Practice address
1045 N 30th St
Billings, MT 59101
This is the address of Billings Clinic Specialty Supplies and Services, LLC.
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At a glance
- Clinicians registered here
- 15
- Physicians (MD and DO)
- 9
- Specialties
- 8
- Industry payments to them, 2025
- $1,214
Specialties here
Who practices here
15 clinicians
- Brenda Flaherty Student in an Organized Health Care Education/Training Program
- Christa L. Boggis-delacruz, MD OB-GYN (Obstetrics & Gynecology)
- Christopher H. Sorli, MD Endocrinology & Diabetes
- David F. Johnson, MD Endocrinology & Diabetes
- Diane W. Kersten, LCSW Clinical Social Workers
- Gabriel Blomquist, P.A. Physician Assistants
- Howard R. Knapp, MD Internal Medicine
- James A. Mack, MD Endocrinology & Diabetes
- Kristen L. Zack, MD Nephrology (Kidney)
- Landon E. Horst, RD Registered Dietitians
- Lauren E. Kleess, M.D. Endocrinology & Diabetes
- Mary Pike, LCSW Clinical Social Workers
- Reed S. Christensen, M.D. Endocrinology & Diabetes · Department of Diabetes and Endocrinology
- Stephanie M. Welch, LRD Registered Dietitians
- Xiu Ying Au Endocrinology & Diabetes
Hospitals and medical groups at this address
From Medicare Care Compare. Numbers on the right are each organization’s clinicians in total.
Industry payments
Drug and device makers reported $1,214 in general payments to 6 clinicians at this address in 2025.
- Gabriel Blomquist, P.A. $418
- David F. Johnson, MD $223
- Xiu Ying Au $176
- Kristen L. Zack, MD $161
- Christopher H. Sorli, MD $124
- Lauren E. Kleess, M.D. $113
CMS Open Payments (meals, speaking, consulting and similar; not research). A payment is not evidence of wrongdoing.
Industry-funded research
2 clinicians here are named as investigators on industry-funded studies ($288,268 in research payments reported in 2025).
Research payments usually go to the hospital or research site, not to the investigator personally.
Organizations registered here
- Billings Clinic Endocrinology & Diabetes
- Billings Clinic Mobile Radiology Clinic/Center
- Billings Clinic Research Study Specialist
Sources: CMS NPPES NPI Registry (who is registered at this address, as each clinician reported it), Medicare Care Compare (hospitals and groups), CMS Open Payments 2025. Addresses can be out of date; call before visiting.