Nicole A. Johnston, PA
- Medicare patients, 2024
- 38
- Hospital affiliations
- 1
- Industry payments
- $101
- Medical group
- 1
- State licenses
- 2
- 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 Nicole Johnston'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.
Nicole A. Johnston is a physician assistant in Saint Louis, Missouri
Nicole Johnston practices at Mercy Hospital St. Louis in Saint Louis, Missouri, part of Mercy.
Nicole Johnston's NPI, 1538131883, was assigned on February 2, 2006. Nicole Johnston holds Minnesota license 10431.
- NPI
- 1538131883NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1355361072
- NPI enumeration date
- February 2, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (314) 251-6000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 47
- Medical school graduation
- 2005
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Nicole A. Johnston practices at Mercy Hospital St. Louis in Saint Louis, Missouri
Nicole Johnston'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
Nicole A. Johnston is affiliated with 2 sites of care and 1 medical group
Nicole Johnston's primary practice is Mercy Hospital St. Louis in Saint Louis, Missouri, part of Mercy. The medical group on file is Mercy Clinic Cardiovascular and Thoracic Surgery. Dmand AI also links Nicole Johnston to 1 more group practice or clinic, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Nicole A. Johnston's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Nicole Johnston practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Mercy Hospital St. Louis | 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 Mercy and 6.2K+ hospitals, with verified contacts in the same login.
Nicole A. Johnston is one of 1,484 physician assistants in Missouri
Physician assistant is Nicole Johnston's primary specialty in the NPI Registry, under taxonomy code 363A00000X. Dmand AI has Nicole Johnston's licenses on file in 2 states: Minnesota and Missouri.
Specialties and state licenses
- Physician assistant, MinnesotaPrimary
- Surgical physician assistant, Missouri
Physician assistants near Nicole Johnston
Counts of physician assistants 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
Nicole A. Johnston treated 38 Medicare patients in 2024, average age 75
CMS counts 38 Medicare patients who saw Nicole Johnston in 2024. The largest group is 65 to 74, with 15 patients. 75% of them have high blood pressure, and 75% have high cholesterol. Their average risk score is 1.91, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Nicole Johnston's median patient age at 67, with 43% women.
Nicole Johnston's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Nicole Johnston's Medicare patients by sex, 2024
- Women1950%
- Men1950%
Chronic conditions among Nicole Johnston's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Ischemic heart disease75%
- Arthritis68%
- Atrial fibrillation61%
- Heart failure61%
- Chronic kidney disease58%
- COPD47%
Share of Medicare patients with each condition. A patient can have several.
Nicole Johnston'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
- Women43%
- Men57%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
How Nicole A. Johnston takes part in Medicare
Nicole Johnston 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)
Nicole A. Johnston received $101 in industry payments in 2025
CMS Open Payments shows 4 general payments to Nicole Johnston from 3 drug and device companies in 2025. Food and beverage make up the largest share, 100% of the total. AtriCure, Inc. paid the most, $51.
Companies that paid Nicole Johnston 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 Nicole A. Johnston'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 DataMedicare Physician & Other Practitioners - 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 Nicole A. Johnston
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Nicole A. Johnston's NPI number?
Nicole A. Johnston's NPI number is 1538131883. It was assigned on February 2, 2006, and it is active in the NPI Registry.
What does Nicole A. Johnston specialize in?
Nicole A. Johnston is a physician assistant in Saint Louis, Missouri. The primary specialty in the NPI Registry is Physician Assistant (taxonomy code 363A00000X).
Where does Nicole A. Johnston practice?
Nicole Johnston practices at 615 New Ballas Road, Saint Louis, MO 63141. Nicole Johnston's primary practice is Mercy Hospital St. Louis in Saint Louis, Missouri, part of Mercy. Dmand AI also links Nicole Johnston to 1 group practice or clinic.
What is Nicole A. Johnston's office phone number?
The practice phone on file for Nicole Johnston is (314) 251-6000.
What is Nicole A. Johnston's medical license number?
Nicole Johnston holds Minnesota license 10431, one of the licenses on file in 2 states.
Which states has Nicole A. Johnston been licensed in?
Dmand AI has state licenses on file for Nicole Johnston in Minnesota and Missouri.
Which hospitals is Nicole A. Johnston affiliated with?
Nicole Johnston practices at Mercy Hospital St. Louis in Saint Louis, Missouri.
What medical group is Nicole A. Johnston part of?
Nicole Johnston is linked to Mercy Clinic Cardiovascular and Thoracic Surgery.
Does Nicole A. Johnston accept Medicare?
Yes. CMS lists Nicole Johnston as accepting Medicare assignment.
How many Medicare patients does Nicole A. Johnston see?
CMS counts 38 Medicare patients who saw Nicole Johnston in 2024, with an average age of 75.
Has Nicole A. Johnston received payments from drug or device companies?
CMS Open Payments shows $101 in general payments to Nicole Johnston from 3 companies from 2025 to 2025. The largest total came from AtriCure, Inc.
How long has Nicole A. Johnston been practicing?
Nicole Johnston graduated from medical school in 2005, 21 years ago.
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