DR. JOHN GLENN MATHIS M.D.
NPI 1427051341
Internal Medicine - Gastroenterology in South Bend, IN

Q: What is John Mathis's NPI number?

The NPI number for John Mathis is 1427051341. It was assigned to this individual provider in the NPPES registry on May 24, 2005.

Q: What is John Mathis's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Q: When was this NPI record last updated?

The NPPES record for John Mathis was last updated on October 4, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since May 24, 2005PECOS EnrolledAccepts Medicare Assignment

66.25/100

CMS Quality Rating

17501 GENERATIONS DR, SOUTH BEND, IN 46635(574) 234-0049(574) 251-2861 Get Directions Write a Review

NPPES record last updated: October 4, 2010. Verified against the NPPES registry weekly; last sync: October 18, 2026.

On this page

About Dr. John Glenn Mathis M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. JOHN GLENN MATHIS M.D. (NPI 1427051341) is an individual gastroenterology provider in South Bend, Indiana, licensed in Indiana (01026543A) and active in the NPI registry since May 2005. He is enrolled in Medicare PECOS, is affiliated with Saint Joseph Regional Medical Center, and is a graduate of Indiana University School Of Medicine (1976).

NPPES Registry Identity

NPI1427051341

Entity TypeIndividualMale

Primary Taxonomy207RG0100X

Provider Legal NameDR. JOHN GLENN MATHISCredential: M.D.

Location Address17501 GENERATIONS DRSouth Bend, IN 46635-1589

Mailing Address17501 Generations DrSouth Bend, IN 46635-1589 · (574) 234-0049 · Fax (574) 251-2861

Phone(574) 234-0049

Fax(574) 251-2861

Sole ProprietorNo

Medical School CMSIndiana University School Of MedicineGraduated 1976

Enumeration DateMay 24, 2005

Last NPPES UpdateOctober 4, 2010

✔ NPI 1427051341 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians

Taxonomy Code207RG0100X

License✔ Licensed in IN · 01026543A

Definition

An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.

17501 GENERATIONS DR, South Bend, IN 46635

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Other Identifiers 7

Other000000084425IN · Anthem

Medicaid100223380AIN

Other4359074IN · Aetna

Other2010421004IN · Cigna

Other110082368IN · Railroad Medicare

Medicare UPINC25584IN

Medicare PIN736980BIN

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Buckeye Health Plan, Ambetter from Meridian, Ambetter Health and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. John Glenn Mathis M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID7315044047

PECOS Enrollment IDI20101007001427

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show John Mathis reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Michiana Gastroenterology, Inc

0.2 mi

Gastroenterology

17501 GENERATIONS DR
South Bend, IN 46635

Reassigned Medicare billing, Indiana enrollment
15 clinicians in this Medicare group

NPI 1821094525 (574) 234-0049

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 16

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Removal of polyps or growths of large bowel using an endoscope with mechanical snare 45385

This procedure involves using a thin, flexible tube called an endoscope to examine the large bowel. If any abnormal growths or polyps are found, a tool called a mechanical snare is used to remove them. This is a common method to prevent potential health issues.

188 services185 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

157 services126 patients

Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43239

This procedure involves using a thin, flexible tube with a light and camera, known as an endoscope, to examine the esophagus, stomach, and upper part of the small intestine. Small tissue samples are taken for further examination to help diagnose various conditions.

122 services116 patients

Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223

Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.

94 services93 patients

Biopsy of large bowel using a flexible endoscope 45380

A biopsy of the large bowel using a flexible endoscope is a procedure where a thin, flexible tube with a camera is inserted through the rectum to examine the bowel. If abnormal tissue is found, a small sample is taken for further examination. This helps in diagnosing conditions like inflammation, polyps, or cancer.

77 services77 patients

Insertion of guide wire with dilation of esophagus using a flexible endoscope 43248

This is a procedure where a thin tube, called an endoscope, is gently passed through your mouth into your esophagus. A guide wire is then inserted to help widen any narrow areas. This helps improve swallowing and reduce discomfort.

56 services55 patients

Colorectal cancer screening; colonoscopy on individual at high risk G0105

Colorectal cancer screening, specifically a colonoscopy, is a preventive measure for those at high risk. A thin, flexible tube with a camera inspects the colon to spot any abnormal growths. This test helps detect potential issues early, enhancing the effectiveness of treatment.

50 services50 patients

Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43235

This procedure, known as an upper endoscopy, involves inserting a thin, flexible tube with a camera down the throat to examine the esophagus, stomach, and upper small bowel. It helps diagnose conditions like ulcers or inflammation.

43 services43 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233

Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.

28 services22 patients

Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk G0121

Colorectal cancer screening, such as a colonoscopy, is a preventive measure to detect early signs of cancer in the large intestine. For individuals not at high risk, it's typically recommended at age 50. A small, flexible tube with a camera is used to examine your colon. It's a safe, effective way to catch issues early.

28 services28 patients

Diagnostic exam of large bowel using a flexible endoscope 45378

This procedure, known as a colonoscopy, involves using a flexible tube with a light and camera to examine the large intestine. It helps detect any abnormalities such as polyps or inflammation. It's a standard procedure to ensure gut health.

27 services27 patients

Bacterial culture for anaerobic isolates 87076

A bacterial culture for anaerobic isolates is a laboratory test that helps identify bacteria that thrive in environments with little or no oxygen. This assists in diagnosing infections caused by such bacteria and determining the most effective treatment.

21 services21 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

16 services12 patients

Control of bleeding of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43255

This procedure involves using a flexible tube with a light, called an endoscope, to examine and treat bleeding in the esophagus, stomach, or upper small bowel. It's a safe, effective way to control bleeding and ensure your digestive health.

14 services14 patients

Balloon dilation of esophagus, stomach, and/or upper small bowel using a flexible endoscope, less than 3.0 cm 43249

This procedure involves using a flexible tube with a camera, called an endoscope, to gently expand narrowed areas in your esophagus, stomach, or upper small bowel. A small balloon is inflated, making it easier for food and liquid to pass through. It's safe and effective.

13 services12 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

13 services13 patients

Hospital Affiliations CMS Care Compare 3

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Saint Joseph Regional Medical Center

Acute Care Hospitals · Mishawaka, IN

2/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number150012

Location5215 Holy Cross PkwyMishawaka, IN 46545 · St. Joseph County

Emergency services Birthing friendly

Memorial Hospital Of South Bend

Acute Care Hospitals · South Bend, IN

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number150058

Location615 N Michigan StSouth Bend, IN 46601 · St. Joseph County

Emergency services Birthing friendly

Saint Joseph Regional Medical Center - Plymouth

Acute Care Hospitals · Plymouth, IN

2/5 CMS rating

OwnershipVoluntary non-profit - Church

CMS Certification Number150076

Location1915 Lake AvePlymouth, IN 46563 · Marshall County

Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 46635 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$122.49 typical visit price

range $53.07 – $161.76

Typical copayment $30.62 (range $13.26 – $40.44)

Most-billed visit code 99204

Established Patient

$94.22 typical visit price

range $16.93 – $132.22

Typical copayment $23.55 (range $4.23 – $33.05)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

66.25/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Individually scored

Quality

52.93

Improvement Activities

Cost

50.28

Reported Quality Measures

Colorectal Cancer Screening

41%312 patients2/55-star benchmark: 88%

Controlling High Blood Pressure

47%208 patients3/55-star benchmark: 91%

Documentation of Current Medications in the Medical Record

36%731 patients1/55-star benchmark: 100%

Falls: Screening for Future Fall Risk

0%325 patients1/55-star benchmark: 100%

HIV Screening

1%213 patients1/55-star benchmark: 60%

Preventive Care and Screening: Body Mass Index (BMI) Screening and Follow-Up Plan

62%527 patients3/55-star benchmark: 98%

Preventive Care and Screening: Screening for High Blood Pressure and Follow-Up Documented

7%731 patients1/55-star benchmark: 61%

Preventive Care and Screening: Tobacco Use: Screening and Cessation Intervention

Patients combinedPopulations: 57% · 536 patients

Patients screened: 94% · 536 patients

0%101 patients1/55-star benchmark: 100%

Use of High-Risk Medications in Older Adults

Lower rates are better for this measure.

Patients appropriateDiagnosis: 0% · 325 patients

Patients totalRate: 1% · 325 patients

1%325 patients4/55-star benchmark: 100%

Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

Other Providers at the Same Location NPPES 11

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. PANKAJ A PATEL M.D.

Internal Medicine (Gastroenterology)