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Edit this profileAt a glance
- 1500 East Medical Center Dr, 3Rd Floor Taubman Ctr Recp D, Ann Arbor, MI 48109
About Dr. Wiley
Based in Ann Arbor, MI, John W. Wiley, MD is listed in the NPI registry under gastroenterology. John graduated from Oregon Health Sciences University School of Medicine in 1980. John is also listed as specializing in internal medicine. According to Medicare claims data, the services billed most often include telephone medical discussion with physician, 21-30 minutes. NPI 1164507778 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
- (734) 647-5944
- Email not available
Practice Locations
1500 EAST MEDICAL CENTER DR 3RD FLOOR TAUBMAN CTR RECP D
Ann Arbor, MI 48109
Conditions Commonly Evaluated or Treated
Within Gastroenterology 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
Most searched conditions
- Acid reflux
- Celiac disease
- Crohn's disease
- Hemorrhoids
- IBS
- Swallowing difficulties
- Ulcerative colitis
Biliary and pancreas
Colon and anorectal
Esophagus and swallowing
Functional bowel and motility
Liver
- Ascites
- Autoimmune hepatitis
- Cirrhosis
- Fatty liver disease
- Hemochromatosis
- Hepatitis B
- Hepatitis C
- Portal hypertension
Stomach and duodenum
Bowel & Colon
Digestive Symptoms
Gallbladder & Bile Ducts
Procedures & services
Most searched procedures
Lower endoscopy
Upper endoscopy
Capsule and physiology testing
Diagnostic Testing
Liver procedures
Treatments
Procedures Most Often Billed to Medicare
12 services · 11 patients · 1 distinct code
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Telephone medical discussion with physician, 21-30 minutes | Office visit | 99443 |
12 | Less often than most peers in Gastroenterology |
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.
Other gastroenterologists at this location 1
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 5
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.
More connections — 24 related providers in 3 groups
Other gastroenterologists in Ann Arbor 8
Same specialty, same city.
Trained at Oregon Health Sciences University School of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 1980 at Oregon Health Sciences University School of Medicine 8
Providers who graduated from the same medical school in the same year.
Common questions
What does Dr. Wiley specialize in?
Dr. Wiley is a gastroenterologist in Ann Arbor, MI. That is the designation recorded for this NPI in the federal registry, where it is listed as “Gastroenterology”.
NPI registry
Where is Dr. Wiley located?
Dr. Wiley is listed at 1500 East Medical Center Dr 3Rd Floor Taubman Ctr Recp D, Ann Arbor, MI 48109. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Wiley's phone number?
The number on file is (734) 647-5944. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Dr. Wiley's NPI number?
Dr. Wiley's National Provider Identifier is 1164507778. 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. Wiley go to medical school?
Dr. Wiley attended Oregon Health Sciences University School of Medicine, graduating in 1980. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Wiley been practicing?
Dr. Wiley has 46 years experience. Calculated from a graduation year of 1980, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Wiley do most often?
According to Medicare billing data, Dr. Wiley the Medicare record under this individual NPI shows mainly office visits and diagnostic testing. Hospital-based physicians usually have their procedural work billed by the facility rather than under their own number, so this is a floor on their practice, not a description of it. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Wiley confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Wiley. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.