Physician Profile
Unclaimed ProfileAbout GILLIS
Based in Itasca, IL, Mark Christopher Gillis, MD is listed in the NPI registry under family medicine. Medicare claims data shows Mark provided 4,113 services to 3,252 patients.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Areas of Expertise
Common questions
What does Dr. Gillis specialise in?
Dr. Gillis is a family doctor in Itasca, IL. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “Family Medicine”.
NPI registry
Where is Dr. Gillis located?
Dr. Gillis is listed at 1300 N ARLINGTON HEIGHTS RD STE 130, Itasca, IL 60143. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Gillis's phone number?
The number on file is (847) 871-4540. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. Gillis?
Dr. Gillis's National Provider Identifier is 1992806509. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
How much experience does Dr. Gillis have?
Dr. Gillis has 20+ years experience. Registered with an NPI since 2006. National Provider Identifiers only began in 2005, so a provider who qualified earlier may have practised for longer than this.
NPI registry
What does Dr. Gillis do most often?
According to Medicare billing data, Dr. Gillis performs procedures including insertion of needle into vein for collection of blood sample; provides treatments such as routine electrocardiogram using at least 12 leads with interpretation and report and influenza vaccine, inactivated, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Gillis's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Gillis. If this is you, claiming it is free.
Guide.md
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (847) 871-4540
- Email not available
Practice Locations
1300 N ARLINGTON HEIGHTS RD STE 130
Itasca, IL 60143
Procedures Most Often Billed to Medicare
4,113 services · 3,252 patients · 25 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Insertion of needle into vein for collection of blood sample | Procedure | 36415 |
667 |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | Treatment | 93000 |
42 |
| Influenza vaccine, inactivated | Treatment | 90653 |
31 |
| Pneumococcal conjugate vaccine, 20 valent (pcv20), for intramuscular use | Treatment | 90677 |
30 |
| Blood test, comprehensive group of blood chemicals | Lab test | 80053 |
443 |
| Blood test, lipids (cholesterol and triglycerides) | Lab test | 80061 |
410 |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
358 |
| Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count | Lab test | 85025 |
353 |
| Hemoglobin a1c level | Lab test | 83036 |
348 |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
268 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
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Claim this profileRelated providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Related specialists at this location 4
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Also performs Insertion of needle into vein for collection of blood sample 8
Providers in IL who bill this service to Medicare most often.
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.