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- 1500 E Medical Center Dr, Ann Arbor, MI 48109
About Dr. Byrn
John C. Byrn, MD is a healthcare provider in Ann Arbor, MI specializing in colon & rectal surgery. John is also listed as specializing in surgery. Medicare claims data shows John provided 151 services to 133 patients. The services billed most often include new patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more, established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more, and initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes. This provider record is associated with NPI 1174798235.
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
- (734) 936-4000
- Email not available
Practice Locations
1500 E MEDICAL CENTER DR
Ann Arbor, MI 48109
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
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
Infections
Infections & cysts
Pelvic floor & structure
Tumors & growths
Vascular & inflammatory
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
Endoscopy & minimally invasive
- Transanal Minimally Invasive Surgery
- Colon polyp removal
- Flexible sigmoidoscopy
Excision & drainage
- Anal Skin Tag Removal
- Anal Wart Removal
- Drainage of anal abscess
- Pilonidal cyst surgery
Fistula procedures
- Seton Drain Placement
General surgery
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
Digestive health
Pelvic floor & prolapse
- Pelvic organ prolapse surgery
- Rectal prolapse repair
- Sacral neuromodulation
Therapy & rehabilitation
Procedures Most Often Billed to Medicare
151 services · 133 patients · 6 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Diagnostic exam of anus using an endoscope | Procedure | 46600 |
15 | Less often than most peers in Colon & Rectal Surgery |
| New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more | Office visit | 99205 |
39 | More often than most peers in Colon & Rectal Surgery |
| Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more | Office visit | 99215 |
38 | More often than most peers in Colon & Rectal Surgery |
| Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | Office visit | 99223 |
24 | More often than most peers in Colon & Rectal Surgery |
| New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more | Office visit | 99203 |
21 | As often as other peers in Colon & Rectal Surgery |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
14 | 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.
Related specialists at this location 2
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.
Other colorectal surgeons in Ann Arbor 4
Same specialty, same city.
More connections — 24 related providers in 3 groups
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2002 at Other 8
Providers who graduated from the same medical school in the same year.
Also performs Diagnostic exam of anus using an endoscope 8
Providers in MI who bill this service to Medicare most often.
Common questions
What kind of doctor is Dr. Byrn?
Dr. Byrn is a colorectal surgeon in Ann Arbor, MI. That is the designation recorded for this NPI in the federal registry, where it is listed as “Colon & Rectal Surgery”.
NPI registry
What is Dr. Byrn's address?
Dr. Byrn is listed at 1500 E Medical Center Dr, Ann Arbor, MI 48109. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Dr. Byrn?
The number on file is (734) 936-4000. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Dr. Byrn?
Dr. Byrn's National Provider Identifier is 1174798235. 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. Byrn train?
Dr. Byrn attended Other, graduating in 2002. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Byrn have?
Dr. Byrn has 24 years experience. Calculated from a graduation year of 2002, reported in the CMS National Downloadable File.
CMS public data
What procedures does Dr. Byrn perform?
According to Medicare billing data, Dr. Byrn performs procedures including diagnostic exam of anus using an endoscope, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Byrn's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Byrn. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.