Nils Johnson is a Cardiology physician affiliated with Memorial Hermann. OpenAlex indexes 337 publications with 8,452 citations (h-index 45); ClinicalTrials.gov lists 2 registered studies matched to this name.
Overview
Scholarship
indexed output and impact (OpenAlex)Distinct works indexed by OpenAlex, matched via ORCID.
Total citations across indexed works.
Hirsch index, productivity × impact (OpenAlex).
Clinical & industry
trials, payments and federal fundingContact
The practice address and phone this provider lists in the federal NPPES (CMS) registry.
Practice address
6431 Fannin St
Room Msb 4.256
Houston, TX 770301501
Telephone
713-500-6611Provider last certified this registry record 28 Sept 2022.
Clinical trials
- Combined Pressure and Flow Measurements to Guide Treatment of Coronary Stenoses
Sponsor: The University of Texas Health Science Center, Houston
- CONTRAST (Can cONTrast Injection Better Approximate FFR compAred to Pure reSTing Physiology?)
Sponsor: The University of Texas Health Science Center, Houston
Registered studies on ClinicalTrials.gov where the overall official or a site investigator name-matches this physician, confirmed against known institution/geography. Latest few shown; the full list is part of the full profile.
Industry payments
8 companies reported payments to CMS in program years 2021 onward. These are public disclosures, not judgments. The latest:
- Boston Scientific CorporationProgram year20252 payments
- Bracco Diagnostics Inc.Program year20253 payments
- Abbott LaboratoriesProgram year20251 payment
Payment records matched to this physician's NPI in CMS Open Payments, program years 2021 onward.
Medicare prescribing footprint (2024)
The drugs this prescriber writes for Medicare patients, grouped by drug class and therapeutic area. Every percentage is a share of their total prescribing, so you can see what they prescribe most. These are proportions, not patient counts or dollar amounts. No condition is inferred: the claims record what was prescribed, never why.
Cardiovascular
78.1%Statin16.5%Atorvastatin Calcium77%Rosuvastatin Calcium23%Part D≥56 patientsCalcium channel blocker12.2%Amlodipine Besylate77%Nifedipine Er13%Felodipine Er11%Part D<11 patients+ 12 more classes in this area
Blood & clotting
16.8%Factor Xa inhibitor9.5%Eliquis55%Xarelto45%Part D<11 patientsP2Y12 inhibitor5.8%Clopidogrel100%Part D≥26 patients+ 1 more class in this area
Metabolism & gastrointestinal
5.2%SGLT2 inhibitor3.3%Farxiga51%Jardiance49%Part D<11 patientsProton pump inhibitor1.8%Pantoprazole Sodium100%Part D<11 patients
Drug classes come from the WHO ATC and U.S. National Library of Medicine (RxClass) classifications; prescribing counts come from the CMS Medicare Part D Prescribers file. Each drug is counted once, under its primary class. Medicare fee-for-service only, so no Medicare Advantage, commercial, or pediatric prescribing is included. CMS publishes this data about 17 months after the fact.
Publications
Matched to this physician's OpenAlex author record; most-cited works shown first.
Similar KOLs
Other experts from the same institution or the same specialty.
Baha Sibai, MD
Memorial Hermann
James Grotta, MD
Memorial Hermann
Hope Northrup, MD
Memorial Hermann
Anthony Estrera, MD
Memorial Hermann
A basic profile from our physician directory: identity and practice contact from the federal NPPES registry, research from OpenAlex, trials from ClinicalTrials.gov, payments from CMS Open Payments — shown itemized where we have matched records, as a count where we only have a total. This person hasn't been through our full identity-adjudication pipeline yet, so funding, congress activity and public presence aren't shown. Absence of a section means “not yet looked,” never “none found.”