Dr. Evan L Siegel, MD

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.

Affiliated with 1 inpatient rehabilitation facility, which CMS identifies by certification number only.

Colleagues at Arthritis and Rheumatism Associates PC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 56 clinicians in the practice; 12 are shown here.

• Norhan Abdalla Physician Assistant · Rockville, MD
• Jordan Arbuckle Physical Therapist · Bethesda, MD
• Alyssa Michelle Bosso, MD Rheumatology Physician · Frederick, MD
• Dr. Albert Galdi, MD Neuromusculoskeletal Medicine & OMM Physician · Wheaton, MD
• Henok Berhanu Habteyes, DPT Physical Therapist · Silver Spring, MD
• Jisoo Jang, PA-S Rheumatology Physician · Rockville, MD
• Mary Margaret Machaca, RD, LD Registered Dietitian · Derwood, MD
• Charles Oshinsky, MD Rheumatology Physician · Chevy Chase, MD
• Laura Ashley Robbins, PA-C Physician Assistant · Chevy Chase, MD
• Alexander Thompson, PT, DPT Physical Therapist · Silver Spring, MD
• Mrs. Katerina Vlckova, MPT Physical Therapist · Rockville, MD
• Katelyn Weeks Mills Physical Therapist · Wheaton, MD

Other providers in Rockville

• Nitasha Kumar, MD

  Individual Rheumatology Physician · NPI 1093135113

  14995 Shady Grove Rd Ste 500, Rockville, MD 20850-8726 · (301) 942-7600

• Jeffery A. Potter, MD

  Individual Rheumatology Physician · NPI 1295994481

  14995 Shady Grove Rd Ste 500, Rockville, MD 20850-8726 · (301) 942-7600

• Dr. Guada R Respicio Duque, MD

  Individual Rheumatology Physician · NPI 1659560266

  14995 Shady Grove Rd Ste 250, Rockville, MD 20850-8727 · (301) 942-7600

• Dr. Lawrence H Schainker, MD

  Individual Rheumatology Physician · NPI 1790781888

  1201 Seven Locks Rd Ste 111, Rockville, MD 20854-2957 · (301) 762-5020

• Dr. Sonia Daria Silinsky Krupnikova, MD

  Individual Rheumatology Physician · NPI 1477085918

  14995 Shady Grove Rd Ste 500, Rockville, MD 20850-8726 · (301) 942-7600

• Dr. Louis Simchowitz, MD

  Individual Rheumatology Physician · NPI 1982030342

  1201 Seven Locks Rd Ste 111, Rockville, MD 20854-2931 · (301) 762-5020