Quick answers
- Does Sundar Sivaprakasam accept Medicare assignment?
- Yes. Medicare's clinician data says Sundar Sivaprakasam 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 Sundar Sivaprakasam see?
- In 2024, CMS data shows 174 Original Medicare patients and 3,329 services for Sundar Sivaprakasam. This counts Original Medicare only and measures volume, not quality.
- What is Sundar Sivaprakasam's NPI number?
- 1720063530. 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 Sundar Sivaprakasam, 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 | 174 |
|---|---|
| Services billed to Medicare | 3,329 |
| Different services or procedures | 28 |
| Participating Medicare provider | Yes |
| Average age of these patients | 78 |
Most frequent services
- Residence visit for established patient with high level of medical decision making, per day, if using time, at least 60 minutes (99350)740 services
- Complex chronic care management services for two or more chronic conditions, each additional 60 minutes of clinical staff time directed by health care professional, per calendar month (99489)554 services
- Education and training to self measure blood pressure (99473)383 services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)356 services
- Complex chronic care management services for two or more chronic conditions, first 60 minutes of clinical staff time directed by health care professional, per calendar month (99487)277 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%
- Diabetes75%
- Arthritis75%
- Ischemic heart disease48%
- Chronic kidney disease45%
Practice locations
Addresses where Sundar Sivaprakasam is enrolled with Medicare (CMS data updated October 2, 2026).
- 14489 John Humphrey DrOrland Park, IL 60462
Specialties
- Internal Medicineprimary
- Emergency Medicinealso
Other internal medicine doctors in Orland Park
Clinicians with the same Medicare primary specialty in Orland Park, IL — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1970 (56 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1720063530 |
| 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
- 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