John Charles Byrn, MD
Colon & Rectal Surgery Physician · Ann Arbor, MI
John Charles Byrn, MD is a colon & rectal surgery physician with a practice address in Ann Arbor, Michigan, and NPI 1174798235, issued on Apr 29, 2008. Check the license (Michigan 4301106798, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- John Charles Byrn
- Credential
- MD
- Primary taxonomy
- Colon & Rectal Surgery Physician 208C00000X
- License number
- 4301106798 MI
Self-reported in NPPES; status is on the state search - Practice location
- 1500 E Medical Center Dr, Ann Arbor, MI 48109
- Phone
- (734) 936-4000
- Enumerated
- Apr 29, 2008
- Record last updated
- Oct 20, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20150720000810); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest colon & rectal surgery physician records → All 87 in Michigan → Look up another NPI →
Also registered at 1500 E Medical Center Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify John Charles Byrn in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 4301106798Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
17% fewer Medicare Part D claims than the average colon & rectal surgery physician in 2024
159 Medicare Part D claims for 70 beneficiaries, against an average of 192 among the 1,836 providers of this specialty who prescribed in Part D. Brand-name drugs were 21% of claims.
Most prescribed
- Peg 3350-Electrolyte66 claims
- Metronidazole34 claims
- Neomycin Sulfate30 claims
- Magnesium Sulfate12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Regents OF The University OF MichiganAnn Arbor, MI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Charles Byrn among 87 colon & rectal surgery physician records in Michigan
John Charles Byrn, MD is one of 87 colon & rectal surgery physician records with a practice address in Michigan. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 56% of them.
- NPI issued2008 · 56% of these records are older, 36% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2002 · median 2004 among the 63 with a school on file
- Record last updated2020 · 52% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208C00000X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Colon & Rectal Surgery Physician providers in Michigan
There are 87 colon & rectal surgery physician records in Michigan.
All 87 in Michigan → Every provider in Ann Arbor → Colon & Rectal Surgery Physician nationwide →
The 8 colon & rectal surgery physician records with the nearest ZIP codes
- Samantha Hendren, MDAnn Arbor, MI 481091366479354
- Alisha Lussiez, MDAnn Arbor, MI 481091316473580
- Michael McGee, M.D.Ann Arbor, MI 481091578767588
- Scott Regenbogen, MDAnn Arbor, MI 481091871574095
- Gifty Kwakye, MDBrighton, MI 481161124342621
- Calista Harbaugh, MDChelsea, MI 481181215340625
- Arpit Aggarwal, DODearborn, MI 481241356879035
- Guat Sy, MDDearborn, MI 481261114929791
Common questions
What is John Charles Byrn, MD's NPI number?
John Charles Byrn, MD's National Provider Identifier (NPI) is 1174798235, issued on Apr 29, 2008. An NPI identifies a provider in billing; it is not a license.
Where is John Charles Byrn, MD located?
The NPPES record lists a practice address at 1500 E Medical Center Dr, Ann Arbor, MI, 48109. Phone: (734) 936-4000. Providers update this record themselves, so call before visiting.
How can I verify John Charles Byrn, MD's license?
NPPES lists Michigan license number 4301106798, as entered by the provider. Search the Michigan Board of Medicine (LARA) at https://aca-prod.accela.com/MILARA/GeneralProperty/PropertyLookUp.aspx?isLicensee=Y&TabName=APO. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John Charles Byrn, MD prescribe under Medicare Part D?
In 2024, John Charles Byrn, MD had 159 Medicare Part D claims for 70 beneficiaries; the average among colon & rectal surgery physician prescribers was 192. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.