DR. INESSA M GELFAND M.D.
NPI 1528080637
Internal Medicine - Endocrinology, Diabetes & Metabolism in Buffalo Grove, IL

Q: What is Inessa Gelfand's NPI number?

The NPI number for Inessa Gelfand is 1528080637. It was assigned to this individual provider in the NPPES registry on July 25, 2006.

Q: What is Inessa Gelfand's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.

Q: When was this NPI record last updated?

The NPPES record for Inessa Gelfand was last updated on July 17, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since July 25, 2006PECOS EnrolledAccepts Medicare Assignment

150 W HALF DAY RD STE 202, BUFFALO GROVE, IL 60089(630) 566-9565(630) 566-9565 Get Directions Write a Review

NPPES record last updated: July 17, 2026. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Jul 17, 2026, Feb 26, 2020 (2 updates tracked since 2020).

On this page

About Dr. Inessa M Gelfand M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. INESSA M GELFAND M.D. (NPI 1528080637) is an individual endocrinology, diabetes & metabolism provider in Buffalo Grove, Illinois, licensed in Illinois (036-115321) and active in the NPI registry since July 2006. She is enrolled in Medicare PECOS, is affiliated with Northshore University Healthsystem - Evanston Hospital, and is a graduate of Rush Medical College Of Rush University (1998).

NPPES Registry Identity

NPI1528080637

Entity TypeIndividualFemale

Primary Taxonomy207RE0101X

Provider Legal NameDR. INESSA M GELFANDCredential: M.D.

Location Address150 W HALF DAY RD STE 202Buffalo Grove, IL 60089-6591

Mailing Address150 W Half Day Rd Ste 202Buffalo Grove, IL 60089-6591 · (630) 566-9565 · Fax (630) 566-9565

Phone(630) 566-9565

Fax(630) 566-9565

Sole ProprietorNo

Medical School CMSRush Medical College Of Rush UniversityGraduated 1998

Enumeration DateJuly 25, 2006

Last NPPES UpdateJuly 17, 20262 updates tracked since enumeration

NPPES CertifiedJuly 17, 2026

✔ NPI 1528080637 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Endocrinology, Diabetes & MetabolismAllopathic & Osteopathic Physicians

Taxonomy Code207RE0101X

License✔ Licensed in IL · 036-115321

Definition

An internist who concentrates on disorders of the internal (endocrine) glands such as the thyroid and adrenal glands. This specialist also deals with disorders such as diabetes, metabolic and nutritional disorders, obesity, pituitary diseases and menstrual and sexual problems.

150 W HALF DAY RD STE 202, Buffalo Grove, IL 60089

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Other Identifiers 1

Medicaid036-115321IL

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Inessa M Gelfand M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID1355345406

PECOS Enrollment IDI20060905000259

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show Inessa Gelfand reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Img Endocrinology PLLC

0.1 mi

Endocrinology, Diabetes & Metabolism

150 W HALF DAY RD STE 202
Buffalo Grove, IL 60089

Reassigned Medicare billing, Illinois enrollment

NPI 1629881495 (224) 586-7533

Tsinman P.C.

4.3 mi

Internal Medicine

264 PRAIRIE VIEW LN
Wheeling, IL 60090

Reassigned Medicare billing, Illinois enrollment
2 clinicians in this Medicare group

NPI 1679779581 (847) 962-7881

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 20

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

1,563 services541 patients

Injection, denosumab, 1 mg J0897

Denosumab is a medication given via injection to strengthen your bones. It works by slowing down the cells that break down bone, improving bone density and reducing the risk of fractures. It's often used for osteoporosis treatment.

625 services35 patients

Continuous monitoring of blood sugar level in tissue fluid using sensor under skin with interpretation and report 95251

This procedure involves placing a small sensor under your skin to continuously monitor your blood sugar levels in tissue fluid. The data is interpreted and a report is generated to help manage your diabetes more effectively.

319 services108 patients

Insertion of needle into vein for collection of blood sample 36415

This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.

209 services183 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

157 services119 patients

Thyroxine (thyroid chemical), free 84439

The Thyroxine (thyroid chemical), free test is a blood test that measures the level of free T4 in your body. T4 is a hormone produced by your thyroid gland and is essential for growth and metabolism. If your T4 levels are too high or too low, it could indicate a thyroid disorder.

154 services145 patients

Blood test, thyroid stimulating hormone (tsh) 84443

A TSH blood test measures the level of thyroid stimulating hormone in your body. This hormone is produced by the pituitary gland and regulates how your thyroid works. It's a simple procedure where a small amount of blood is drawn from your arm for analysis.

153 services144 patients

Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count 85025

A Complete Blood Cell Count is a common test that measures various components of the blood, including red cells (carry oxygen), white cells (fight infection), and platelets (help blood clot). An automated test ensures accuracy. The differential count provides detailed information about white cell types.

136 services129 patients

Therapy procedure using exercise to develop strength, endurance, range of motion, and flexibility, each 15 minutes 97110

This therapy involves exercises to boost strength, endurance, flexibility, and range of motion. Each session lasts 15 minutes. The goal is to improve physical function and overall health. It's a safe, beneficial method for enhancing well-being and fitness.

125 services23 patients

Hemoglobin a1c level 83036

Hemoglobin A1c (HbA1c) is a test that measures your average blood sugar level over the past 2-3 months. It's used to monitor how well diabetes is being controlled. High levels may indicate that your diabetes treatment plan needs adjustment.

110 services104 patients

Blood test, lipids (cholesterol and triglycerides) 80061

A lipid panel is a blood test that measures fats and fatty substances, such as cholesterol and triglycerides. These substances are used by your body as a source of energy. High levels can lead to health issues, including heart disease.

90 services87 patients

Therapy procedure using manual technique, each 15 minutes 97140

This therapy involves using hands-on techniques to help improve your body's movement and function. These techniques may include stretching, resistance exercises, or gentle pressure. Each session lasts 15 minutes and aims to relieve pain, promote healing, and improve your overall health.

83 services22 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

63 services63 patients

Injection of drug or substance under skin or into muscle 96372

This procedure involves administering medication directly under the skin or into a muscle. A small needle is used to inject the drug, allowing it to be absorbed quickly into the bloodstream. It's a common method for delivering a variety of medications.

58 services56 patients

Therapy procedure to re-educate brain-to-nerve-to-muscle function, each 15 minutes 97112

This therapy helps retrain your brain, nerves, and muscles to work together. Through targeted exercises, your body learns to regain lost functions or improve current abilities. Each session lasts 15 minutes.

41 services21 patients

Application of ultrasound, each 15 minutes 97035

Ultrasound is a medical procedure that uses high-frequency sound waves to capture live images from inside your body. It's a painless process typically lasting 15 minutes per session. This method aids in diagnosing conditions and monitoring health without any radiation exposure.

39 services19 patients

Ultrasound scan of head and neck soft tissue 76536

An ultrasound scan of the head and neck soft tissue is a non-invasive procedure that uses sound waves to create images of the soft tissues in these areas. It helps identify any abnormalities or issues, such as tumors, cysts, or infections. It's painless and doesn't involve radiation.

34 services31 patients

Administration of non-hormonal anti-neoplastic chemotherapy under skin or into muscle 96401

This procedure involves giving anti-cancer drugs, which don't contain hormones, into the muscle or under the skin. These drugs help to stop the growth of cancer cells. The process is usually quick and done by a healthcare professional.

32 services30 patients

Electrical stimulation (unattended), to one or more areas for indication(s) other than wound care, as part of a therapy plan of care G0283

Electrical stimulation is a therapy method where mild electrical pulses are used to treat pain or stimulate muscles in certain areas. It's not for wound care but is part of a broader therapy plan. It's safe, non-invasive, and can help improve overall health.

31 services14 patients

Continuous monitoring of blood sugar level in tissue fluid using sensor under skin 95249

Continuous monitoring of blood sugar involves a small sensor inserted under the skin. This sensor measures glucose levels in tissue fluid throughout the day and night, providing real-time readings. It aids in managing diabetes effectively.

30 services28 patients

Hospital Affiliations CMS Care Compare 5

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Northshore University Healthsystem - Evanston Hospital

Acute Care Hospitals · Evanston, IL

5/5 CMS rating

OwnershipVoluntary non-profit - Other

CMS Certification Number140010

Location2650 Ridge AveEvanston, IL 60201 · Cook County

Emergency services Birthing friendly

Northwestern Lake Forest Hospital

Acute Care Hospitals · Lake Forest, IL

5/5 CMS rating

OwnershipVoluntary non-profit - Other

CMS Certification Number140130

Location1000 N Westmoreland RoadLake Forest, IL 60045 · Lake County

Emergency services Birthing friendly

Advocate Condell Medical Center

Acute Care Hospitals · Libertyville, IL

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number140202

Location801 S Milwaukee AveLibertyville, IL 60048 · Lake County

Emergency services Birthing friendly

Northwest Community Hospital 1

Acute Care Hospitals · Arlington Heights, IL

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number140252

Location800 W Central RoadArlington Heights, IL 60005 · Cook County

Emergency services Birthing friendly

Advocate Good Shepherd Hospital

Acute Care Hospitals · Barrington, IL

4/5 CMS rating

OwnershipVoluntary non-profit - Church

CMS Certification Number140291

Location450 West Highway 22Barrington, IL 60010 · Lake County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60089 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$137.43 typical visit price

range $59.81 – $181.38

Typical copayment $34.35 (range $14.95 – $45.34)

Most-billed visit code 99204

Established Patient

$105.07 typical visit price

range $19.15 – $147.12

Typical copayment $26.26 (range $4.78 – $36.78)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

Reported Quality Measures

Breast Cancer Screening

Percentage of women 50-74 years of age who had a mammogram to screen for breast cancer

3%314 patients1/55-star benchmark: 92%

Cervical Cancer Screening

Percentage of women 21-64 years of age who were screened for cervical cancer using either of the following criteria: - Women age 21-64 who had cervical cytology performed every 3 years - Women age 30-64 who had cervical cytology/human papillomavirus (HPV)…

0%239 patients

Colorectal Cancer Screening

Percentage of adults 50-75 years of age who had appropriate screening for colorectal cancer

19%557 patients1/55-star benchmark: 85%

Diabetes: Medical Attention for Nephropathy

The percentage of patients 18-75 years of age with diabetes who had a nephropathy screening test or evidence of nephropathy during the measurement period

74%139 patients3/55-star benchmark: 99%

Documentation of Current Medications in the Medical Record

Percentage of visits for patients aged 18 years and older for which the eligible professional or eligible clinician attests to documenting a list of current medications using all immediate resources available on the date of the encounter.

15%3,727 patients1/55-star benchmark: 100%

Pneumococcal Vaccination Status for Older Adults

Percentage of patients 65 years of age and older who have ever received a pneumococcal vaccine

14%692 patients1/55-star benchmark: 90%

Preventive Care and Screening: Body Mass Index (BMI) Screening and Follow-Up Plan

Percentage of patients aged 18 years and older with a BMI documented during the current encounter or during the previous twelve months AND with a BMI outside of normal parameters, a follow-up plan is documented during the encounter or during the previous…

18%1,124 patients1/55-star benchmark: 97%

Preventive Care and Screening: Influenza Immunization

Percentage of patients aged 6 months and older seen for a visit between October 1 and March 31 who received an influenza immunization OR who reported previous receipt of an influenza immunization

17%898 patients1/55-star benchmark: 88%

Use of High-Risk Medications in the Elderly

Percentage of patients 65 years of age and older who were ordered high-risk medications. Two rates are submitted. 1) Percentage of patients who were ordered at least one high-risk medication.

Lower rates are better for this measure.

Patients 2+: 1% · 692 patients

2%692 patients4/55-star benchmark: 100%

Weight Assessment and Counseling for Nutrition and Physical Activity for Children and Adolescents

Percentage of patients 3-17 years of age who had an outpatient visit with a Primary Care Physician (PCP) or Obstetrician/Gynecologist (OB/GYN) and who had evidence of the following during the measurement period. Three rates are reported.

Patients nutrition: 37% · 30 patients

93%30 patients

Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

Referred Medical Equipment & Supplies CMS DME claims 7

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253

DME-Other DME · category DE017N

51 suppliers318 claims998 services$5.42 avg. paid by Medicare

Lancets, per box of 100 A4259

DME-Medical/Surgical Supplies · category DA000N

42 suppliers228 claims373 services$0.95 avg. paid by Medicare

For diabetics only, fitting (including follow-up), custom preparation and supply of off-the-shelf depth-inlay shoe manufactured to accommodate multi-density insert(s), per shoe A5500

DME-Orthotic Devices · category DF000N

6 suppliers17 claims34 services$58.22 avg. paid by Medicare

For diabetics only, multiple density insert, direct formed, molded to foot after external heat source of 230 degrees fahrenheit or higher, total contact with patient's foot, including arch, base layer minimum of 1/4 inch material of shore a 35 durometer or 3/16 inch material of shore a 40 durometer (or higher), prefabricated, each A5512

DME-Orthotic Devices · category DF000N

6 suppliers17 claims102 services$24.28 avg. paid by Medicare

Home blood glucose monitor E0607

DME-Other DME · category DE017N

12 suppliers15 claims15 services$29.91 avg. paid by Medicare

Supply allowance for therapeutic continuous glucose monitor (cgm), includes all supplies and accessories, 1 month supply = 1 unit of service K0553

DME-Other DME · category DE017N

17 suppliers287 claims297 services$186.19 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

IMG ENDOCRINOLOGY PLLC

Internal Medicine (Endocrinology, Diabetes & Metabolism)

150 W HALF DAY RD STE 202
BUFFALO GROVE, IL 60089

Lake County (224) 586-7533

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Inessa Gelfand's NPI number?

The NPI number for Inessa Gelfand is 1528080637. It was assigned to this individual provider in the NPPES registry on July 25, 2006.

Where is Inessa Gelfand located?

Inessa Gelfand practices at 150 W Half Day Rd Ste 202, Buffalo Grove, IL 60089. The listed phone number is (630) 566-9565.

What is Inessa Gelfand's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.

Is Inessa Gelfand enrolled in Medicare?

Yes. Inessa Gelfand is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Inessa Gelfand's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Inessa Gelfand reassigns Medicare benefits to 2 organizations: Img Endocrinology PLLC (Buffalo Grove, IL) and Tsinman P.C. (Wheeling, IL). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Inessa Gelfand's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Inessa Gelfand affiliated with any hospitals?

According to CMS data, Inessa Gelfand is affiliated with Northshore University Healthsystem - Evanston Hospital, Northwestern Lake Forest Hospital, Advocate Condell Medical Center, Northwest Community Hospital 1 and Advocate Good Shepherd Hospital.

When was this NPI record last updated?

The NPPES record for Inessa Gelfand was last updated on July 17, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.