Tanya B. Dorff, MD

Medicare activity in 2024

Official CMS public-use data for Tanya B. Dorff, 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)707 services
2. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)347 services
3. Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)95 services
4. New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)51 services
5. Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)47 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).

• Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)75%
• High cholesterol74%
• High blood pressure72%
• Ischemic heart disease37%
• Arthritis36%
• Diabetes31%

Hospitals where Tanya B. Dorff works

Medicare's Facility Affiliation Data lists Tanya B. Dorff 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.

• Eisenhower Medical CenterRancho Mirage, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050573
• Loma Linda University Medical CenterLoma Linda, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050327

Practice locations

Addresses where Tanya B. Dorff is enrolled with Medicare (CMS data updated October 2, 2026).

• 1500 Duarte RdDuarte, CA 91010 (626) 256‑4673
• 1500 E Duarte RdDuarte, CA 91010
• 209 Fair Oaks AveSouth Pasadena, CA 91030 (626) 396‑2900

Group practices

Medicare enrollment lists Tanya B. Dorff as a member of this group (CMS data updated October 2, 2026).

• City of Hope Medical Foundation982 clinicians in the group

Specialties

• Medical Oncologyprimary
• Internal Medicinealso

Find other Medical Oncology doctors in California →

Other oncologists in Duarte

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

• Lauren J. Antrim, MD
• Manana Elia, MD
• Daniel Von Hoff, MD
• Ravi Salgia, MD
• Abhishek Tripathi, MD
• Mary Cianfrocca, DO
• Vincent Chung, MD
• Hannah L. Chang, MD

All oncologists in Duarte →

Other clinicians in City of Hope Medical Foundation

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

• Elaine W. Dawson, CP
• George Hajjar, MD
• Dina F. Bierman, MD
• Kambiz Farbakhsh, MD
• Bradley A. Restivo, MD
• Geoffrey Shouse, DO

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