Dr. Peter V Johnston, MD

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

• Johns Hopkins Bayview Medical Center Hospital · Baltimore, MD
• Johns Hopkins Hospital, The Hospital · Baltimore, MD · listed as The Johns Hopkins Hospital
• Johns Hopkins Howard County Medical Center Hospital · Columbia, MD

Colleagues at Johns Hopkins University

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 2855 clinicians in the practice; 12 are shown here.

• Dr. Alexander Joseph Ambinder, MD Medical Oncology Physician · Baltimore, MD
• Promise Ariyo, MD Critical Care Medicine (Anesthesiology) Physician · Baltimore, MD
• Dr. Olaya Brewer Gutierrez, MD Gastroenterology Physician · Baltimore, MD
• Alexander Kamal Daniel General Practice Dentistry · Baltimore, MD
• Dr. Brandi Galloway, CRNP Women's Health Nurse Practitioner · Baltimore, MD
• Dr. Che Matthew Harris, MD Internal Medicine Physician · Washington D.C., DC
• Mariam Hussain, PA-C Physician Assistant · Salisbury, MD
• Zachary Nathan Kon, MD Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Manhasset, NY
• Kathryn Lee-Young, CRNP Adult Health Nurse Practitioner · Westminster, MD
• Dr. Jessica Queen, MD, PHD Internal Medicine Physician · Baltimore, MD
• Jessica Marie Sloat, PA-C Physician Assistant · Baltimore, MD
• Dr. Emmanouil Tampakakis, MD Internal Medicine Physician · Boston, MA

Other providers in Baltimore

• Sandeep Mahendra Jani, MD, MPH

  Individual Cardiovascular Disease Physician · NPI 1750549333

  9105 Franklin Square Dr Ste 209, Baltimore, MD 21237-3930 · (443) 777-2370

• Johns Hopkins Regional Physicians LLC

  Organization Cardiovascular Disease Physician · NPI 1609195320

  600 N Wolfe St, Baltimore, MD 21287-0005 · (410) 955-5000

• Johns Hopkins University

  Organization Cardiovascular Disease Physician · NPI 1801891080

  600 N Wolfe St, Baltimore, MD 21287-0005 · (410) 933-4397

• Dr. Rodney A. Johnson, MD

  Individual Cardiovascular Disease Physician · NPI 1356344659

  9105 Franklin Square Dr Ste 209, Baltimore, MD 21237-3930 · (410) 602-9262

• Dr. Steven R Jones, MD

  Individual Cardiovascular Disease Physician · NPI 1821047531

  600 N Wolfe St Carnegie 568, Baltimore, MD 21287-0005 · (410) 955-3097

• Dr. Brian H Kahn, MD

  Individual Cardiovascular Disease Physician · NPI 1609879907

  7602 Belair Rd, Baltimore, MD 21236-4088 · (410) 663-6986

• Dr. Mohammed Yousef Kanjwal, MD

  Individual Cardiovascular Disease Physician · NPI 1376537407

  5051 Greenspring Ave Ste 304, Baltimore, MD 21209 · (410) 601-9355

• Dr. Navin Kumar Kapur, MD

  Individual Cardiovascular Disease Physician · NPI 1902959554

  600 N Wolfe St, Baltimore, MD 21205-2101 · (410) 955-5000