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Interventional Cardiology

James B. Hermiller Jr., MD

Works at hospitals in Indianapolis, IN · Danville, IN · Marion, IN … · Indiana

Summary

Dr. James B. Hermiller Jr., MD is an interventional cardiologist at 10580 N Meridian St, Carmel, IN 46290. Phone: (317) 583-5000. Accepts Medicare assignment. In 2024, James B. Hermiller Jr. had 699 Original Medicare patients and 1,542 services. NPI 1619943263. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

From official Medicare data

This page shows what Medicare's official clinician data says about James B. Hermiller Jr., joined by NPI number (data updated October 2, 2026). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

Quick answers

Does James B. Hermiller Jr. accept Medicare assignment?
Yes. Medicare's clinician data says James B. Hermiller Jr. 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 James B. Hermiller Jr. see?
In 2024, CMS data shows 699 Original Medicare patients and 1,542 services for James B. Hermiller Jr.. This counts Original Medicare only and measures volume, not quality.
What is James B. Hermiller Jr.'s NPI number?
1619943263. 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 James B. Hermiller Jr., 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 patients699
Services billed to Medicare1,542
Different services or procedures59
Participating Medicare providerYes
Average age of these patients78

Most frequent services

  1. Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)338 services
  2. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)299 services
  3. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)154 services
  4. Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes (99152)88 services
  5. New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)80 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%
  • Ischemic heart disease73%
  • Arthritis48%
  • Heart failure45%
  • Atrial fibrillation43%

Hospitals where James B. Hermiller Jr. works

Medicare's Facility Affiliation Data lists James B. Hermiller Jr. 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.

  • Ascension St Vincent HospitalIndianapolis, IN · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 150084
  • Hendricks Regional HealthDanville, IN · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 150005
  • Marion General HospitalMarion, IN · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 150011
  • Riverview HealthNoblesville, IN · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 150059
  • St Vincent Heart CenterCarmel, IN · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 150153

Practice locations

Addresses where James B. Hermiller Jr. is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 7; the Medicare profile lists all.

Group practices

Medicare enrollment lists James B. Hermiller Jr. as a member of this group (CMS data updated October 2, 2026).

  • St Vincent Medical Group Inc736 clinicians in the group

Specialties

Find other Interventional Cardiology doctors in Indiana →

Other interventional cardiologists in Carmel

Clinicians with the same Medicare primary specialty in Carmel, IN — not a recommendation.

All interventional cardiologists in Carmel →

Other clinicians in St Vincent Medical Group Inc

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

Clinician information

CredentialMD
Medical schoolOhio State University College Of Medicine
Graduation year1983 (43 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
TelehealthOffers telehealth services
NPI (National Provider Identifier)1619943263
CorrectionsReport 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

  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