Mark Boonyasampant, MD

Medicare activity in 2024

Official CMS public-use data for Mark Boonyasampant, 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. Pathology examination of tissue using a microscope, intermediate complexity (88305)1,111 services
2. Special stained specimen slides to examine tissue, each additional procedure (88341)525 services
3. Special stained specimen slides to examine tissue, initial procedure (88342)204 services
4. Pathology examination of tissue using a microscope, moderately low complexity (88304)174 services
5. Special stained specimen slides to examine tissue including interpretation and report (88313)125 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 pressure73%
• Arthritis51%
• Diabetes33%
• Chronic kidney disease28%
• Ischemic heart disease26%

Hospitals where Mark Boonyasampant works

Medicare's Facility Affiliation Data lists Mark Boonyasampant 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.

• Providence St. Jude Medical CenterFullerton, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050168

Practice locations

Addresses where Mark Boonyasampant is enrolled with Medicare (CMS data updated October 2, 2026).

• 101 E Valencia Mesa DrFullerton, CA 92835 (714) 446‑7505

Group practices

Medicare enrollment lists Mark Boonyasampant as a member of this group (CMS data updated October 2, 2026).

• The Pathology Group Inc6 clinicians in the group

Specialties

• Pathologyprimary

Find other Pathology doctors in California →

Other pathologists in Fullerton

Clinicians with the same Medicare primary specialty in Fullerton, CA — not a recommendation.

• Junming Fang, MD
• John B. Broussard, MD
• Aditya S. Kuwadekar, MD
• Yi Zhuang, MD
• Sandhya M. John, MD

All pathologists in Fullerton →

Other clinicians in The Pathology Group Inc

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

• Junming Fang, MD
• Aditya S. Kuwadekar, MD
• Yi Zhuang, MD
• Sandhya M. John, 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