Harjyot Chahal, M.D.
Endocrinology, Diabetes & Metabolism Physician · Vernon Hills, IL
Harjyot Chahal, M.D. is an endocrinology, diabetes & metabolism physician with a practice address in Vernon Hills, Illinois, and NPI 1306160247, issued on Mar 22, 2010. Check the license (Illinois 036124980, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Harjyot Chahal
- Credential
- M.D.
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License numbers
- 036124980 IL
036.124980 IL
Self-reported in NPPES; status is on the state search - Practice location
- 870 N Milwaukee Ave FL 2, Vernon Hills, IL 60061
- Phone
- (847) 535-7647
- Enumerated
- Mar 22, 2010
- Record last updated
- Oct 16, 2025
- Fax
- (847) 535-8109
- Medicare enrollment
- Enrolled (PECOS I20101215000734); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 436 in Illinois → Look up another NPI →
Also registered at 870 N Milwaukee Ave FL 2
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Neal Shah, M.D.Internal Medicine Physician1801258561
- Steven Witzel, MDInternal Medicine Physician1922064641
- Brigit Zielinski, APRN, CNPNurse Practitioner1104674969
Verify Harjyot Chahal in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 036124980Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
18% fewer Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
2,168 Medicare Part D claims for 293 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 60% of claims.
Most prescribed
- Ozempic237 claims
- Levothyroxine Sodium212 claims
- Jardiance161 claims
- Metformin Hcl Er139 claims
- Mounjaro122 claims
- Alendronate Sodium115 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $70.23
2 payments; by number, the most common kind was food and beverage; the largest payer was Dexcom, Inc. The 5,661 providers of this specialty with any payment received $5,742.15 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Northwestern Medical Faculty FoundationLake Forest, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Harjyot Chahal among 436 endocrinology, diabetes & metabolism physician records in Illinois
Harjyot Chahal, M.D. is one of 436 endocrinology, diabetes & metabolism physician records with a practice address in Illinois. 85% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 60% of them.
- NPI issued2010 · 60% of these records are older, 38% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated2003 · median 2006 among the 295 with a school on file
- Record last updated2025 · 46% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in Illinois
There are 436 endocrinology, diabetes & metabolism physician records in Illinois.
All 436 in Illinois → Every provider in Vernon Hills → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Alvia Moid, DONorth Chicago, IL 600641023064508
- Sant Singh, M.D.North Chicago, IL 600641689682114
- Victoria Ryvkin, M.D.Mt Prospect, IL 600561881815173
- Adil Alavi, M.D.Park Ridge, IL 600681649215161
- Lawrence Domont, M.D.Park Ridge, IL 600681043256910
- Shuyang Fang, MD, MPHPark Ridge, IL 600681134582497
- Nishat Fatima, MDPark Ridge, IL 600681760898936
- Irfan Khan, D.O.Park Ridge, IL 600681659807709
Common questions
What is Harjyot Chahal, M.D.'s NPI number?
Harjyot Chahal, M.D.'s National Provider Identifier (NPI) is 1306160247, issued on Mar 22, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Harjyot Chahal, M.D. located?
The NPPES record lists a practice address at 870 N Milwaukee Ave FL 2, Vernon Hills, IL, 60061. Phone: (847) 535-7647. Providers update this record themselves, so call before visiting.
How can I verify Harjyot Chahal, M.D.'s license?
NPPES lists Illinois license number 036124980, as entered by the provider. Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Harjyot Chahal, M.D. prescribe under Medicare Part D?
In 2024, Harjyot Chahal, M.D. had 2,168 Medicare Part D claims for 293 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.