Quick answers
- Does Chadwick F. Haarer accept Medicare assignment?
- Yes. Medicare's clinician data says Chadwick F. Haarer 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 Chadwick F. Haarer see?
- In 2024, CMS data shows 900 Original Medicare patients and 2,840 services for Chadwick F. Haarer. This counts Original Medicare only and measures volume, not quality.
- What is Chadwick F. Haarer's NPI number?
- 1336321306. 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 Chadwick F. Haarer, 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 | 900 |
|---|---|
| Services billed to Medicare | 2,840 |
| Different services or procedures | 30 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Pathology examination of tissue using a microscope, intermediate complexity (88305)957 services
- Special stained specimen slides to examine tissue, each additional procedure (88341)443 services
- Special stained specimen slides to examine tissue, initial procedure (88342)243 services
- Pathology examination of tissue using a microscope, moderately high complexity (88307)173 services
- Cell examination of specimen, selective cellular enhancement technique (88112)135 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%
- Arthritis57%
- Chronic kidney disease41%
- Ischemic heart disease39%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)33%
Hospitals where Chadwick F. Haarer works
Medicare's Facility Affiliation Data lists Chadwick F. Haarer 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.
- Banner Boswell Medical CenterSun City, AZ · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 030061
- Banner del E. Webb Medical CenterSun City West, AZ · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 030093
- Honor Health John C. Lincoln Medical CenterPhoenix, AZ · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 030014
- St Josephs Hospital and Medical CenterPhoenix, AZ · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 030024
Practice locations
Addresses where Chadwick F. Haarer is enrolled with Medicare (CMS data updated October 2, 2026).
- 10401 W Thunderbird BlvdSun City, AZ 85351 (602) 685‑5211
- 1400 S Dobson RdMesa, AZ 85202 (602) 685‑5211
- 14502 W Meeker BlvdSun City, AZ 85375 (602) 685‑5211
- 350 W Thomas RdPhoenix, AZ 85013 (602) 406‑3000
Group practices
Medicare enrollment lists Chadwick F. Haarer as a member of these groups (CMS data updated October 2, 2026).
- Pathology Specialist of Arizona, LLP71 clinicians in the group
- St Josephs Pathology13 clinicians in the group
Specialties
- Pathologyprimary
Other pathologists in Sun City
Clinicians with the same Medicare primary specialty in Sun City, AZ — not a recommendation.
Other clinicians in Pathology Specialist of Arizona, LLP
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | New York Medical College |
| Graduation year | 2001 (25 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1336321306 |
| 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