Dr. Amanda Verienna Hayman, MD, MPH

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.

• Providence Portland Medical Center Hospital · Portland, OR

Colleagues at The Oregon Clinic, PC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 352 clinicians in the practice; 12 are shown here.

• Dr. Brian Matthew Blair, MD Urology Physician · Gresham, OR
• Dr. William M.l. Bowerfind, MD Critical Care Medicine (Internal Medicine) Physician · Portland, OR
• Rebecca A. Bremner, MD Dermatology Physician · Portland, OR
• Dr. Andrew Benjamin Cramer, MD Surgery Physician · Tualatin, OR
• Leonardo Elias Garcia, MD Colon & Rectal Surgery Physician · Portland, OR
• Kathryn W Hendrickson, MD Pulmonary Disease Physician · Portland, OR
• Richard Lindsay Jamison, MD Surgery Physician · Portland, OR
• Kareen Leavens, PA-C Surgical Physician Assistant · Portland, OR
• Shannon Kimberly Lewis, MD Internal Medicine Physician · Portland, OR
• Joshua Andrew Ramseyer, MD Neurology Physician · Beaverton, OR
• Dr. Kim Raymond Swartz, MD Surgery Physician · Beaverton, OR
• Dr. Frank Manley Warren III, MD Otology & Neurotology Physician · Portland, OR

Other providers in Portland

• Scott M Browning, MD

  Individual Colon & Rectal Surgery Physician · NPI 1841362928

  9155 SW Barnes Rd #211, Portland, OR 97225-6625 · (503) 216-5380

• Megan M Cavanaugh, MD

  Individual Colon & Rectal Surgery Physician · NPI 1962578104

  9155 SW Barnes Rd Ste 231, Portland, OR 97225-6625 · (503) 216-5380

• Leonardo Elias Garcia, MD

  Individual Colon & Rectal Surgery Physician · NPI 1790346393

  4805 NE Glisan St Ste 6N60, Portland, OR 97213-2933 · (503) 281-0561

• Olga R Garcia, DO

  Individual Colon & Rectal Surgery Physician · NPI 1356721344

  2222 NW Lovejoy St Ste 601, Portland, OR 97210-5104 · (503) 413-5514

• Daniel Owen Herzig, MD

  Individual Colon & Rectal Surgery Physician · NPI 1841205358

  3303 SW Bond Ave, Portland, OR 97239-4501 · (503) 494-4373

• Dr. Richard Uwaka Kalu, MD, MPH

  Individual Colon & Rectal Surgery Physician · NPI 1285990036

  9155 SW Barnes Rd Ste 231, Portland, OR 97225-6653 · (971) 254-9884

• Paul Michael Kaminsky, MD/PHD

  Individual Colon & Rectal Surgery Physician · NPI 1295173763

  2222 NW Lovejoy St Ste 601, Portland, OR 97210 · (503) 413-5514

• Dr. Christopher Jay Longaker, MD

  Individual Colon & Rectal Surgery Physician · NPI 1194090399

  12235 NW Big Fir Cir, Portland, OR 97229-3903 · (503) 644-2934