Stella Hartono, MD

Medicare activity in 2024

Official CMS public-use data for Stella Hartono, 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 low level od decision making, if using time, 20 minutes or more (99213)31 services
2. Test to measure the level of nitric oxide gas (95012)22 services
3. Test to measure expiratory airflow and volume (94010)21 services
4. 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)12 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%
• Asthma69%
• Arthritis52%
• Ischemic heart disease38%
• Diabetes29%

Hospitals where Stella Hartono works

Medicare's Facility Affiliation Data lists Stella Hartono 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.

• Stanford Health CareStanford, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050441

Practice locations

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

• 300 Pasteur DrStanford, CA 94305 (650) 723‑4000
• 6643 N Milburn Ave, Suite 101Fresno, CA 93722 (559) 275‑1400
• 7471 N Fresno StFresno, CA 93720 (559) 436‑4500

Group practices

Medicare enrollment lists Stella Hartono as a member of these groups (CMS data updated October 2, 2026).

• Stanford Health Care3,122 clinicians in the group
• Baz Allergy Asthma and Sinus Center Inc23 clinicians in the group

Specialties

• Allergy/Immunologyprimary
• Pediatric Medicinealso

Find other Allergy/Immunology doctors in California →

Other allergist and immunologists in Stanford

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

• Linda J. Zhu, MD
• Anna J. Arroyo, MD
• Jennifer M. Camacho, MD
• Meng Chen, MD
• Michelle F. Huffaker, MD
• Jyothi I. Tirumalasetty, MD
• Anne Y. Liu, MD
• Rebecca S. Chinthrajeh, MD

All allergist and immunologists in Stanford →

Other clinicians in Stanford Health Care

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

• Kayvon Sotoudeh, MD
• Kristen K. Steenerson, MD
• Brian T. Bateman, MD
• Ola A. Al-Ewaidat, MD
• Gloria L. Hwang, MD
• Sripriya Chari

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