Mary M. Dagen, MD

Medicare activity in 2024

Official CMS public-use data for Mary M. Dagen, 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.

Most frequent services

1. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)134 services
2. Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)45 services
3. New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)15 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 cholesterol74%
• High blood pressure68%
• Arthritis59%
• Depression45%
• Anxiety41%
• Diabetes27%

Hospitals where Mary M. Dagen works

Medicare's Facility Affiliation Data lists Mary M. Dagen 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.

• Spectrum HealthGrand Rapids, MI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 230038

Practice locations

Addresses where Mary M. Dagen is enrolled with Medicare (CMS data updated October 2, 2026).

• 15100 Whittaker WayGrand Haven, MI 49417 (616) 772‑4644
• 15100 Whittaker Way, Corewell Health Medical Group WestGrand Haven, MI 49417 (616) 935‑6280
• 4100 Lake Dr SEGrand Rapids, MI 49546
• 4444 Kalamazoo Ave SE, 200 Corewell Health Medical Group WestKentwood, MI 49508 (616) 391‑5600
• 8333 Felch StZeeland, MI 49464

Group practices

Medicare enrollment lists Mary M. Dagen as a member of this group (CMS data updated October 2, 2026).

• Spectrum Health Primary Care Partners2,294 clinicians in the group

Specialties

• Family Practiceprimary

Find other Family Practice doctors in Michigan →

Other family doctors in Grand Haven

Clinicians with the same Medicare primary specialty in Grand Haven, MI — not a recommendation.

• Benjermen A. Blackmer, DO
• Christopher J. Rogalla, DO
• Christopher J. Snyder, MD
• Kyle L. Snell, DO
• David K. Wilson, MD
• Calvin Tebbe, DO
• Luke Ragon, MD
• Kelliann Rawlinson, DO

All family doctors in Grand Haven →

Other clinicians in Spectrum Health Primary Care Partners

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

• Ann E. Chamberlain, NP
• Donald C. Fedrigon, MD
• Michael Udell
• Mark Choe, CNA
• Grace Langholz
• Maxwell M. McDonald

Clinician information

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

1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
6. Medicare Care Compare — official Medicare tool to look up clinicians