Nathaniel Rohde Woodruff, MD, PHD, FACC

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.

• Providence St Peter Hospital Hospital · Olympia, WA
• Uphs Marquette Dlp Hospital Hospital · Marquette, MI · listed as Dlp Marquette General Hospital LLC

Colleagues at Dlp Marquette Physician Practices Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 190 clinicians in the practice; 12 are shown here.

• Eliza Rose Bischof, PA-C Physician Assistant · Marquette, MI
• Christine Lynn Croney, PA-C Medical Physician Assistant · Marquette, MI
• Alycia Davidson, FNP-C Family Nurse Practitioner · Marquette, MI
• Cheryl Davison, MD Radiation Oncology Physician · Yakima, WA
• Samir Dengle, MD Student in an Organized Health Care Education/Training Program · Waterbury, CT
• Miss. Ingrid Anna Hoenke, RD, PA-C Registered Dietitian · Marquette, MI
• Jerold S Napier, MD Nephrology Physician · Marquette, MI
• David Arvo Pesola, MD Cardiovascular Disease Physician · Marquette, MI
• Dr. Amanda Jean Schafer Johnson, PHD Clinical Neuropsychologist · Marquette, MI
• Shelby Lynne Stevens, DNP Family Nurse Practitioner · Marquette, MI
• Zackery J Tegge, MCMS, PA-C Physician Assistant · Christiansted, VI
• Mr. Cameron Wilcox, MD Diagnostic Neuroimaging (Psychiatry & Neurology) Physician · Marquette, MI

Other providers in Grass Valley

• Mr. John A Mallery, MD

  Individual Cardiovascular Disease Physician · NPI 1780664201

  150 Catherine Ln #D, Grass Valley, CA 95945 · (530) 477-8358

• Dr. Kenneth S Marvin, MD

  Individual Cardiovascular Disease Physician · NPI 1417035221

  155 Glasson Way, Grass Valley, CA 95945-5723 · (530) 274-6000

• Rp Zucker MD a Medical Corporation

  Organization Cardiovascular Disease Physician · NPI 1124005368

  155 Glasson Way, Grass Valley, CA 95945 · (530) 241-1473

• Dr. Ryan Glen Smith, MD

  Individual Cardiovascular Disease Physician · NPI 1639197452

  150 Catherine Ln Ste J, Grass Valley, CA 95945-5719 · (530) 477-8358