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Internal Medicine

Hesham Hassaballa, MD

Works at hospitals in Dover, DE · Aurora, IL · Olympia Fields, IL … · Delaware, Illinois, California

Summary

Dr. Hesham Hassaballa, MD is an internal medicine doctor at 1111 Crater Lake Ave, Medford, OR 97504. Phone: (541) 732-5000. May accept Medicare assignment. In 2024, Hesham Hassaballa had 276 Original Medicare patients and 603 services. NPI 1861440893. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

From official Medicare data

This page shows what Medicare's official clinician data says about Hesham Hassaballa, joined by NPI number (data updated October 2, 2026). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

Quick answers

Does Hesham Hassaballa accept Medicare assignment?
Medicare's clinician data says Hesham Hassaballa may accept Medicare assignment (as of October 2, 2026). Ask the office whether they accept it for your visit.
How many Medicare patients does Hesham Hassaballa see?
In 2024, CMS data shows 276 Original Medicare patients and 603 services for Hesham Hassaballa. This counts Original Medicare only and measures volume, not quality.
What is Hesham Hassaballa's NPI number?
1861440893. 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 Hesham Hassaballa, 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 patients276
Services billed to Medicare603
Different services or procedures12
Participating Medicare providerYes
Average age of these patients73

Most frequent services

  1. Critical care, first 30-74 minutes (99291)289 services
  2. Critical care, each additional 30 minutes (99292)115 services
  3. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)85 services
  4. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)67 services
  5. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)13 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%
  • Ischemic heart disease56%
  • Diabetes55%
  • Heart failure54%
  • Chronic kidney disease50%

Hospitals where Hesham Hassaballa works

Medicare's Facility Affiliation Data lists Hesham Hassaballa 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.

Practice locations

Addresses where Hesham Hassaballa is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 17; the Medicare profile lists all.

Group practices

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

  • Inpatient Specialists of California PC385 clinicians in the group
  • Cogent Healthcare of Texas PA113 clinicians in the group
  • Sound Physicians Intensivists of Washington PLLC84 clinicians in the group
  • Critical Care Physicians of Pennsylvania PC51 clinicians in the group
  • Critical Care Physicians of Illinois LLC38 clinicians in the group
  • Hospitalist Medicine Physicians of Delaware, PA33 clinicians in the group

Specialties

Find other Internal Medicine doctors in Oregon →

Other internal medicine doctors in Medford

Clinicians with the same Medicare primary specialty in Medford, OR — not a recommendation.

All internal medicine doctors in Medford →

Other clinicians in Inpatient Specialists of California PC

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

Clinician information

CredentialMD
Graduation year1999 (27 years since medical school)
Gender (as listed)Male
Medicare assignmentMay accept for some services
TelehealthOffers telehealth services
NPI (National Provider Identifier)1861440893
CorrectionsReport 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

  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