1. Home
  2. Directory
  3. Colorado
  4. Boulder
  5. Internal Medicine
  6. NPI Profile

DR. MATTHEW W KAROWE M.D.
NPI 1851310478
Internal Medicine - Gastroenterology in Boulder, CO

Active since July 18, 2006PECOS Enrolled
1755 48TH ST, SUITE 100, BOULDER, CO 80301(303) 604-5000(720) 890-0364 Get Directions Write a Review

NPPES record last updated: March 5, 2020. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. Matthew W Karowe M.d. NPPES

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

DR. MATTHEW W KAROWE M.D. (NPI 1851310478) is an individual gastroenterology provider in Boulder, Colorado, licensed in Colorado (38584) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1851310478
Entity TypeIndividualMale
Primary Taxonomy207RG0100X
Provider Legal NameDR. MATTHEW W KAROWECredential: M.D.
Location Address1755 48TH ST, SUITE 100Boulder, CO 80301-2711
Mailing Address382 S Arthur AveLouisville, CO 80027-3094 · (303) 604-5000 · Fax (720) 890-0364
Phone(303) 604-5000
Fax(720) 890-0364
Sole ProprietorNo
Enumeration DateJuly 18, 2006
Last NPPES UpdateMarch 5, 2020
NPPES CertifiedMarch 5, 2020
✔ NPI 1851310478 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 CO · 38584
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.
1755 48TH ST, Boulder, CO 80301
Open in Google Maps ↗

Other Identifiers 3

OtherKA657684CO · Bcbs
Other100001601CO · Railroad Medicare
Medicaid76173038CO

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Matthew W Karowe M.d. 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 Matthew Karowe reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Boulder Valley Gastroenterology Inc.
Same address
Gastroenterology
1755 48TH ST STE 100
Boulder, CO 80301
  • Reassigned Medicare billing, Colorado enrollment
  • 57 clinicians in this Medicare group
NPI 1720674955 (303) 604-5000

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.

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.
79 services79 patients
Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito G0500
Moderate sedation is a method where a physician uses medication to help you relax during a gastrointestinal endoscopy. An independent trained observer will be present to monitor your vital signs and ensure your safety throughout the procedure. It's a common and safe practice.
56 services56 patients
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.
40 services40 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.
34 services30 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.
24 services22 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.
23 services23 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 80301 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
$132.55 typical visit price
range $58.06 – $174.82
Typical copayment $33.13 (range $14.51 – $43.70)
Most-billed visit code 99204
Established Patient
$102.03 typical visit price
range $18.88 – $142.79
Typical copayment $25.50 (range $4.72 – $35.69)
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 10

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

DR. PETER S KAYE M.D., F.A.C.G.
Internal Medicine (Gastroenterology)
1755 48TH ST, SUITE 100
BOULDER, CO 80301
Boulder County (303) 604-5000
SUE A GRIFFITH P.A.
Physician Assistant
1755 48TH ST, SUITE 200
BOULDER, CO 80301
Boulder County (303) 415-7450
DEAN J BEASLEY M.D.
Family Medicine
1755 48TH ST, SUITE 200
BOULDER, CO 80301
Boulder County (303) 494-5263
CHERYL A GRASMICK P.A.
Physician Assistant
1755 48TH ST, SUITE 200
BOULDER, CO 80301
Boulder County (303) 494-5263
ZARA PAULETTE FRANKEL MD
Family Medicine
1755 48TH ST, SUITE 200
BOULDER, CO 80301
Boulder County (303) 415-7450
MS. VICKI L QUARLES LCSW
Social Worker (Clinical)
1755 48TH ST, SUITE 200
BOULDER, CO 80301
Boulder County (303) 494-5263
ENDOSCOPY CENTER OF THE ROCKIES LLC
Clinic/Center (Ambulatory Surgical)
1755 48TH ST, SUITE 100
BOULDER, CO 80301
Boulder County (303) 604-5000
DR. JASON ANDREW CANNELL DO
Family Medicine
1755 48TH ST, SUITE 200
BOULDER, CO 80301
Boulder County (303) 415-7450

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 Matthew Karowe's NPI number?

The NPI number for Matthew Karowe is 1851310478. It was assigned to this individual provider in the NPPES registry on July 18, 2006.

Where is Matthew Karowe located?

Matthew Karowe practices at 1755 48th St Suite 100, Boulder, CO 80301. The listed phone number is (303) 604-5000.

What is Matthew Karowe's specialty?

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

Is Matthew Karowe enrolled in Medicare?

Yes. Matthew Karowe is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Matthew Karowe's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Matthew Karowe reassigns Medicare benefits to Boulder Valley Gastroenterology Inc. (Boulder, CO). 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 Matthew Karowe'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 Matthew Karowe was last updated on March 5, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.