Marcia A. Oliver, MD

Medicare activity in 2024

Official CMS public-use data for Marcia A. Oliver, 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. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)55 services
2. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)33 services
3. Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count (85025)25 services
4. Insertion of needle into vein for collection of blood sample (36415)21 services
5. Hemoglobin a1c level (83036)20 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 pressure67%
• Diabetes52%
• Arthritis45%
• High cholesterol27%

Hospitals where Marcia A. Oliver works

Medicare's Facility Affiliation Data lists Marcia A. Oliver 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.

• Guam Memorial Hospital AuthorityTamuning, GU · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 650001

Practice locations

Addresses where Marcia A. Oliver is enrolled with Medicare (CMS data updated October 2, 2026).

• 850 Gov Carlos G Camacho RdTamuning, GU 96913 (671) 647‑2552
• PO Box, Suite 1946Taos, NM 87571 (575) 758‑6966

Group practices

Medicare enrollment lists Marcia A. Oliver as a member of these groups (CMS data updated October 2, 2026).

• Guam Memorial Hospital131 clinicians in the group
• Taos Picuris Health Center9 clinicians in the group

Specialties

• Emergency Medicineprimary

Find other Emergency Medicine doctors in Guam →

Other emergency medicine doctors in Tamuning

Clinicians with the same Medicare primary specialty in Tamuning, GU — not a recommendation.

• Jonatan Rojas, MD
• Aaron C. Johansen, MD
• Norak P. Chhieng, MD
• Johnny J. Kim, MD
• John S. Hunt Jr., MD
• Shawn Reed, MD
• Scott K. Erickson, MD
• Jasmine Sinkhada, MD

All emergency medicine doctors in Tamuning →

Other clinicians in Guam Memorial Hospital

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

• Jonatan Rojas, MD
• Florencio Lizama, MD
• Fernan F. De Guzman, MD
• Srinivasareddy Vuyyuru, MD
• Sungwook Kim, DPM
• Sally Westcott, 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