Quick answers
- Does Helen S. Diiulio accept Medicare assignment?
- Yes. Medicare's clinician data says Helen S. Diiulio accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Helen S. Diiulio see?
- In 2024, CMS data shows 123 Original Medicare patients and 232 services for Helen S. Diiulio. This counts Original Medicare only and measures volume, not quality.
- What is Helen S. Diiulio's NPI number?
- 1215411830. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Helen S. Diiulio, 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.
| Original Medicare patients | 123 |
|---|---|
| Services billed to Medicare | 232 |
| Different services or procedures | 11 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
Most frequent services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)176 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)28 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 pressure66%
- High cholesterol62%
- Chronic kidney disease44%
- Arthritis37%
- Depression24%
- Diabetes22%
Hospitals where Helen S. Diiulio works
Medicare's Facility Affiliation Data lists Helen S. Diiulio 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.
- UCSF Medical CenterSan Francisco, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050454
Practice locations
Addresses where Helen S. Diiulio is enrolled with Medicare (CMS data updated October 2, 2026).
- 400 Parnassus AveSan Francisco, CA 94143 (415) 476‑4029
Group practices
Medicare enrollment lists Helen S. Diiulio as a member of this group (CMS data updated October 2, 2026).
- Regents of the University of California732 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in San Francisco
Clinicians with the same Medicare primary specialty in San Francisco, CA — not a recommendation.
Other clinicians in Regents of the University of California
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2018 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1215411830 |
| Corrections | Report an error or suggest an update → |
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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians