Am J Case Rep
AbdomenAbdominal InjuriesColonoscopy
Dr. Brian Gillis, DO
NPI1386711877PAC ID8123009289
- Medicare services, 2024
- 644
- Medicare patients, 2024
- 116
- Part D claims, 2024
- 410
- Publications
- 1
- Hospital affiliations
- 2
- Practice address
- 200 Kennedy Memorial Dr, Waterville, ME 04901
- Practice phone
- Call (207) 861-3152
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Northern Light Inland Hospital (CLOSED)
Waterville, Maine
Find Dr. Gillis' professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Brian Gillis is a colorectal surgeon in Waterville, Maine
Dr. Gillis practices at Northern Light Inland Hospital (CLOSED) in Waterville, Maine.
Dr. Gillis' NPI, 1386711877, was assigned on November 29, 2006. Dr. Gillis graduated from UNE College of Osteopathic Medicine in 1995. Dr. Gillis holds Maine license 1513.
NPI and contact details
- NPI
- 1386711877NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8123009289
- NPI enumeration date
- November 29, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (207) 861-3152
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 57
- Medical school graduation
- 1995
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Brian Gillis practices at Northern Light Inland Hospital (CLOSED) in Waterville, Maine
Dr. Gillis' primary practice is Northern Light Inland Hospital (CLOSED), at 200 Kennedy Memorial Dr, Waterville, ME 04901 in Kennebec County. The practice phone is (207) 861-3152.
- Northern Light Inland Hospital (CLOSED)200 Kennedy Memorial Dr, Waterville, ME 04901 · Kennebec CountyPhone(207) 861-3152
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Brian Gillis is affiliated with 3 sites of care and 2 medical groups
Dr. Gillis' primary practice is Northern Light Inland Hospital (CLOSED) in Waterville, Maine. Dr. Gillis is also affiliated with St. Mary's Regional Medical Center. The medical group on file is St. Mary's Health System. Dmand AI also links Dr. Gillis to 1 more hospital and 1 medical group, each named with a free account.
Northern Light Inland Hospital (CLOSED)Primary
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Brian Gillis' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Gillis practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Northern Light Inland Hospital (CLOSED) | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
See the EHR and IT leaders at every site where Dr. Gillis practices
Dmand AI maps EHR vendors, IT decision makers and buying committees across each health system and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Brian Gillis is one of 10 colorectal surgeons in Maine
Colon and rectal surgery is Dr. Gillis' primary specialty in the NPI Registry, under taxonomy code 208C00000X. Dr. Gillis is board certified in proctology by the AOA Board of Proctology. Dr. Gillis is licensed in Maine.
Specialties and state licenses
- Colon and rectal surgery, MainePrimary
Clinical focus
Dmand AI lists colonoscopy and hemorrhoids among the conditions Dr. Gillis treats.
Colorectal surgeons near Dr. Gillis
Counts of colorectal surgeons with a Dmand AI profile, by place and practice. Each opens the list.
10colorectal surgeons in Maine
2colorectal surgeons in Waterville
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Brian Gillis billed Medicare for 644 services in 2024
CMS data shows 644 Medicare services from Dr. Gillis across 10 procedure codes in 2024, for 116 Medicare patients. Medicare paid $125,354 for them.
Medicare services, 2024644
Medicare patients116
Paid by Medicare$125,354
Procedure codes10
Dr. Gillis' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Surgery
- 2023: 3522024: 3335%
- Tests and treatments
- 2023: 1842024: 1689%
- Office and hospital visits
- 2023: 1502024: 1435%
Where Dr. Gillis' Medicare services took place, 2024
- In an office59993%
- In a facility457%
Dr. Gillis compared with the Maine median for colorectal surgeons, 2024
- Dr. Gillis
- Maine median
- Medicare services
- 644vs 956.8 times
- Part D claims
- 309vs 863.6 times
Medians across 10 colorectal surgeons in Maine with Dmand AI profiles that report each measure.
Dr. Gillis' most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Gillis?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Gillis and other colorectal surgeons in Maine.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Brian Gillis treated 116 Medicare patients in 2024, average age 72
CMS counts 116 Medicare patients who saw Dr. Gillis in 2024. The largest group is 65 to 74, with 47 patients. 69% of them have high cholesterol, and 58% have high blood pressure. 22% are also on Medicaid. Their average risk score is 0.99, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Gillis' median patient age at 68, with 50% women.
Medicare patients, 2024116
Average age72
Average risk score0.99
Also on Medicaid22%
Dr. Gillis' Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Gillis' Medicare patients by sex, 2024
- Women5245%
- Men6455%
Chronic conditions among Dr. Gillis' Medicare patients, 2024
- High cholesterol69%
- High blood pressure58%
- Arthritis45%
- Anxiety31%
- Mood disorders27%
- Ischemic heart disease25%
- Depression23%
- Diabetes22%
Share of Medicare patients with each condition. A patient can have several.
Dr. Gillis' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 68
Patient panel by sex, all payers
- Women50%
- Men50%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Brian Gillis wrote 410 Medicare Part D claims in 2024
In 2024, Dr. Gillis wrote 410 Medicare Part D claims for 142 patients. 83% of them were for generic drugs. CMS names the drug for 309 of them, across 13 drugs with 11 or more claims each, at $57,284 in total drug cost. In 2023, CMS named 229 claims across 7 drugs.
Part D claims, 2024410
Drugs named by CMS13
Total drug cost$57,284
Part D patients142
Dr. Gillis' Part D claims by kind of drug, 2024
- Generic342 claims83%
- Brand-name68 claims17%
Dr. Gillis' most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Gillis' Part D claims, 2024
- Opioids3%11 of 410 claims
- Antibiotics10%40 of 410 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 2292024: 30935%
Drugs named by CMS: 13 in 2024, 7 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Brian Gillis ranks in the 65th percentile for colonoscopy in Medicare
Dr. Gillis accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 54 procedures of colonoscopy by Dr. Gillis, more than 65% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Gillis ranks in Medicare procedure volume
- Colonoscopy
- 65th percentile54 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Melanoma (skin cancer) excision: 1 to 10 procedures (CMS shows small counts as a range)
Skin biopsy: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
For MedTech and pharma teams
Find colorectal surgeons like Dr. Gillis by procedure volume and prescribing
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Brian Gillis has 1 publication on record
Dmand AI links 1 paper to Dr. Gillis in 2021. Dr. Gillis' most frequent co-author is Rick A. Shacket, DO, MD.
Papers1
Dr. Gillis' most frequent co-authors
Recent publications by Dr. Gillis
See who Dr. Gillis researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Gillis works with, so you can find a warm path to the right colorectal surgeons.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Brian Gillis received $3,906 in industry payments from 2016 to 2025
CMS Open Payments shows 284 general payments to Dr. Gillis from 13 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 99% of the total. Takeda Pharmaceuticals U.S.A., Inc. paid the most, $1,554.
General payments to Dr. Gillis by program year, 2016 to 2025
General payments to Dr. Gillis by kind, 2016 to 2025
$3.9Kin total
- Food and beverage$3,87499%
- Education$321%
Companies that paid Dr. Gillis the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Brian Gillis serves on 2 committees
Dr. Gillis serves on Chair of the tumor board and Former Chief of surgery current vice chief of Physican staff at Inland/EMMC.
Dr. Gillis' committees and leadership roles
- Chair of the tumor boardChair
- 2013 to present
- Former Chief of surgery current vice chief of Physican staff at Inland/EMMCVice Chief
- 2007 to present
Source: Dmand AI Professional Profile Data
Dr. Brian Gillis graduated from UNE College of Osteopathic Medicine
Dr. Gillis graduated from UNE College of Osteopathic Medicine in 1995. Dr. Gillis is a member of AOA.
- Medical school
- Board certified in proctology
- Board certified in 1996 - 2026
- Board certified in 1998 - 2001
Source: Dmand AI Professional Profile Data
Dr. Brian Gillis accepts plans from 15 insurance carriers
Dr. Gillis is in network with 15 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 10. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Elevance
- HCSC
- Aspirus Health Plan
- Blue Cross Blue Shield of Massachusetts
- Humana
- +7 more carriersWith a free account
Plan types Dr. Gillis accepts, by number of carriers
- PPO10
- Medicare8
- HMO7
- EPO4
- POS4
Source: Dmand AI Insurance Network Data
Sources for Dr. Brian Gillis's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Brian Gillis
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Brian Gillis' NPI number?
Dr. Brian Gillis' NPI number is 1386711877. It was assigned on November 29, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Brian Gillis?
Dr. Brian Gillis is a colorectal surgeon in Waterville, Maine. The primary specialty in the NPI Registry is Colon & Rectal Surgery Physician (taxonomy code 208C00000X).
Where does Dr. Brian Gillis practice?
Dr. Gillis practices at 200 Kennedy Memorial Dr, Waterville, ME 04901. Dr. Gillis' primary practice is Northern Light Inland Hospital (CLOSED) in Waterville, Maine. Dmand AI also links Dr. Gillis to 1 hospital and 1 medical group.
What is Dr. Brian Gillis' office phone number?
The practice phone on file for Dr. Gillis is (207) 861-3152.
What is Dr. Brian Gillis' medical license number?
Dr. Gillis holds Maine license 1513.
Which hospitals is Dr. Brian Gillis affiliated with?
Dr. Gillis is affiliated with St. Mary's Regional Medical Center. Dmand AI links Dr. Gillis to 1 more hospital.
What medical group is Dr. Brian Gillis part of?
Dr. Gillis is linked to St. Mary's Health System. Dmand AI links Dr. Gillis to 1 more medical group.
Does Dr. Brian Gillis accept Medicare?
Yes. CMS data shows Dr. Gillis billed Medicare for 644 services in 2024, and Dr. Gillis accepts Medicare assignment.
How many Medicare patients does Dr. Brian Gillis see?
CMS counts 116 Medicare patients who saw Dr. Gillis in 2024, with an average age of 72.
Is Dr. Brian Gillis board certified?
Yes. Dr. Gillis is board certified in proctology by the AOA Board of Proctology.
Show 8 more questionsShow fewer questions
What services does Dr. Brian Gillis bill to Medicare?
In 2024, Dr. Gillis' most billed Medicare services were surgery: digestive system (46604), surgery: digestive system (46500) and office visit, established patient (99214).
Where did Dr. Brian Gillis go to medical school?
Dr. Gillis graduated from UNE College of Osteopathic Medicine in 1995.
What drugs does Dr. Brian Gillis prescribe most?
In 2024 Medicare Part D data, Dr. Gillis' most prescribed drugs by claims were Hydrocortisone, Linzess and Procto-Med Hc.
Has Dr. Brian Gillis received payments from drug or device companies?
CMS Open Payments shows $3,906 in general payments to Dr. Gillis from 13 companies from 2016 to 2025. The largest total came from Takeda Pharmaceuticals U.S.A., Inc.
How long has Dr. Brian Gillis been practicing?
Dr. Gillis graduated from medical school in 1995, 31 years ago.
Does Dr. Brian Gillis do research?
Dmand AI links 1 publication to Dr. Gillis.
Who does Dr. Brian Gillis publish with?
Dr. Gillis' most frequent co-authors are Rick A. Shacket, DO, MD (1 shared paper).
What insurance does Dr. Brian Gillis accept?
Dr. Gillis is in network with 15 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 10. Check the plan with the practice before a visit.
Selling to colon and rectal surgery practices?
See colorectal surgeons in Maine by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card