Quick answers
- Does John Paul Iii McKenzie accept Medicare assignment?
- Yes. Medicare's clinician data says John Paul Iii McKenzie 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 John Paul Iii McKenzie see?
- In 2024, CMS data shows 2,509 Original Medicare patients and 11,178 services for John Paul Iii McKenzie. This counts Original Medicare only and measures volume, not quality.
- What is John Paul Iii McKenzie's NPI number?
- 1366422685. 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 John Paul Iii McKenzie, 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 | 2,509 |
|---|---|
| Services billed to Medicare | 11,178 |
| Different services or procedures | 94 |
| Participating Medicare provider | Yes |
| Average age of these patients | 77 |
Most frequent services
- Evaluation of implantable heart and blood vessel monitoring system, remote up to 30 days (93297)1,440 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)1,391 services
- Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)1,268 services
- Evaluation of single, dual, multiple lead or leadless pacemaker system, remote up to 90 days (93294)848 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)791 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%
- Arthritis75%
- Ischemic heart disease75%
- Diabetes73%
- Heart failure53%
Hospitals where John Paul Iii McKenzie works
Medicare's Facility Affiliation Data lists John Paul Iii McKenzie 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.
- Adventist Health White MemorialLos Angeles, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: not listed by Medicare · CCN 050103
- Glendale Adventist Medical CenterGlendale, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050239
- Glendale Memorial Hospital & Health CenterGlendale, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050058
- Hollywood Presbyterian Medical CenterLos Angeles, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050063
- USC Verdugo Hills HospitalGlendale, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050124
Practice locations
Addresses where John Paul Iii McKenzie is enrolled with Medicare (CMS data updated October 2, 2026).
- 17543 Chatsworth St, Suite 103Granada Hills, CA 91344 (818) 617‑9799
- 4157 Eagle Rock Blvd, Suite 4Los Angeles, CA 90065 (818) 439‑2021
- 660 W BroadwayGlendale, CA 91204 (818) 243‑9600
- 701 N Alvarado St, Fl 1Los Angeles, CA 90026 (213) 277‑1451
Group practices
Medicare enrollment lists John Paul Iii McKenzie as a member of these groups (CMS data updated October 2, 2026).
- Heartbeat Cardiovascular Medical Group9 clinicians in the group
- Eagle Rock Medlink Group Inc3 clinicians in the group
Specialties
Other internal medicine doctors in Granada Hills
Clinicians with the same Medicare primary specialty in Granada Hills, CA — not a recommendation.
Other clinicians in Heartbeat Cardiovascular Medical Group
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Missouri, Columbia School Of Medicine |
| Graduation year | 1988 (38 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1366422685 |
| 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