William James Selkirk, 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.

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.

• Baystate Medical Center Hospital · Springfield, MA · listed as Baystate Medical Center Inc
• Baystate Noble Hospital Hospital · Westfield, MA · listed as Baystate Noble Hospital Corporation
• Baystate Home Health Home health agency · W Springfield, MA

Colleagues at Baystate Medical Practices Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1346 clinicians in the practice; 12 are shown here.

• Ryan L Clark, DO Emergency Medicine Physician · Springfield, MA
• Dr. Ziv Corber, MD Anesthesiology Physician · Westwood, MA
• Megan Marie Elterman, NP Family Nurse Practitioner · Springfield, MA
• Thomas L Higgins, MD Critical Care Medicine (Internal Medicine) Physician · Springfield, MA
• Daniel Jaworowski, CRNA Certified Registered Nurse Anesthetist · Springfield, MA
• David S Katz, MDFACS Surgery Physician · Palmer, MA
• Megan Julia Malaj, PA-C Physician Assistant · Springfield, MA
• Dr. Hyun-Young Park, MD Internal Medicine Physician · Chicopee, MA
• Stephen J Ryzewicz, MD Addiction Medicine (Preventive Medicine) Physician · Springfield, MA
• Mark A Tidswell, MD Pulmonary Disease Physician · Springfield, MA
• Muhammad Umar, MD Internal Medicine Physician · Springfield, MA
• Long-Chau Thi Van, DO Pain Medicine (Anesthesiology) Physician · Springfield, MA

Other providers in Westfield

• Loran Willis Roberts, MD

  Individual Surgery Physician · NPI 1720066988

  75 Springfield Rd Ste 3, Westfield, MA 01085-1790 · (413) 572-2973

• Abou-Kacem Sekkal, MD

  Individual Surgery Physician · NPI 1912966466

  115 W Silver St, Westfield, MA 01085-3628 · (413) 572-6010