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Edit this profileAt a glance
- 8 Water St, Oakland, ME 04963
About Dr. Gillis
Based in Oakland, ME, Brian Gillis, DO is listed in the NPI registry under colon & rectal surgery. Brian graduated from University of New England, College of Osteo Medicine in 1995. Medicare claims data shows Brian provided 644 services to 477 patients. The services billed most often include dilation of anus using an endoscope, injection of hemorrhoid, and established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more. NPI 1386711877 identifies this record in the national registry.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (207) 465-3003
- Email not available
Is this your home address or personal number? Hide it
Practice Locations
8 WATER ST
Oakland, ME 04963
Conditions Commonly Evaluated or Treated
Within Colon and Rectal Surgery generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Anorectal conditions
- Rectal Ulcer
- Anal fistula
Anorectal disorders
- Anal Itching
- Anal Skin Tags
- Anal Stricture
- Perianal Hematoma
- Rectovaginal Fistula
Bowel disorders
- Bowel Blockage in Babies
- Constipation From Pain Medicine
- Difficulty Emptying Bowels
- Severely Enlarged Colon
- Twisted Bowel
- Chronic diarrhea
Bowel symptoms
- Diverticulosis
- Constipation
- Lower gastrointestinal bleeding
Cancer
- Precancerous Anal Cells
- Anal cancer
- Appendix cancer
- Inherited Cancer Risk
Colon conditions
- Inherited Colon Polyps
Inflammatory bowel disease
- Radiation Proctitis
- Ulcerative colitis
Inflammatory conditions
- Rectal Inflammation
Ostomy & bowel
- Stoma and ostomy issues
Ostomy & surgical complications
- Stoma Problems
Pain
- Rectal Pain
- Tailbone pain
Pelvic disorders
- Bowel Endometriosis
Skin conditions
- Perianal Boils
Most searched conditions
- Anal fissures
- Colon cancer
- Crohn's disease
- Diverticulitis
- Hemorrhoids
Digestive emergencies
- Bowel obstruction
- Perforated gastrointestinal tract
Infections
- C. diff Infection
Infections & cysts
- Genital warts
- Perianal abscess
- Pilonidal cyst
Pelvic floor & structure
- Fecal incontinence
- Pelvic floor dysfunction
- Pelvic organ prolapse
- Rectal prolapse
Tumors & growths
- Colon polyps
Vascular & inflammatory
- Mesenteric ischemia
Procedures & services
Abdominal surgery
- Bowel Adhesion Removal
- Appendectomy
Anorectal procedures
- Anal Dilation
Bowel management
- Transanal Irrigation
Cancer surgery
- Complete Rectum and Anus Removal
- Heated Chemotherapy for Abdominal Cancer
- Low Anterior Resection
Diagnostic tests
- Endorectal Ultrasound
- J-Pouch Scope
- Rectal Exam with Scope
Diagnostics
- Defecography
- High-Resolution Anorectal Manometry
- High-Resolution Anoscopy
- Prostate Ultrasound
Digestive
- Bowel Retraining Program
Endoscopy & minimally invasive
- Colon polyp removal
- Flexible sigmoidoscopy
- Transanal Minimally Invasive Surgery
Excision & drainage
- Anal Skin Tag Removal
- Anal Wart Removal
- Drainage of anal abscess
- Pilonidal cyst surgery
Fistula procedures
- Seton Drain Placement
General surgery
- Hemorrhoid banding and treatment
Hemorrhoid treatments
- Hemorrhoid Injections
- Laser Hemorrhoid Treatment
- Rubber-band ligation of hemorrhoids
Infection & Microbiology Tests
Inflammatory bowel surgery
- Bowel-Sparing Surgery for Crohn's
Injections & pain relief
- Anal Sphincter Botox
Minimally invasive surgery
- Robotic Colon Surgery
Ostomy & bowel
- Ostomy bag fitting and care
- Ostomy leak troubleshooting
Ostomy surgery
- Colostomy Placement
- Ileostomy Surgery
- Parastomal Hernia Repair
- Stoma Revision
Pelvic therapy
- Pelvic Biofeedback Therapy
Reconstructive surgery
- J-Pouch Surgery
- Rectovaginal Fistula Repair
- Anal Sphincter Repair
- Ostomy reversal
Wound care
- Stoma Site Marking Before Surgery
Most searched procedures
- Bowel resection
- Colonoscopy
- Fistula repair
- Hemorrhoid removal
Cancer screening
- Cancer Genetic Testing
Digestive health
- Stool Transplant
Pelvic floor & prolapse
- Pelvic organ prolapse surgery
- Rectal prolapse repair
- Sacral neuromodulation
Therapy & rehabilitation
Procedures Most Often Billed to Medicare
644 services · 477 patients · 10 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Dilation of anus using an endoscope | Procedure | 46604 |
122 | Too few peers to compare |
| Injection of hemorrhoid | Procedure | 46500 |
120 | More often than most peers in Colon & Rectal Surgery |
| Non-needle measurement and recording of electrical activity of muscles at bladder and bowel openings | Procedure | 51784 |
77 | More than most peers in Colon & Rectal Surgery |
| Diagnostic exam of large bowel using a flexible endoscope | Procedure | 45378 |
14 | As often as other peers in Colon & Rectal Surgery |
| Test for tone and sensation of rectum and anus | Treatment | 91120 |
77 | More than most peers in Colon & Rectal Surgery |
| Study of rectum sensitivity and function | Treatment | 91122 |
76 | More than most peers in Colon & Rectal Surgery |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | Treatment | 93010 |
15 | Too few peers to compare |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
103 | More than most peers in Colon & Rectal Surgery |
| New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more | Office visit | 99204 |
24 | As often as other peers in Colon & Rectal Surgery |
| Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more | Office visit | 99212 |
16 | Less often than most peers in Colon & Rectal Surgery |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
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.
Trained at University of New England, College of Osteo Medicine 4
Other providers in the same specialty who trained at the same institution.
Class of 1995 at University of New England, College of Osteo Medicine 8
Providers who graduated from the same medical school in the same year.
Common questions
What does Dr. Gillis specialize in?
Dr. Gillis is a colorectal surgeon in Oakland, ME. That is the designation recorded for this NPI in the federal registry, where it is listed as “Colon & Rectal Surgery”.
NPI registry
Where is Dr. Gillis located?
Dr. Gillis is listed at 8 Water St, Oakland, ME 04963. 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 (207) 465-3003. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Dr. Gillis?
Dr. Gillis's National Provider Identifier is 1386711877. 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
Where did Dr. Gillis go to medical school?
Dr. Gillis attended University of New England, College of Osteo Medicine, graduating in 1995. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Gillis have?
Dr. Gillis has 31 years experience. Calculated from a graduation year of 1995, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Gillis do most often?
According to Medicare billing data, Dr. Gillis performs procedures including dilation of anus using an endoscope, injection of hemorrhoid and non-needle measurement and recording of electrical activity of muscles at bladder and bowel openings; provides treatments such as test for tone and sensation of rectum and anus and study of rectum sensitivity and function, 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.
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