Quick answers
- Does Zachary G. Ries accept Medicare assignment?
- Yes. Medicare's clinician data says Zachary G. Ries 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 Zachary G. Ries see?
- In 2024, CMS data shows 370 Original Medicare patients and 1,616 services for Zachary G. Ries. This counts Original Medicare only and measures volume, not quality.
- What is Zachary G. Ries's NPI number?
- 1841558285. 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 Zachary G. Ries, 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 | 370 |
|---|---|
| Services billed to Medicare | 1,616 |
| Different services or procedures | 70 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- X-ray of lower and sacral spine, 2-3 views (72100)352 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)202 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)125 services
- Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more (99212)75 services
- Partial removal of spine bone with release of spinal cord and/or nerves, each additional segment (63048)74 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 cholesterol75%
- Arthritis75%
- High blood pressure74%
- Depression29%
- Diabetes25%
- Chronic kidney disease25%
Hospitals where Zachary G. Ries works
Medicare's Facility Affiliation Data lists Zachary G. Ries 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.
- Clarke County HospitalOsceola, IA · Critical Access Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 161348
- Knoxville Hospital & ClinicsKnoxville, IA · Critical Access Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 161355
- MercyOne Des Moines Medical CenterDes Moines, IA · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 160083
- St Anthony Regional Hospital & Nursing HomeCarroll, IA · Critical Access Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 161382
- UnityPoint Health - Des Moines Iowa Methodist MediDes Moines, IA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 160082
Practice locations
Addresses where Zachary G. Ries is enrolled with Medicare (CMS data updated October 2, 2026).
- 6001 Westown PkwyWest Des Moines, IA 50266 (515) 224‑1414
Group practices
Medicare enrollment lists Zachary G. Ries as a member of this group (CMS data updated October 2, 2026).
- Des Moines Orthopaedic Surgeons PC105 clinicians in the group
Specialties
- Thoracic Surgeryprimary
Other thoracic surgeons in Iowa
Clinicians with the same Medicare primary specialty in Iowa — not a recommendation.
Other clinicians in Des Moines Orthopaedic Surgeons PC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Iowa, Rj & L Carver College Of Medicine |
| Graduation year | 2012 (14 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1841558285 |
| 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