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KARIN M RETTIG MD
NPI 1366402679
Internal Medicine - Gastroenterology in Saint Paul, MN

Active since March 23, 2006PECOS Enrolled
2550 UNIVERSITY AVE W, SUITE 423 SOUTH, SAINT PAUL, MN 55114(612) 870-5557(612) 870-5857 Get Directions Write a Review

NPPES record last updated: March 24, 2008. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Karin M Rettig Md NPPES

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

KARIN M RETTIG MD (NPI 1366402679) is an individual gastroenterology provider in Saint Paul, Minnesota, licensed in Minnesota (41057) and active in the NPI registry since March 2006. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1366402679
Entity TypeIndividualFemale
Primary Taxonomy207RG0100X
Provider Legal NameKARIN M RETTIGCredential: MD
Location Address2550 UNIVERSITY AVE W, SUITE 423 SOUTHSaint Paul, MN 55114-1052
Mailing AddressPo Box 14909Minneapolis, MN 55414-0909 · (612) 870-5557 · Fax (612) 870-5857
Phone(612) 870-5557
Fax(612) 870-5857
Sole ProprietorNo
Enumeration DateMarch 23, 2006
Last NPPES UpdateMarch 24, 2008
✔ NPI 1366402679 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 MN · 41057
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.
2550 UNIVERSITY AVE W, Saint Paul, MN 55114
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Other Identifiers 2

Medicare UPINH15981MN
Medicare PINRR PTAN P00152339MN

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Karin M Rettig Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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 Karin Rettig reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Mngi Digestive Health, P.A.
2.5 mi
Gastroenterology
3001 BROADWAY ST NE STE 500
Minneapolis, MN 55413
  • Reassigned Medicare billing, Minnesota enrollment
  • Medicare enrollment name: Mngi Digestive Health PA
  • 322 clinicians in this Medicare group
NPI 1609804541 (612) 871-1145

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 9

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.

Injection, vedolizumab, intravenous, 1 mg J3380
Vedolizumab is a medication given via injection. It's used to treat certain bowel conditions (such as Crohn's disease, ulcerative colitis) by reducing inflammation. It works by blocking a certain protein that causes this inflammation.
5,700 services13 patients
Injection, infliximab, excludes biosimilar, 10 mg J1745
Infliximab is a medication given via injection to treat certain autoimmune conditions. It works by blocking the action of a substance in your body that causes inflammation. Each dose is based on your medical condition and response to treatment.
1,130 services12 patients
Pathology examination of tissue using a microscope, intermediate complexity 88305
A pathology examination of tissue with intermediate complexity involves studying a small sample of your body tissue under a microscope. This helps in identifying any abnormal cells or signs of disease. It's a detailed process requiring expert analysis to ensure accurate results.
58 services33 patients
Insertion of needle into vein for collection of blood sample 36415
This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.
30 services15 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.
20 services19 patients
Infusion into a vein for therapy, prevention, or diagnosis, 1 hour or less 96365
This is a procedure where a medical professional inserts a small tube into your vein to deliver medication, nutrients, or fluids directly into your bloodstream. This can be for treatment, prevention, or diagnosis. The process typically takes less than an hour.
19 services13 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 55114 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
$127.61 typical visit price
range $56.00 – $168.28
Typical copayment $31.90 (range $14.00 – $42.07)
Most-billed visit code 99204
Established Patient
$98.61 typical visit price
range $18.32 – $138.04
Typical copayment $24.65 (range $4.58 – $34.51)
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.

Other Providers at the Same Location NPPES 20

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

MRS. MELISSA LEA URBANEK LMFT
Marriage & Family Therapist
2550 UNIVERSITY AVE W, STE 435 S
SAINT PAUL, MN 55114
Ramsey County (651) 647-1900
MICHELLE S KENNEDY MD
Internal Medicine (Gastroenterology)
2550 UNIVERSITY AVE W, SUITE 423 SOUTH
SAINT PAUL, MN 55114
Ramsey County (612) 870-5557
TYANN ZEAL R.D., L.D.
Dietitian, Registered
2550 UNIVERSITY AVE W
SAINT PAUL, MN 55114
Ramsey County (952) 993-6200
AMY LAWRENCE L.M.F.T.
Marriage & Family Therapist
2550 UNIVERSITY AVE W, SUITE 314N
SAINT PAUL, MN 55114
Ramsey County (651) 645-5323
SHANNON O'DONNELL L.P.
Psychologist (Clinical)
2550 UNIVERSITY AVE W, SUITE 314N
SAINT PAUL, MN 55114
Ramsey County (651) 645-5323
EMILY KATHRYN KAHNERT DPT
Physical Therapist
2550 UNIVERSITY AVE W, SUITE 189S
SAINT PAUL, MN 55114
Ramsey County (651) 332-7474
GERALD PATRICK CRIMMINS PSYD CP
Psychologist
2550 UNIVERSITY AVE W, STE 229N
SAINT PAUL, MN 55114
Ramsey County (651) 645-3115
CARMEN JEAN JACOBSON P.A.-C
Physician Assistant (Medical)
2550 UNIVERSITY AVE W, SUITE 110N
SAINT PAUL, MN 55114
Ramsey County (651) 602-5311

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Karin Rettig's NPI number?

The NPI number for Karin Rettig is 1366402679. It was assigned to this individual provider in the NPPES registry on March 23, 2006.

Where is Karin Rettig located?

Karin Rettig practices at 2550 University Ave W Suite 423 South, Saint Paul, MN 55114. The listed phone number is (612) 870-5557.

What is Karin Rettig's specialty?

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

Is Karin Rettig enrolled in Medicare?

Yes. Karin Rettig is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Karin Rettig's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Karin Rettig reassigns Medicare benefits to Mngi Digestive Health, P.A. (Minneapolis, MN). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Karin Rettig's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Karin Rettig was last updated on March 24, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.