Quick answers
- Does Tristan J. McKenna accept Medicare assignment?
- Yes. Medicare's clinician data says Tristan J. McKenna 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 Tristan J. McKenna see?
- In 2024, CMS data shows 286 Original Medicare patients and 1,850 services for Tristan J. McKenna. This counts Original Medicare only and measures volume, not quality.
- What is Tristan J. McKenna's NPI number?
- 1417304403. 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 Tristan J. McKenna, 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 | 286 |
|---|---|
| Services billed to Medicare | 1,850 |
| Different services or procedures | 50 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)544 services
- Insertion of needle into vein for collection of blood sample (36415)217 services
- Complete blood cell count (red cells, white blood cell, platelets), automated test (85027)189 services
- Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)150 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)114 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 cholesterol70%
- High blood pressure60%
- Arthritis31%
- Diabetes21%
- Ischemic heart disease21%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)17%
Hospitals where Tristan J. McKenna works
Medicare's Facility Affiliation Data lists Tristan J. McKenna 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.
- MercyOne Des Moines Medical CenterDes Moines, IA · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 160083
- 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 Tristan J. McKenna is enrolled with Medicare (CMS data updated October 2, 2026).
- 2605 SW White Birch Dr, Mercyone Ankeny Prairie Trail Family MediciAnkeny, IA 50023 (515) 643‑7100
- 2605 SW White Birch Dr, Mercyone S Des Moines Behavioral Health CarAnkeny, IA 50023 (515) 643‑8350
- 330 Laurel St, Suite 1200Des Moines, IA 50314
- 800 E 1st StAnkeny, IA 50021
Group practices
Medicare enrollment lists Tristan J. McKenna as a member of this group (CMS data updated October 2, 2026).
- Mercy Clinics Inc443 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Ankeny
Clinicians with the same Medicare primary specialty in Ankeny, IA — not a recommendation.
Other clinicians in Mercy Clinics Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Arizona College Of Osteopathic Medicine Mid Western University |
| Graduation year | 2018 (8 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1417304403 |
| 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