Dr. John Glenn Mathis, MD
- Medicare services, 2024
- 947
- Medicare patients, 2024
- 664
- Part D claims, 2024
- 1,869
- MIPS score, 2024
- 51
- Hospital affiliations
- 3
- Practice address
- 53830 Generations Dr Ste A, South Bend, IN 46635
- Practice phone
- Call (574) 271-0893
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Michiana Endoscopy Center
Surgery Center - Medicare-Certified · South Bend, Indiana
Find Dr. Mathis' 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. John Glenn Mathis is a gastroenterologist in South Bend, Indiana
Dr. Mathis practices at Michiana Endoscopy Center in South Bend, Indiana.
Dr. Mathis' NPI, 1427051341, was assigned on May 24, 2005. Dr. Mathis graduated from Indiana University School of Medicine in 1976. Dr. Mathis holds Indiana license 01026543A.
- NPI
- 1427051341NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7315044047
- NPI enumeration date
- May 24, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (574) 271-0893
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 76
- Medical school graduation
- 1976
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John Glenn Mathis practices at Michiana Endoscopy Center in South Bend, Indiana
Dr. Mathis' primary practice is Michiana Endoscopy Center, at 53830 Generations Dr Ste A, South Bend, IN 46635. The practice phone is (574) 271-0893.
- Michiana Endoscopy Center53830 Generations Dr Ste A, South Bend, IN 46635Phone(574) 271-0893
Source: Dmand AI Affiliation Data
Dr. John Glenn Mathis is affiliated with 5 sites of care and 1 medical group
Dr. Mathis' primary practice is Michiana Endoscopy Center in South Bend, Indiana. Dr. Mathis is also affiliated with Memorial Hospital of South Bend. The medical group on file is Michiana Gastroenterology, Inc. Dmand AI also links Dr. Mathis to 2 more hospitals and 1 group practice or clinic, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. John Glenn Mathis' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Mathis practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Michiana Endoscopy Center | Available with a free account |
| +4 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John Glenn Mathis is one of 333 gastroenterologists in Indiana
Gastroenterology is Dr. Mathis' primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Mathis is licensed in Indiana.
Specialties and state licenses
- Gastroenterology, IndianaPrimary
Gastroenterologists near Dr. Mathis
Counts of gastroenterologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. John Glenn Mathis billed Medicare for 947 services in 2024
CMS data shows 947 Medicare services from Dr. Mathis across 16 procedure codes in 2024, for 664 Medicare patients. Medicare paid $108,687 for them.
Dr. Mathis' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Surgery
- 2023: 5512024: 5402%
- Office and hospital visits
- 2023: 3752024: 30818%
- Other services
- 2023: 852024: 788%
- Lab and pathology
- 2023: 262024: 2119%
Where Dr. Mathis' Medicare services took place, 2024
- In an office19120%
- In a facility75680%
Dr. Mathis compared with the Indiana median for gastroenterologists, 2024
- Dr. Mathis
- Indiana median
- Medicare services
- 947vs 4712.0 times
- Medicare patients
- 664vs 3092.1 times
- Part D claims
- 1,579vs 4223.7 times
Medians across 330 gastroenterologists in Indiana with Dmand AI profiles that report each measure.
Dr. Mathis' 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. Mathis?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Mathis and other gastroenterologists in Indiana.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John Glenn Mathis treated 664 Medicare patients in 2024, average age 74
CMS counts 664 Medicare patients who saw Dr. Mathis in 2024. The largest group is 65 to 74, with 316 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 9% are also on Medicaid. Their average risk score is 1.29, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Mathis' median patient age at 67, with 51% women.
Dr. Mathis' Medicare patients by age, 2024
Dr. Mathis' Medicare patients by sex, 2024
- Women35453%
- Men31047%
Chronic conditions among Dr. Mathis' Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis45%
- Diabetes30%
- Mood disorders26%
- Depression25%
- Anxiety24%
- Chronic kidney disease24%
Share of Medicare patients with each condition. A patient can have several.
Dr. Mathis' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 67
Patient panel by sex, all payers
- Women51%
- Men49%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John Glenn Mathis wrote 1,869 Medicare Part D claims in 2024
In 2024, Dr. Mathis wrote 1,869 Medicare Part D claims for 836 patients. 80% of them were for generic drugs. CMS names the drug for 1,579 of them, across 27 drugs with 11 or more claims each, at $384,880 in total drug cost. In 2023, CMS named 1,749 claims across 33 drugs.
Dr. Mathis' Part D claims by kind of drug, 2024
- Generic1,497 claims80%
- Brand-name and other372 claims20%
Dr. Mathis' 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. Mathis' Part D claims, 2024
- Antibiotics2%37 of 1,869 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: 1,7492024: 1,57910%
Drugs named by CMS: 27 in 2024, 33 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. John Glenn Mathis scored 51 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 51 out of 100 for Dr. Mathis for performance year 2024, reported individually. Dr. Mathis accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 208 procedures of colonoscopy by Dr. Mathis, more than 94% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Dr. Mathis' MIPS scores, performance year 2024
- 51of 100Final score
- 0of 100Quality
- 40of 100Improvement Activities
- 72of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Where Dr. Mathis ranks in Medicare procedure volume
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 93rd percentile244 procedures
- Colonoscopy
- 94th percentile208 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)
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Dr. John Glenn Mathis received $21,473 in industry payments from 2016 to 2025
CMS Open Payments shows 1,318 general payments to Dr. Mathis from 49 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 97% of the total. Abbvie Inc. paid the most, $6,019.
General payments to Dr. Mathis by program year, 2016 to 2025
General payments to Dr. Mathis by kind, 2016 to 2025
- Food and beverage$20,79397%
- Travel and lodging$2911%
- Education$2381%
- Speaker and faculty fees$1501%
Companies that paid Dr. Mathis 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. John Glenn Mathis graduated from Indiana University School of Medicine
Dr. Mathis graduated from Indiana University School of Medicine in 1976.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. John Glenn Mathis'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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand 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)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile 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. John Glenn Mathis
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What is Dr. John Glenn Mathis' NPI number?
Dr. John Glenn Mathis' NPI number is 1427051341. It was assigned on May 24, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. John Glenn Mathis?
Dr. John Glenn Mathis is a gastroenterologist in South Bend, Indiana. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. John Glenn Mathis practice?
Dr. Mathis practices at 53830 Generations Dr Ste A, South Bend, IN 46635. Dr. Mathis' primary practice is Michiana Endoscopy Center in South Bend, Indiana. Dmand AI also links Dr. Mathis to 2 hospitals and 1 group practice or clinic.
What is Dr. John Glenn Mathis' office phone number?
The practice phone on file for Dr. Mathis is (574) 271-0893.
What is Dr. John Glenn Mathis' medical license number?
Dr. Mathis holds Indiana license 01026543A.
Which hospitals is Dr. John Glenn Mathis affiliated with?
Dr. Mathis is affiliated with Memorial Hospital of South Bend. Dmand AI links Dr. Mathis to 2 more hospitals.
What medical group is Dr. John Glenn Mathis part of?
Dr. Mathis is linked to Michiana Gastroenterology, Inc.
Does Dr. John Glenn Mathis accept Medicare?
Yes. CMS data shows Dr. Mathis billed Medicare for 947 services in 2024, and Dr. Mathis accepts Medicare assignment.
What is Dr. John Glenn Mathis' MIPS score?
Dr. Mathis' MIPS final score for performance year 2024 is 51 out of 100, reported individually.
How many Medicare patients does Dr. John Glenn Mathis see?
CMS counts 664 Medicare patients who saw Dr. Mathis in 2024, with an average age of 74.
Show 5 more questionsShow fewer questions
What services does Dr. John Glenn Mathis bill to Medicare?
In 2024, Dr. Mathis' most billed Medicare services were surgery: digestive system (45385), office visit, established patient (99214) and surgery: digestive system (43239).
Where did Dr. John Glenn Mathis go to medical school?
Dr. Mathis graduated from Indiana University School of Medicine in 1976.
What drugs does Dr. John Glenn Mathis prescribe most?
In 2024 Medicare Part D data, Dr. Mathis' most prescribed drugs by claims were Sod Sulf-Potass Sulf-Mag Sulf, Pantoprazole Sodium and Omeprazole.
Has Dr. John Glenn Mathis received payments from drug or device companies?
CMS Open Payments shows $21,473 in general payments to Dr. Mathis from 49 companies from 2016 to 2025. The largest total came from Abbvie Inc.
How long has Dr. John Glenn Mathis been practicing?
Dr. Mathis graduated from medical school in 1976, 50 years ago.
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