Mahdieh Fallahtafti, DO

Medicare activity in 2024

Official CMS public-use data for Mahdieh Fallahtafti, 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. Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)175 services
2. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)98 services
3. Transitional care management services for problem of at least moderate complexity (99495)18 services
4. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)17 services
5. Hospital discharge day management, 30 minutes or less (99238)11 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 cholesterol75%
• Arthritis61%
• Ischemic heart disease46%
• Atrial fibrillation43%
• Chronic kidney disease38%

Hospitals where Mahdieh Fallahtafti works

Medicare's Facility Affiliation Data lists Mahdieh Fallahtafti 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.

• Hoag Memorial Hospital PresbyterianNewport Beach, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050224
• Providence Mission HospitalMission Viejo, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050567

Practice locations

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

• 1950 Sunny Crest Dr, Suite 2900Fullerton, CA 92835 (714) 992‑5350
• 26800 Crown Valley PkwyMission Viejo, CA 92691
• 27700 Medical Ctr RdMission Viejo, CA 92691 (949) 364‑1400

Group practices

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

• Providence Medical Foundation1,466 clinicians in the group

Specialties

• Internal Medicineprimary

Find other Internal Medicine doctors in California →

Other internal medicine doctors in Fullerton

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

• Edward J. Lee, MD
• Stephen Yoon, MD
• Leslie I. Lu, MD
• Ehsan Safaie Fard, MD
• Samuel C. Nixon, MD
• James G. Joachim, MD
• Afshin Y. Doust, MD
• Madineth Muy, MD

All internal medicine doctors in Fullerton →

Other clinicians in Providence Medical Foundation

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

• Jorge M. Galdamez, MD
• Giovanni M. Salerno, MD
• Fernando G. Martinez, MD
• Katie A. Yamanishi, NP
• Daniel J. Ochalek, MD
• Bennet Davis, 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