Ramon Diaz-Arrastia, MD

Medicare activity in 2024

Official CMS public-use data for Ramon Diaz-Arrastia, 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)21 services
2. 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)14 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 pressure73%
• High cholesterol71%
• Stroke or mini-stroke50%
• Arthritis48%
• Anxiety48%
• Depression44%

Hospitals where Ramon Diaz-Arrastia works

Medicare's Facility Affiliation Data lists Ramon Diaz-Arrastia 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.

• Hospital of University of PennsylvaniaPhiladelphia, PA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 390111
• Penn Presbyterian Medical CenterPhiladelphia, PA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 390223
• Pennsylvania HospitalPhiladelphia, PA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 390226

Practice locations

Addresses where Ramon Diaz-Arrastia is enrolled with Medicare (CMS data updated October 2, 2026).

• 3400 Spruce StPhiladelphia, PA 19104 (215) 662‑3606

Group practices

Medicare enrollment lists Ramon Diaz-Arrastia as a member of this group (CMS data updated October 2, 2026).

• University of Penn - Medical Group3,505 clinicians in the group

Specialties

• Neurologyprimary

Find other Neurology doctors in Pennsylvania →

Other neurologists in Philadelphia

Clinicians with the same Medicare primary specialty in Philadelphia, PA — not a recommendation.

• Brett Cucchiara, MD
• Richard E. Phillips, MD
• Matthew D. Vibbert, MD
• Samae S. Scott, MD
• Amandeep Dolla, MD
• Thomas P. Leist, MD
• Maria A. Jaramillo, MD
• Molly C. Cincotta, MD

All neurologists in Philadelphia →

Other clinicians in University of Penn - Medical Group

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

• Jennifer Lewey, MD
• James D. Park, MD
• Caitlin A. White, MD
• Allison E. Kodan, NP
• Ashley B. Landesman, MD
• Julianna M. Bertolino, PA

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