Chelsea Pham-Wightman, MD

Medicare activity in 2024

Official CMS public-use data for Chelsea Pham-Wightman, 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 moderate level of decision making, if using time, 30 minutes or more (99214)106 services
2. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)62 services
3. Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)48 services
4. Telephone medical discussion with physician, 11-20 minutes (99442)19 services
5. Administration of influenza virus vaccine (G0008)18 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%
• Arthritis41%
• Diabetes31%
• Chronic kidney disease29%
• Ischemic heart disease25%

Hospitals where Chelsea Pham-Wightman works

Medicare's Facility Affiliation Data lists Chelsea Pham-Wightman 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. Joseph HospitalOrange, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050069

Practice locations

Addresses where Chelsea Pham-Wightman is enrolled with Medicare (CMS data updated October 2, 2026).

• 1095 Irvine BlvdTustin, CA 92780 (714) 505‑7110
• 1950 Sunny Crest Dr, Suite 2900Fullerton, CA 92835 (714) 992‑5350
• 2212 E 4th StSanta Ana, CA 92705 (714) 633‑1011
• 2501 E Chapman AveOrange, CA 92869 (714) 633‑7175
• 845 W La Veta AveOrange, CA 92868

Group practices

Medicare enrollment lists Chelsea Pham-Wightman as a member of this group (CMS data updated October 2, 2026).

• Providence Medical Foundation1,466 clinicians in the group

Specialties

• Family Practiceprimary

Find other Family Practice doctors in California →

Other family doctors in Tustin

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

• Walid A. Faraj, MD
• Laura M. Mackenzie Tangredi, DO
• Lian T. Bach, DO
• Sunil C. Mapara, MD
• Zaynab Madani, DO
• Sanae S. Ogura, MD
• Malia A. Dadsetan, DO
• Wayland Tang, MD

All family doctors in Tustin →

Other clinicians in Providence Medical Foundation

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

• Andrew T. Ngo, MD
• Andrew J. Merriman, MD
• Stephanie I. Stone, CNM
• Alexander E. Lewis, MD
• Nancy S. Armanious, MD
• Anthony I. Bae, 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