Quick answers
- Does James F. Koop accept Medicare assignment?
- Yes. Medicare's clinician data says James F. Koop 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 F. Koop see?
- In 2024, CMS data shows 345 Original Medicare patients and 2,244 services for James F. Koop. This counts Original Medicare only and measures volume, not quality.
- What is James F. Koop's NPI number?
- 1255420451. 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 F. Koop, 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 | 345 |
|---|---|
| Services billed to Medicare | 2,244 |
| Different services or procedures | 45 |
| Participating Medicare provider | Yes |
| Average age of these patients | 79 |
Most frequent services
- Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month (99490)339 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)286 services
- Insertion of needle into vein for collection of blood sample (36415)269 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)216 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)207 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%
- Arthritis47%
- Ischemic heart disease37%
- Diabetes35%
- Chronic kidney disease31%
Hospitals where James F. Koop works
Medicare's Facility Affiliation Data lists James F. Koop 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.
- Advocate Sherman HospitalElgin, IL · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 140030
- Loyola Gottlieb Memorial HospitalMelrose Park, IL · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 140008
- Loyola University Medical CenterMaywood, IL · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 140276
- Northwestern Medicine Central Dupage HospitalWinfield, IL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 140242
- Saint Joseph Hospital-ElginElgin, IL · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 140217
Practice locations
Addresses where James F. Koop is enrolled with Medicare (CMS data updated October 2, 2026).
- 2350 Royal Blvd, Suite 100Elgin, IL 60123 (847) 695‑8100
- 675 W N Ave, Suite 409Melrose Park, IL 60160 (708) 450‑5070
Group practices
Medicare enrollment lists James F. Koop as a member of this group (CMS data updated October 2, 2026).
- Elio M Vento MD and Associates SC8 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Elgin
Clinicians with the same Medicare primary specialty in Elgin, IL — not a recommendation.
Other clinicians in Elio M Vento MD and Associates SC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1991 (35 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1255420451 |
| 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