Serign Mass A. Marong, MD

Medicare activity in 2024

Official CMS public-use data for Serign Mass A. Marong, 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. Insertion of needle into vein for collection of blood sample (36415)601 services
2. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)456 services
3. Blood test, lipids (cholesterol and triglycerides) (80061)348 services
4. Blood test, thyroid stimulating hormone (tsh) (84443)342 services
5. Blood test, comprehensive group of blood chemicals (80053)332 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 cholesterol75%
• High blood pressure61%
• Arthritis30%
• Depression21%
• Diabetes20%
• Ischemic heart disease20%

Hospitals where Serign Mass A. Marong works

Medicare's Facility Affiliation Data lists Serign Mass A. Marong 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.

• Northwest Medical CenterTucson, AZ · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 030085
• Oro Valley HospitalOro Valley, AZ · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 030114
• Tucson Medical CenterTucson, AZ · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 030006

Practice locations

Addresses where Serign Mass A. Marong is enrolled with Medicare (CMS data updated October 2, 2026).

• 6130 N La Cholla Blvd, Suite 100Tucson, AZ 85741 (520) 742‑4159

Group practices

Medicare enrollment lists Serign Mass A. Marong as a member of this group (CMS data updated October 2, 2026).

• Arizona Community Physicians PC161 clinicians in the group

Specialties

• Family Practiceprimary

Find other Family Practice doctors in Arizona →

Other family doctors in Tucson

Clinicians with the same Medicare primary specialty in Tucson, AZ — not a recommendation.

• Kelsey P. Lewis, MD
• Leslie A. Willingham, MD
• Thili N. Kulatilake, MD
• Loan T. Haase, MD
• Nicole H. Person-Rennell, MD
• John W. Stoughton, MD
• Stephen Dahmer, MD
• Dustin G. Morris, MD

All family doctors in Tucson →

Other clinicians in Arizona Community Physicians PC

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

• Kelsey P. Lewis, MD
• Leslie A. Willingham, MD
• Gerome B. Kantor, MD
• Vanessa Nguyen, NP
• Mark E. Maxwell, MD
• Gustavo Ortega, 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