Quick answers
- Does Adam L. Herrick accept Medicare assignment?
- Yes. Medicare's clinician data says Adam L. Herrick 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 Adam L. Herrick see?
- In 2024, CMS data shows 446 Original Medicare patients and 523 services for Adam L. Herrick. This counts Original Medicare only and measures volume, not quality.
- What is Adam L. Herrick's NPI number?
- 1841711777. 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 Adam L. Herrick, 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 | 446 |
|---|---|
| Services billed to Medicare | 523 |
| Different services or procedures | 19 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Emergency department visit with high level of medical decision making (99285)335 services
- Emergency department visit with moderate level of medical decision making (99284)103 services
- Emergency department visit with low level of medical decision making (99283)29 services
- Critical care, first 30-74 minutes (99291)19 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%
- Arthritis54%
- Depression44%
- Ischemic heart disease42%
- Heart failure42%
Hospitals where Adam L. Herrick works
Medicare's Facility Affiliation Data lists Adam L. Herrick 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 North Iowa Medical CenterMason City, IA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 160064
Practice locations
Addresses where Adam L. Herrick is enrolled with Medicare (CMS data updated October 2, 2026).
- 1000 4th St SWMason City, IA 50401
Group practices
Medicare enrollment lists Adam L. Herrick as a member of this group (CMS data updated October 2, 2026).
- North Iowa Mercy Clinics302 clinicians in the group
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in Iowa
Clinicians with the same Medicare primary specialty in Iowa — not a recommendation.
Other clinicians in North Iowa Mercy Clinics
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Kansas City University Of Physicians And Surgeons |
| Graduation year | 2017 (9 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1841711777 |
| 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