Quick answers
- Does Timothy J. Killeen accept Medicare assignment?
- Yes. Medicare's clinician data says Timothy J. Killeen 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 Timothy J. Killeen see?
- In 2024, CMS data shows 825 Original Medicare patients and 13,839 services for Timothy J. Killeen. This counts Original Medicare only and measures volume, not quality.
- What is Timothy J. Killeen's NPI number?
- 1154426849. 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 Timothy J. Killeen, 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 | 825 |
|---|---|
| Services billed to Medicare | 13,839 |
| Different services or procedures | 32 |
| Participating Medicare provider | Yes |
| Average age of these patients | 77 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)1,028 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)647 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)371 services
- Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)252 services
- Transitional care management services for problem of high complexity (99496)84 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%
- Arthritis53%
- Ischemic heart disease48%
- COPD45%
- Diabetes43%
Hospitals where Timothy J. Killeen works
Medicare's Facility Affiliation Data lists Timothy J. Killeen 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.
- Hoag Memorial Hospital PresbyterianNewport Beach, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050224
- Loma Linda University Medical Center-MurrietaMurrieta, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 050770
- Southwest Healthcare Rancho Springs HospitalMurrieta, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050701
- Temecula Valley HospitalTemecula, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050775
Practice locations
Addresses where Timothy J. Killeen is enrolled with Medicare (CMS data updated October 2, 2026).
- 29645 Rancho California RdTemecula, CA 92591 (951) 694‑4304
- 31700 Temecula PkwyTemecula, CA 92592 (951) 331‑2200
Group practices
Medicare enrollment lists Timothy J. Killeen as a member of this group (CMS data updated October 2, 2026).
- Temecula Valley Hospitalist Medical Group Inc29 clinicians in the group
Specialties
- Internal Medicineprimary
- Pulmonary Diseasealso
Other internal medicine doctors in Temecula
Clinicians with the same Medicare primary specialty in Temecula, CA — not a recommendation.
Other clinicians in Temecula Valley Hospitalist Medical Group Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Loma Linda University School Of Medicine |
| Graduation year | 1984 (42 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1154426849 |
| 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