Quick answers
- Does Jeffrey B. Halldorson accept Medicare assignment?
- Yes. Medicare's clinician data says Jeffrey B. Halldorson 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 Jeffrey B. Halldorson see?
- In 2024, CMS data shows 95 Original Medicare patients and 131 services for Jeffrey B. Halldorson. This counts Original Medicare only and measures volume, not quality.
- What is Jeffrey B. Halldorson's NPI number?
- 1558446351. 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 Jeffrey B. Halldorson, 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 | 95 |
|---|---|
| Services billed to Medicare | 131 |
| Different services or procedures | 20 |
| Participating Medicare provider | Yes |
| Average age of these patients | 57 |
Most frequent services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)34 services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)21 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)21 services
- Transplantation of donor kidney (50360)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%
- Chronic kidney disease75%
- Diabetes71%
- Ischemic heart disease44%
- Heart failure44%
Hospitals where Jeffrey B. Halldorson works
Medicare's Facility Affiliation Data lists Jeffrey B. Halldorson 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.
- Sharp Memorial HospitalSan Diego, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050100
Practice locations
Addresses where Jeffrey B. Halldorson is enrolled with Medicare (CMS data updated October 2, 2026).
- 8010 Frost St, Suite 100San Diego, CA 92123 (858) 637‑4700
- 8885 Rio San Diego Dr, Suite 212San Diego, CA 92108 (619) 299‑2350
Group practices
Medicare enrollment lists Jeffrey B. Halldorson as a member of this group (CMS data updated October 2, 2026).
- Balboa Nephrology Medical Group Inc76 clinicians in the group
Specialties
- General Surgeryprimary
Other general surgeons in San Diego
Clinicians with the same Medicare primary specialty in San Diego, CA — not a recommendation.
Other clinicians in Balboa Nephrology Medical Group Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Michigan Medical School |
| Graduation year | 1992 (34 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1558446351 |
| 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