NPPES file of Aug 9, 2026

Mario Him Ming Chan, M.D.

Endocrinology, Diabetes & Metabolism Physician · Arlington Heights, IL

Mario Him Ming Chan, M.D. is an endocrinology, diabetes & metabolism physician with a practice address in Arlington Heights, Illinois, and NPI 1104975176, issued on Jan 9, 2007. Check the license (Illinois 036104346, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1104975176
Name
Mario Him Ming Chan
Credential
M.D.
Primary taxonomy
Endocrinology, Diabetes & Metabolism Physician 207RE0101X
License number
036104346 IL
Self-reported in NPPES; status is on the state search
Practice location
2101 S Arlington Heights RD, Arlington Heights, IL 60005
Phone
(847) 228-3200
Enumerated
Jan 9, 2007
Record last updated
Jun 11, 2012 (not updated in 14 years: call before relying on the address or phone)
Fax
(847) 228-3740
Medicare enrollment
Enrolled (PECOS I20101111000705); accepts Medicare assignment
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest endocrinology, diabetes & metabolism physician records → All 436 in Illinois → Look up another NPI →

Also registered at 2101 S Arlington Heights RD

A shared address usually means a shared clinic or building; it does not show who employs whom.

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  2. Vicky DelgadoClinical Social Worker1245985969
  3. Cesar Feijoo, PA-CPhysician Assistant1376233940
  4. Daniel Jonas, M.D.Gastroenterology Physician1720519598
  5. Lizbeth MancillaSocial Worker1730937129
  6. Paul Marsiglia, D.O.Pain Medicine (Anesthesiology) Physician1073769147

Verify Mario Him Ming Chan in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
    Search for license 036104346    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Illinois license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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25% more Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024

3,294 Medicare Part D claims for 424 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 44% of claims.

  1. Mario Chan3,294
  2. Specialty average2,630

Most prescribed

  1. Levothyroxine Sodium503 claims
  2. Metformin Hcl200 claims
  3. Atorvastatin Calcium167 claims
  4. Ozempic118 claims
  5. Jardiance113 claims
  6. Nano 2nd Gen Pen Needle106 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: $5,293.90

209 payments; by number, the most common kind was food and beverage; the largest payer was Lilly USA, LLC. 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.

  1. Mario Chan$5,293.90
  2. Specialty average$5,742.15

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

  1. Suburban Endocrinology And DiabetesArlington Heights, IL

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Mario Him Ming Chan among 436 endocrinology, diabetes & metabolism physician records in Illinois

Mario Him Ming Chan, 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 2007, is newer than 38% of them.

  • NPI issued2007 · 38% of these records are older, 50% newer
  • In a Medicare fileYes · 85% of these records are
  • In the CMS Doctors and Clinicians fileYes · 68% of these records are
  • Graduated1989 · median 2006 among the 295 with a school on file
  • Record last updated2012 · 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 Arlington Heights → Endocrinology, Diabetes & Metabolism Physician nationwide →

The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes

  1. Zubair Ilyas, MDArlington Heights, IL 600051780003368
  2. George Motto, M.D.Arlington Heights, IL 600051285693127
  3. Paraskevi Sapountzi, MDArlington Heights, IL 600051932279635
  4. Daniel So, M.D.Arlington Heights, IL 600051023167004
  5. Luis Soruco, M.D.Arlington Heights, IL 600051013065556
  6. Elena BarengoltsArlington Heights, IL 600041942305313
  7. Aspin Makadia, MDArlington Heights, IL 600041912586876
  8. Dipal Shah, DOArlington Heights, IL 600041235386160

Common questions

What is Mario Him Ming Chan, M.D.'s NPI number?

Mario Him Ming Chan, M.D.'s National Provider Identifier (NPI) is 1104975176, issued on Jan 9, 2007. An NPI identifies a provider in billing; it is not a license.

Where is Mario Him Ming Chan, M.D. located?

The NPPES record lists a practice address at 2101 S Arlington Heights RD, Arlington Heights, IL, 60005. Phone: (847) 228-3200. Providers update this record themselves, so call before visiting.

How can I verify Mario Him Ming Chan, M.D.'s license?

NPPES lists Illinois license number 036104346, 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 Mario Him Ming Chan, M.D. prescribe under Medicare Part D?

In 2024, Mario Him Ming Chan, M.D. had 3,294 Medicare Part D claims for 424 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.