Douglas J. Parker, MD

Medicare activity in 2024

Official CMS public-use data for Douglas J. Parker, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Most frequent services

1. Emergency department visit with high level of medical decision making (99285)232 services
2. Emergency department visit with moderate level of medical decision making (99284)113 services
3. Emergency department visit with low level of medical decision making (99283)52 services
4. Critical care, first 30-74 minutes (99291)21 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

• High blood pressure75%
• High cholesterol64%
• Arthritis52%
• Diabetes39%
• Depression38%
• Anxiety37%

Hospitals where Douglas J. Parker works

Medicare's Facility Affiliation Data lists Douglas J. Parker at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

• Cody Regional HealthCody, WY · Critical Access Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 531312
• Intermountain Health St Vincent Regional HospitalBillings, MT · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 270049

Practice locations

Addresses where Douglas J. Parker is enrolled with Medicare (CMS data updated October 2, 2026).

• 1233 N 30th StBillings, MT 59101
• 16 N Miles Ave, Suite 101Hardin, MT 59034 (406) 237‑8270
• 400 S Clark StButte, MT 59701 (406) 495‑7260

Group practices

Medicare enrollment lists Douglas J. Parker as a member of these groups (CMS data updated October 2, 2026).

• SCL Health Medical Group - Billings LLC297 clinicians in the group
• SCL Health Medical Group-Butte LLC100 clinicians in the group

Specialties

• Emergency Medicineprimary

Find other Emergency Medicine doctors in Montana →

Other emergency medicine doctors in Billings

Clinicians with the same Medicare primary specialty in Billings, MT — not a recommendation.

• Peter J. Light, MD
• Michelle Hintz, DO
• Daniel J. Lewis, MD
• Jonathan M. Baugh, DO
• Nathan Allen, MD
• Jamiee L. Belsky, MD
• Daniel Hurst, DO
• Jedediah O. Walker, DO

All emergency medicine doctors in Billings →

Other clinicians in SCL Health Medical Group - Billings LLC

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

• Jodi L. Peterson
• Wendy M. Gomendi, NP
• Lisa B. Bland, MD
• Gage F. Henderson, PA
• Geraldine B. Mournian, MD
• Kristopher G. Cunningham, MD

Clinician information

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
6. Medicare Care Compare — official Medicare tool to look up clinicians