Quick answers
- Does John D. Herlihy Iv accept Medicare assignment?
- Yes. Medicare's clinician data says John D. Herlihy Iv 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 John D. Herlihy Iv see?
- In 2024, CMS data shows 90 Original Medicare patients and 777 services for John D. Herlihy Iv. This counts Original Medicare only and measures volume, not quality.
- What is John D. Herlihy Iv's NPI number?
- 1245625151. 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 John D. Herlihy Iv, 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 | 90 |
|---|---|
| Services billed to Medicare | 777 |
| Different services or procedures | 45 |
| Participating Medicare provider | Yes |
| Average age of these patients | 64 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)114 services
- Insertion of needle into vein for collection of blood sample (36415)34 services
- Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)20 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)19 services
- Biopsy of large bowel using a flexible endoscope (45380)18 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%
- High blood pressure62%
- Anxiety37%
- Depression31%
- Diabetes30%
- Arthritis27%
Hospitals where John D. Herlihy Iv works
Medicare's Facility Affiliation Data lists John D. Herlihy Iv 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.
- Mercy Medical Center - Cedar RapidsCedar Rapids, IA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 160079
Practice locations
Addresses where John D. Herlihy Iv is enrolled with Medicare (CMS data updated October 2, 2026).
- 1765 Lininger Ln, Suite 1North Liberty, IA 52317 (319) 665‑3053
- 600 7th St SE, 101 Care Connections Clinic at MercyCedar Rapids, IA 52401 (319) 398‑6860
- 701 10th St SECedar Rapids, IA 52403
- 701 10th St SE J Edward Lundy, Mercy Pediatric ClinicCedar Rapids, IA 52403 (319) 832‑2328
Group practices
Medicare enrollment lists John D. Herlihy Iv as a member of this group (CMS data updated October 2, 2026).
- Mercy Medical Center305 clinicians in the group
Specialties
- Gastroenterologyprimary
Other gastroenterologists in Iowa
Clinicians with the same Medicare primary specialty in Iowa — not a recommendation.
Other clinicians in Mercy Medical Center
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Texas Medical School At San Antonio |
| Graduation year | 2015 (11 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1245625151 |
| 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