Quick answers
- Does Inessa M. Gelfand accept Medicare assignment?
- Yes. Medicare's clinician data says Inessa M. Gelfand 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 Inessa M. Gelfand see?
- In 2024, CMS data shows 596 Original Medicare patients and 4,560 services for Inessa M. Gelfand. This counts Original Medicare only and measures volume, not quality.
- What is Inessa M. Gelfand's NPI number?
- 1528080637. 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 Inessa M. Gelfand, 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 | 596 |
|---|---|
| Services billed to Medicare | 4,560 |
| Different services or procedures | 44 |
| Participating Medicare provider | Yes |
| Average age of these patients | 77 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)1,563 services
- Injection, denosumab, 1 mg (J0897)625 services
- Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)468 services
- Continuous monitoring of blood sugar level in tissue fluid using sensor under skin with interpretation and report (95251)319 services
- Insertion of needle into vein for collection of blood sample (36415)209 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%
- Arthritis74%
- Ischemic heart disease45%
- Depression39%
Hospitals where Inessa M. Gelfand works
Medicare's Facility Affiliation Data lists Inessa M. Gelfand 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 Condell Medical CenterLibertyville, IL · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 140202
- Advocate Good Shepherd HospitalBarrington, IL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 140291
- Northshore University Healthsystem - Evanston HospitalEvanston, IL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 140010
- Northwest Community Hospital 1Arlington Heights, IL · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 140252
- Northwestern Lake Forest HospitalLake Forest, IL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 140130
Practice locations
Addresses where Inessa M. Gelfand is enrolled with Medicare (CMS data updated October 2, 2026).
- 150 W Half Day Rd, Suite 202Buffalo Grove, IL 60089 (630) 566‑9565
- 20570 N Milwaukee AveDeerfield, IL 60015 (847) 215‑9200
Group practices
Medicare enrollment lists Inessa M. Gelfand as a member of this group (CMS data updated October 2, 2026).
- Tsinman P.C.2 clinicians in the group
Specialties
- Endocrinologyprimary
- Internal Medicinealso
Other endocrinologists in Illinois
Clinicians with the same Medicare primary specialty in Illinois — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Rush Medical College Of Rush University |
| Graduation year | 1998 (28 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1528080637 |
| 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