Karen Simpson, 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.

Colleagues at Providence Medical Foundation

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1465 clinicians in the practice; 12 are shown here.

• Kimberlee Adams, NP Nurse Practitioner · Eureka, CA
• Dr. Katherine Nandor Alconcel, DO Internal Medicine Physician · Apple Valley, CA
• Dr. Chan Myat Aung, MD Student in an Organized Health Care Education/Training Program · Pomona, CA
• Mrs. Martha Carranza, NP Family Nurse Practitioner · Mission Viejo, CA
• Laura Anne Cosenza, CNP Nurse Practitioner · Santa Rosa, CA
• Danielle Dvorak Evans, PA Physician Assistant · Orange, CA
• Jennifer Hahr, MD Student in an Organized Health Care Education/Training Program · Sylmar, CA
• Wes Shen-Lin Lee, MD Hematology (Internal Medicine) Physician · Santa Rosa, CA
• Shruti Pravinkumar Patel, MD Student in an Organized Health Care Education/Training Program · Sacramento, CA
• Harsharandeep Sanghera, MD Multi-Specialty Group · Pomona, CA
• Jennifer Lynn Spignese, FNP-C, MSN, RN Nurse Practitioner · Mission Viejo, CA
• Tsigereda Tesfaye, NP Family Nurse Practitioner · Tustin, CA

Other providers in Brea

• Alexandra Edelman, MD

  Individual Dermatology Physician · NPI 1700240249

  955 W Imperial Hwy Ste 200, Brea, CA 92821-3812 · (714) 626-6310

• Chiangyuan Chuck Liau, MD

  Individual Dermatology Physician · NPI 1891721171

  875 N Brea Blvd, Brea, CA 92821-2606 · (714) 529-6842

• Zhe Hou, MD, Ph D , a Professional Corporation

  Organization Dermatology Physician · NPI 1710508874

  3000 E Imperial Hwy Ste 150, Brea, CA 92821-6782 · (714) 987-1818