NPIMap

Individual provider Active NPI

Inessa M Gelfand, M.D.

  • Endocrinology, Diabetes & Metabolism Physician
  • Buffalo Grove, IL
National Provider Identifier
1528080637
Registry record updated Jul 17, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Endocrinology, Diabetes & Metabolism PhysicianTaxonomy code 207RE0101X
License
036-115321 Issued in IL
Practice address
150 W Half Day Rd Ste 202
Buffalo Grove, IL 60089-6591
Phone
(630) 566-9565
Fax
(630) 566-9565
NPI assigned
Jul 25, 2006
Last updated
Jul 17, 2026By the provider in NPPES
Sex
Female
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Jul 17, 2026

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Endocrinology, Diabetes & Metabolism Physician 207RE0101X 036-115321 IL Primary

Addresses

Primary practice location

150 W Half Day Rd Ste 202
Buffalo Grove, IL 60089-6591

Mailing address

150 W Half Day Rd Ste 202
Buffalo Grove, IL 60089-6591
Phone (630) 566-9565

Other identifiers 1

IdentifierTypeStateIssuer
036-115321MedicaidIL

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in IL
Eligible to order & refer
  • Part B services
  • Medical equipment
  • Home health
  • Power mobility devices
  • Hospice
Green means eligible to order or refer.

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20060905000259 IL Practitioner - EndocrinologyPractitioner - Internal Medicine 1355345406 Reassigns benefits to 2 organizations

Care Compare profile

Medicare Care Compare
Specialty
EndocrinologyAlso: Internal Medicine
Education
Rush Medical College of Rush University, 1998
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Telehealth
Offers telehealth services
Group practices
Tsinman P.C.Group PAC ID 5890896005, 2 clinicians

Practice addresses (Care Compare)

150 W Half Day Rd
Suite 202
Buffalo Grove, IL 60089-6591
Phone (630) 566-9565

20570 N Milwaukee Ave
Deerfield, IL 60015-3693
Phone (847) 215-9200

Hospital & facility affiliations

Merit-based Incentive Payment System (MIPS)

Final score
24.36 of 100Reported as individual
Quality
0
Promoting interoperability
0
Improvement activities
0
Cost
81.2

Merit-based Incentive Payment System (MIPS)

Final score
27.57 of 100Reported as individual
Quality
0
Improvement activities
0
Cost
91.89

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Medicine

State licenses

LicenseStateTypeSpecialty
036-115321ILMDEndocrinology, Diabetes & Metabolism Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Tsinman P.C. CurrentSince May 6, 2024 Accepting new patients
Img Endocrinology PLLC Endocrinology, Diabetes & Metabolism CurrentSince Apr 22, 2025 Accepting new patients
Injurycare Limited PastSince Jul 7, 2024 Accepting new patients
Hias Diagnostics Inc Past Accepting new patients
Major Hospital Past Accepting new patients

Locations

150 W Half Day Rd
Ste 202
Buffalo Grove, IL 60089
Phone (630) 566-9565

20570 Milwaukee Ave
Deerfield, IL 60015
Phone (847) 215-9200

Organizations & group practices 5

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

Hospital & facility affiliations 9

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

NPI Registry JSON

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1153785600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1784246400000",
    "number": "1528080637",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "150 W HALF DAY RD STE 202",
            "city": "BUFFALO GROVE",
            "state": "IL",
            "postal_code": "600896591",
            "telephone_number": "630-566-9565",
            "fax_number": "630-566-9565"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "150 W HALF DAY RD STE 202",
            "city": "BUFFALO GROVE",
            "state": "IL",
            "postal_code": "600896591",
            "telephone_number": "630-566-9565",
            "fax_number": "630-566-9565"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "GELFAND",
        "first_name": "INESSA",
        "middle_name": "M",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2006-07-25",
        "last_updated": "2026-07-17",
        "certification_date": "2026-07-17",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RE0101X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Endocrinology, Diabetes & Metabolism",
            "state": "IL",
            "license": "036-115321",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "036-115321",
            "state": "IL"
        }
    ],
    "endpoints": [],
    "other_names": []
}

Other providers in Buffalo Grove, IL

Sources for this page

Verify at the official NPI Registry.