What is Mark Gillis's NPI number?

Mark Gillis's National Provider Identifier (NPI) is 1992806509, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Mark Gillis's specialty?

Mark Gillis is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).

Where is Mark Gillis located?

Mark Gillis's practice location on file with NPPES is 1300 N Arlington Heights Rd Ste 130, Itasca, IL 60143-3128.

What is Mark Gillis's phone number?

The practice phone number listed in the NPPES registry for Mark Gillis is (847) 871-4540.

Does Mark Gillis accept Medicare?

Mark Gillis is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.

Is Mark Gillis's NPI active?

Yes — Mark Gillis's NPI (1992806509) is active in the NPPES registry as of the last update on 2023-08-31.

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Mark Gillis, MD

NPI 1992806509 · Family Medicine Physician · Itasca, IL

Mark Gillis, MD is a Family Medicine Physician provider in Itasca, IL (NPI 1992806509).

Provider details

NPI number: 1992806509
Entity type: Individual
Primary specialty: Family Medicine PhysicianAllopathic & Osteopathic Physicians
Credential: MD
Sex: Male
Sole proprietor: No
License: 036078671 (IL)

Practice location

1300 N Arlington Heights Rd Ste 130

Itasca, IL 60143-3128

Phone: (847) 871-4540

Fax: (847) 871-4597

Street-level locationGet directions

More IL providers

Mailing address

Po Box 713260

Chicago, IL 60677-1260

Specialties & taxonomies

Family Medicine PhysicianPrimary207Q00000XLicense 036078671 (IL)
Allopathic & Osteopathic Physicians

Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)

Profile Score

Detailed profile(94/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure25% of score
20 yrs in NPPES registry
Profile completeness25% of score
100% of core fields populated
Practice footprint15% of score
1 documented practice location
Medicare service volume (vs. specialty peers)25% of score
4,272 Medicare services, 2024 (ranked within specialty)
Open Payments transparency10% of score
Has Open Payments disclosures (2024)

Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.

What this provider does (Medicare)

Based on Medicare fee-for-service claims, 2024; not all care is captured.

Service (HCPCS)	Medicare services	Typical Medicare-allowed (2024)
Insertion of Needle Into Vein for Collection of Blood Sample36415	667	$9
Blood Test, Comprehensive Group of Blood Chemicals80053	443	$10
Blood Test, Lipids (cholesterol and Triglycerides)80061	410	$13
Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214	358	$132
Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025	353	$8
Hemoglobin A1c Level83036	348	$10

What this provider prescribes (Medicare Part D)

Top drugs by Medicare Part D claim volume, 2024 · 106 distinct drugs on file.

Drug	Part D claims (2024)	Beneficiaries
Atorvastatin Calcium	926	268
Levothyroxine Sodium	440	118
Amlodipine Besylate	394	115
Lisinopril	389	105
Losartan Potassium	244	65
Metoprolol Succinate	240	76
Rosuvastatin Calcium

Transparency — industry payments

Based on CMS Open Payments, 2024; not all care is captured.

$22 across 1 record (Open Payments 2024)

Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.

Enumerated: 2006-09-26
Last updated: 2023-08-31
Certified: 2023-08-31

Frequently asked questions

What is Mark Gillis's NPI number?: Mark Gillis's National Provider Identifier (NPI) is 1992806509, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is Mark Gillis's specialty?: Mark Gillis is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
Where is Mark Gillis located?: Mark Gillis's practice location on file with NPPES is 1300 N Arlington Heights Rd Ste 130, Itasca, IL 60143-3128.
What is Mark Gillis's phone number?: The practice phone number listed in the NPPES registry for Mark Gillis is (847) 871-4540.
Does Mark Gillis accept Medicare?: Mark Gillis is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
Is Mark Gillis's NPI active?: Yes — Mark Gillis's NPI (1992806509) is active in the NPPES registry as of the last update on 2023-08-31.

Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.

What this provider does (Medicare)

Based on Medicare fee-for-service claims, 2024; not all care is captured.

Service (HCPCS)	Medicare services	Typical Medicare-allowed (2024)
Insertion of Needle Into Vein for Collection of Blood Sample36415	667	$9
Blood Test, Comprehensive Group of Blood Chemicals80053	443	$10
Blood Test, Lipids (cholesterol and Triglycerides)80061	410	$13
Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214	358	$132
Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025	353	$8
Hemoglobin A1c Level83036	348	$10