Dr. Nicholas Joseph Trottier, MD, MPH
- Part D claims, 2024
- 408
- Hospital affiliations
- 1
- Industry payments
- $24
- State license
- 1
- Year NPI issued
- 2018
- Practice address
- 615 New Ballas Road, Saint Louis, MO 63141
- Practice phone
- Call (314) 251-6000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Trottier's professional email, personal email and mobile number
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Dr. Nicholas Joseph Trottier is an internist in Saint Louis, Missouri
Dr. Trottier practices at Mercy Hospital St. Louis in Saint Louis, Missouri, part of Mercy.
Dr. Trottier's NPI, 1558859199, was assigned on April 30, 2018. Dr. Trottier holds Missouri license 2019029014.
- NPI
- 1558859199NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3870953680
- NPI enumeration date
- April 30, 2018
- NPI status
- Active
- Practice phone
- (314) 251-6000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Nicholas Joseph Trottier practices at Mercy Hospital St. Louis in Saint Louis, Missouri
Dr. Trottier's primary practice is Mercy Hospital St. Louis, at 615 New Ballas Road, Saint Louis, MO 63141 in St. Louis County. The practice phone is (314) 251-6000.
- Mercy Hospital St. Louis615 New Ballas Road, Saint Louis, MO 63141 · St. Louis CountyPhone(314) 251-6000
Source: Dmand AI Affiliation Data
Dr. Nicholas Joseph Trottier is affiliated with 1 site of care
Dr. Trottier's primary practice is Mercy Hospital St. Louis in Saint Louis, Missouri, part of Mercy.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Nicholas Joseph Trottier's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Trottier practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Mercy Hospital St. Louis | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Nicholas Joseph Trottier is one of 2,114 internists in Missouri
Internal medicine is Dr. Trottier's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Trottier is licensed in Missouri.
Specialties and state licenses
- Internal medicine, MissouriPrimary
Internists near Dr. Trottier
Counts of internists 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. Nicholas Joseph Trottier's patients have a median age of 83
Across all payers, Dmand AI patient panel data puts Dr. Trottier's median patient age at 83, with 80% women.
Dr. Trottier's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 83
Patient panel by sex, all payers
- Women80%
- Men20%
Source: Dmand AI Patient Panel Data
Dr. Nicholas Joseph Trottier wrote 408 Medicare Part D claims in 2024
In 2024, Dr. Trottier wrote 408 Medicare Part D claims for 73 patients. 79% of them were for generic drugs. CMS names the drug for 121 of them, across 7 drugs with 11 or more claims each, at $4,935 in total drug cost.
Dr. Trottier's Part D claims by kind of drug, 2024
- Generic321 claims79%
- Brand-name76 claims19%
- Other11 claims3%
Dr. Trottier'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. Trottier's Part D claims, 2024
- Opioids5%19 of 408 claims
- Antibiotics7%29 of 408 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
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
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Dr. Nicholas Joseph Trottier received $24 in industry payments in 2024
CMS Open Payments shows 1 general payment to Dr. Trottier from 1 drug or device company in 2024. Food and beverage make up the largest share, 100% of the total. ZOLL Services LLC (A/K/A ZOLL LifeCor Corp) paid the most, $24.
Companies that paid Dr. Trottier the most, 2024 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Nicholas Joseph Trottier'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 DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| 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) |
| 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 Dr. Nicholas Joseph Trottier
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What is Dr. Nicholas Joseph Trottier's NPI number?
Dr. Nicholas Joseph Trottier's NPI number is 1558859199. It was assigned on April 30, 2018, and it is active in the NPI Registry.
What kind of doctor is Dr. Nicholas Joseph Trottier?
Dr. Nicholas Joseph Trottier is an internist in Saint Louis, Missouri. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Nicholas Joseph Trottier practice?
Dr. Trottier practices at 615 New Ballas Road, Saint Louis, MO 63141. Dr. Trottier's primary practice is Mercy Hospital St. Louis in Saint Louis, Missouri, part of Mercy.
What is Dr. Nicholas Joseph Trottier's office phone number?
The practice phone on file for Dr. Trottier is (314) 251-6000.
What is Dr. Nicholas Joseph Trottier's medical license number?
Dr. Trottier holds Missouri license 2019029014.
Which hospitals is Dr. Nicholas Joseph Trottier affiliated with?
Dr. Trottier practices at Mercy Hospital St. Louis in Saint Louis, Missouri.
What drugs does Dr. Nicholas Joseph Trottier prescribe most?
In 2024 Medicare Part D data, Dr. Trottier's most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Losartan-Hydrochlorothiazide.
Has Dr. Nicholas Joseph Trottier received payments from drug or device companies?
CMS Open Payments shows $24 in general payments to Dr. Trottier from 1 company from 2024 to 2024. The largest total came from ZOLL Services LLC (A/K/A ZOLL LifeCor Corp).
How long has Dr. Nicholas Joseph Trottier been practicing?
Dr. Trottier's NPI was assigned in 2018.
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