$2,320 in research paymentsBipolar and Related DisordersBipolar DisorderCarbamazepine
Dr. Mark C. Johnson, MD
NPI1497796957
- Part D claims, 2019
- 13
- Clinical trials
- 1
- MIPS score, 2024
- 84
- Hospital affiliations
- 1
- Industry payments
- $116
- Practice address
- 1 Barnes Jewish Hospital Plz, Saint Louis, MO 63110
- Practice phone
- Call (314) 454-8178
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Barnes-Jewish Hospital
Saint Louis, Missouri
Find Dr. Johnson'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.
Dr. Mark C. Johnson is a pediatric cardiology physician in Saint Louis, Missouri
Dr. Johnson practices at Barnes-Jewish Hospital in Saint Louis, Missouri.
Dr. Johnson's NPI, 1497796957, was assigned on June 8, 2006. Dr. Johnson graduated from Johns Hopkins University School of Medicine in 1982. Dr. Johnson holds Missouri license 102902.
NPI and contact details
- NPI
- 1497796957NPI Registry (opens in a new tab)
- NPI enumeration date
- June 8, 2006
- NPI status
- Active
- Practice phone
- (314) 454-8178
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 70
- Medical school graduation
- 1982
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Mark C. Johnson practices at Barnes-Jewish Hospital in Saint Louis, Missouri
Dr. Johnson's primary practice is Barnes-Jewish Hospital, at 1 Barnes Jewish Hospital Plz, Saint Louis, MO 63110 in Saint Louis City. The practice phone is (314) 454-8178.
- Barnes-Jewish Hospital1 Barnes Jewish Hospital Plz, Saint Louis, MO 63110 · Saint Louis CityPhone(314) 454-8178
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Mark C. Johnson is affiliated with 2 sites of care and 1 medical group
Dr. Johnson's primary practice is Barnes-Jewish Hospital in Saint Louis, Missouri. Dr. Johnson is also affiliated with St. Louis Children's Hospital. The medical group on file is WashU Medicine Physicians.
Barnes-Jewish HospitalPrimary
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 Dr. Mark C. Johnson's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Johnson practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Barnes-Jewish Hospital | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
See the EHR and IT leaders at every site where Dr. Johnson practices
Dmand AI maps EHR vendors, IT decision makers and buying committees across each health system and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Mark C. Johnson is one of 80 pediatric cardiology physicians in Missouri
Pediatric cardiology is Dr. Johnson's primary specialty in the NPI Registry, under taxonomy code 2080P0202X. Dr. Johnson is licensed in Missouri.
Specialties and state licenses
- Pediatric cardiology, MissouriPrimary
Pediatric cardiology physicians near Dr. Johnson
Counts of pediatric cardiology physicians 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. Mark C. Johnson's patients have a median age of 47
Across all payers, Dmand AI patient panel data puts Dr. Johnson's median patient age at 47, with 58% women.
Dr. Johnson's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 47
Patient panel by sex, all payers
- Women58%
- Men42%
Source: Dmand AI Patient Panel Data
Dr. Mark C. Johnson wrote 13 Medicare Part D claims in 2019
In 2019, Dr. Johnson wrote 13 Medicare Part D claims. Every claim was for a generic drug. They cover 1 drug, with $16 in total drug cost. In 2017, CMS named 16 claims across 1 drug.
Part D claims, 201913
Drugs named by CMS1
Total drug cost$16
Dr. Johnson's most prescribed drugs by claims, 2019
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2017 to 2019
- 2017
- 2019
- Claims for drugs CMS names
- 2017: 162019: 1319%
Drugs named by CMS: 1 in 2019, 1 in 2017.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
Dr. Mark C. Johnson scored 84 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 84 out of 100 for Dr. Johnson for performance year 2024, reported as part of a group.
Dr. Johnson's MIPS scores, performance year 2024
- 84of 100Final score
- 71.6of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 76of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Source: Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
For MedTech and pharma teams
Find pediatric cardiology physicians like Dr. Johnson by procedure volume and prescribing
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Mark C. Johnson has worked on 1 clinical trial
Dmand AI links Dr. Johnson to 1 clinical trial. Conditions studied include Bipolar and Related Disorders and Bipolar Disorder. Open Payments lists research payments to Dr. Johnson that name 1 trial.
Conditions in Dr. Johnson's trials
- Bipolar and Related Disorders
- Bipolar Disorder
Investigators on the most trials with Dr. Johnson
- Robert L. Findling, MD1 shared trial
- Lawrence David Ginsberg, MD1 shared trial
- Mohd Azfar Malik, MD1 shared trial
Recent clinical trials with Dr. Johnson
Sources: Open Payments (CMS), 2025 data, released July 7, 2026; ClinicalTrials.gov (National Library of Medicine); and Dmand AI Research Linkage
Dr. Mark C. Johnson received $116 in industry payments in 2019
CMS Open Payments shows 2 general payments to Dr. Johnson from 2 drug and device companies in 2019. Food and beverage make up the largest share, 100% of the total. Bausch Health Americas, Inc. paid the most, $76. It also lists 10 research payments totaling $2,320 from 2016 to 2019, naming 1 clinical trial.
Companies that paid Dr. Johnson the most, 2019 to 2019
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Mark C. Johnson graduated from Johns Hopkins University School of Medicine
Dr. Johnson graduated from Johns Hopkins University School of Medicine in 1982.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Mark C. Johnson'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 Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Clinical trials and co-investigators | ClinicalTrials.gov (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| 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. Mark C. Johnson
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Mark C. Johnson's NPI number?
Dr. Mark C. Johnson's NPI number is 1497796957. It was assigned on June 8, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark C. Johnson?
Dr. Mark C. Johnson is a pediatric cardiology physician in Saint Louis, Missouri. The primary specialty in the NPI Registry is Pediatric Cardiology Physician (taxonomy code 2080P0202X).
Where does Dr. Mark C. Johnson practice?
Dr. Johnson practices at 1 Barnes Jewish Hospital Plz, Saint Louis, MO 63110. Dr. Johnson's primary practice is Barnes-Jewish Hospital in Saint Louis, Missouri.
What is Dr. Mark C. Johnson's office phone number?
The practice phone on file for Dr. Johnson is (314) 454-8178.
What is Dr. Mark C. Johnson's medical license number?
Dr. Johnson holds Missouri license 102902.
Which hospitals is Dr. Mark C. Johnson affiliated with?
Dr. Johnson is affiliated with St. Louis Children's Hospital.
What medical group is Dr. Mark C. Johnson part of?
Dr. Johnson is linked to WashU Medicine Physicians.
What is Dr. Mark C. Johnson's MIPS score?
Dr. Johnson's MIPS final score for performance year 2024 is 84 out of 100, reported as part of a group.
Where did Dr. Mark C. Johnson go to medical school?
Dr. Johnson graduated from Johns Hopkins University School of Medicine in 1982.
What drugs does Dr. Mark C. Johnson prescribe most?
In 2019 Medicare Part D data, Dr. Johnson's most prescribed drugs by claims were Lisinopril.
Show 3 more questionsShow fewer questions
Has Dr. Mark C. Johnson received payments from drug or device companies?
CMS Open Payments shows $116 in general payments to Dr. Johnson from 2 companies from 2019 to 2019. The largest total came from Bausch Health Americas, Inc.
How long has Dr. Mark C. Johnson been practicing?
Dr. Johnson graduated from medical school in 1982, 44 years ago.
Does Dr. Mark C. Johnson do research?
Dr. Johnson has worked on 1 clinical trial.
Selling to pediatric cardiology practices?
See pediatric cardiology physicians in Missouri by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card