Quick answers
- Does John A. Heywood accept Medicare assignment?
- Yes. Medicare's clinician data says John A. Heywood 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 A. Heywood see?
- In 2024, CMS data shows 911 Original Medicare patients and 3,204 services for John A. Heywood. This counts Original Medicare only and measures volume, not quality.
- What is John A. Heywood's NPI number?
- 1871513341. 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 A. Heywood, 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 | 911 |
|---|---|
| Services billed to Medicare | 3,204 |
| Different services or procedures | 68 |
| Participating Medicare provider | Yes |
| Average age of these patients | 80 |
Most frequent services
- Evaluation of single, dual, multiple lead or leadless pacemaker system, remote up to 90 days (93294)482 services
- Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)425 services
- Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)392 services
- Evaluation of single, dual, or multiple lead implantable defibrillator system, remote up to 90 days (93295)337 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)310 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%
- Atrial fibrillation59%
- Arthritis47%
- Ischemic heart disease42%
- Heart failure38%
Hospitals where John A. Heywood works
Medicare's Facility Affiliation Data lists John A. Heywood 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.
- Overlake Hospital Medical Center & ClinicsBellevue, WA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 500051
Practice locations
Addresses where John A. Heywood is enrolled with Medicare (CMS data updated October 2, 2026).
- 1035 116th Ave NEBellevue, WA 98004 (425) 688‑5072
- 1135 116th Ave NE, Suite 600Bellevue, WA 98004 (425) 454‑2656
- 1740 NW Maple StIssaquah, WA 98027
- 1750 112th Ave NE, Suite B102Bellevue, WA 98004 (425) 688‑5460
Group practices
Medicare enrollment lists John A. Heywood as a member of this group (CMS data updated October 2, 2026).
- Overlake Medical Clinics LLC425 clinicians in the group
Specialties
- Cardiac Electrophysiologyprimary
- Internal Medicinealso
Find other Cardiac Electrophysiology doctors in Washington →
Other cardiac electrophysiologists in Bellevue
Clinicians with the same Medicare primary specialty in Bellevue, WA — not a recommendation.
Other clinicians in Overlake Medical Clinics LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Washington School Of Medicine |
| Graduation year | 1989 (37 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1871513341 |
| 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