Quick answers
- Does James G. Sisamis Ii accept Medicare assignment?
- Yes. Medicare's clinician data says James G. Sisamis Ii 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 G. Sisamis Ii see?
- In 2024, CMS data shows 48 Original Medicare patients and 63 services for James G. Sisamis Ii. This counts Original Medicare only and measures volume, not quality.
- What is James G. Sisamis Ii's NPI number?
- 1013971514. 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 G. Sisamis Ii, 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 | 48 |
|---|---|
| Services billed to Medicare | 63 |
| Different services or procedures | 28 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
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%
- Arthritis71%
- Anxiety40%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)35%
- Chronic kidney disease33%
Hospitals where James G. Sisamis Ii works
Medicare's Facility Affiliation Data lists James G. Sisamis Ii 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.
- Lakeland Hospital, St JosephSt Joseph, MI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 230021
Practice locations
Addresses where James G. Sisamis Ii is enrolled with Medicare (CMS data updated October 2, 2026).
- 1234 Napier Ave, Corewell Health Lakeland HospitalsSaint Joseph, MI 49085 (269) 983‑8300
Group practices
Medicare enrollment lists James G. Sisamis Ii as a member of this group (CMS data updated October 2, 2026).
- Lakeland Hospitals at Niles and St Joseph Inc131 clinicians in the group
Specialties
- Anesthesiologyprimary
Other anesthesiologists in Saint Joseph
Clinicians with the same Medicare primary specialty in Saint Joseph, MI — not a recommendation.
Other clinicians in Lakeland Hospitals at Niles and St Joseph Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Indiana University School Of Medicine |
| Graduation year | 1990 (36 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1013971514 |
| 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