nurse practitioners near Mary Ernst
Counts of 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
Mary B. Ernst treated 116 Medicare patients in 2024, average age 74
CMS counts 116 Medicare patients who saw Mary Ernst in 2024. The largest group is 65 to 74, with 49 patients. 75% of them have high blood pressure, and 75% have high cholesterol. Their average risk score is 1.16, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Mary Ernst's median patient age at 50, with 61% women.
Mary Ernst's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Mary Ernst's Medicare patients by sex, 2024
- Women7363%
- Men4337%
Chronic conditions among Mary Ernst's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis57%
- Mood disorders29%
- Depression28%
- Ischemic heart disease28%
- Diabetes26%
- Anxiety25%
Share of Medicare patients with each condition. A patient can have several.
Mary Ernst's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 50
Patient panel by sex, all payers
- Women61%
- Men38%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Mary B. Ernst wrote 331 Medicare Part D claims in 2024
In 2024, Mary Ernst wrote 331 Medicare Part D claims for 218 patients. 92% of them were for generic drugs.
Mary Ernst's Part D claims by kind of drug, 2024
- Generic306 claims92%
- Brand-name and other25 claims8%
Drug classes CMS tracks in Mary Ernst's Part D claims, 2024
- Antibiotics48%160 of 331 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 Mary B. Ernst takes part in Medicare
Mary Ernst 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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Mary B. Ernst received $32 in industry payments in 2025
CMS Open Payments shows 2 general payments to Mary Ernst from 2 drug and device companies in 2025. Food and beverage make up the largest share, 100% of the total. Actelion Pharmaceuticals US, Inc. paid the most, $17.
Companies that paid Mary Ernst 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 Mary B. Ernst'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 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 Mary B. Ernst
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Mary B. Ernst's NPI number?
Mary B. Ernst's NPI number is 1487694659. It was assigned on June 7, 2006, and it is active in the NPI Registry.
What does Mary B. Ernst specialize in?
Mary B. Ernst is a nurse practitioner in Saint Louis, Missouri. The primary specialty in the NPI Registry is Nurse Practitioner (taxonomy code 363L00000X).
Where does Mary B. Ernst practice?
Mary Ernst practices at 670 Mason Ridge Center Dr, Saint Louis, MO 63141. Mary Ernst's primary practice is Physician Groups LC in Saint Louis, Missouri. Dmand AI also links Mary Ernst to 1 group practice or clinic and 1 medical group.
What is Mary B. Ernst's office phone number?
The practice phone on file for Mary Ernst is (314) 996-7644.
What is Mary B. Ernst's medical license number?
Mary Ernst holds Missouri license 2014010124.
What medical group is Mary B. Ernst part of?
Mary Ernst is linked to Mercy Hospital St. Louis. Dmand AI links Mary Ernst to 1 more medical group.
Does Mary B. Ernst accept Medicare?
Yes. CMS lists Mary Ernst as accepting Medicare assignment.
How many Medicare patients does Mary B. Ernst see?
CMS counts 116 Medicare patients who saw Mary Ernst in 2024, with an average age of 74.
Has Mary B. Ernst received payments from drug or device companies?
CMS Open Payments shows $32 in general payments to Mary Ernst from 2 companies from 2025 to 2025. The largest total came from Actelion Pharmaceuticals US, Inc.
How long has Mary B. Ernst been practicing?
Mary Ernst graduated from medical school in 1998, 28 years ago.
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