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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

BOULDER VALLEY GASTROENTEROLOGY INC.
NPI 1902832603
Internal Medicine - Gastroenterology in Lafayette, CO

Active since June 24, 2006CLIA 06D2051232 · Accreditation
1000 W SOUTH BOULDER RD, SUITE 200, LAFAYETTE, CO 80026(303) 604-5000(720) 890-0364 Get Directions Write a Review

NPPES record last updated: October 14, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Oct 14, 2026, Dec 11, 2020, Mar 5, 2020 (3 updates tracked since 2020).

About Boulder Valley Gastroenterology Inc. NPPES

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

BOULDER VALLEY GASTROENTEROLOGY INC. (NPI 1902832603), doing business as Gastroenterology Of The Rockies, is a healthcare organization registered as a gastroenterology in Lafayette, Colorado and active in the NPI registry since June 2006. The organization holds an CLIA Accreditation certificate valid through November 25, 2026, maintains 7 additional practice locations, and lists Daus Mahnke, Board Member, as its authorized official.

NPPES Registry Identity

NPI1902832603
Entity TypeOrganization
Primary Taxonomy207RG0100X
Legal Business NameBOULDER VALLEY GASTROENTEROLOGY INC.
Location Address1000 W SOUTH BOULDER RD, SUITE 200Lafayette, CO 80026-2752
Mailing Address382 S Arthur AveLouisville, CO 80027-3094 · (303) 604-5000 · Fax (720) 890-0364
Phone(303) 604-5000
Fax(720) 890-0364
Organization SubpartNo
Authorized OfficialDaus MahnkeBoard Member · (303) 604-5000
Enumeration DateJune 24, 2006
Last NPPES UpdateOctober 14, 20263 updates tracked since enumeration
NPPES CertifiedOctober 14, 2026
✔ NPI 1902832603 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code207RG0100X
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.
1000 W SOUTH BOULDER RD, Lafayette, CO 80026
Open in Google Maps ↗

Other Names 1

Doing Business AsGastroenterology Of The Rockies

Secondary Practice Locations 7

Location 111900 Grant St Ste 360Northglenn, CO 80233-1117 · Phone (303) 604-5000
Location 213952 Denver West Pkwy Ste 100Lakewood, CO 80401-3141 · Phone (303) 604-5000
Location 31551 Professional Ln Unit 290Longmont, CO 80501-6970 · Phone (303) 604-5000
Location 43301 W 144th Ave Unit 200Broomfield, CO 80023-9511 · Phone (303) 604-5000
Location 516677 Lowell Blvd Ste 200Broomfield, CO 80023-8053 · Phone (303) 604-5000
Location 61960 N Ogden St Ste 210Denver, CO 80218-3668 · Phone (303) 604-5000
Location 71755 48th St Ste 100Boulder, CO 80301-2712 · Phone (303) 604-5000

Other Identifiers 3

Medicaid04004180CO
OtherCD5666CO · Railroad Medicare
OtherGAA1308CO · Bcbs

Medicare Participation & PECOS CMS

Medicare enrollment, revalidation and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Boulder Valley Gastroenterology Inc. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Medicare Revalidation Due Date

Revalidation due by February 28, 2027

Medicare-enrolled providers and suppliers confirm their enrollment information with CMS on a set cycle, every 5 years for most and every 3 years for medical equipment suppliers. CMS sets the due date for each enrollment.

StateEnrollment IDDue date
StateColoradoEnrollment IDO20040130001035Non-DME Part B · Clinic/Group PracticeDue dateFebruary 28, 2027
Source: CMS Revalidation Due Date List, October 2026 release.

Clinicians Billing Medicare Through This Organization

57

Medicare enrollment records show 57 clinicians reassign Medicare billing to Boulder Valley Gastroenterology Inc., which bills Medicare for the services they deliver. Of these, 4 practice at this address and 17 within 10 miles. Listed here are the 20 practicing nearest to this location.

Clinicians by Medicare Specialty 4

Certified Registered Nurse Anesthetist (CRNA)29
Gastroenterology20
Internal Medicine5
Pathology3

Nearest to this location (20)

See all 57
Spencer Harvey, CRNA
Certified Registered Nurse Anesthetist (CRNA)
NPI 1679711758
1000 W SOUTH BOULDER RD
Lafayette, CO 80026
(303) 604-5000
✔ PECOS✔ Accepts MedicareSame address
Daus Mahnke, M.D.
Gastroenterology
NPI 1306878566
1000 W SOUTH BOULDER RD SUITE 200
Lafayette, CO 80026
(303) 604-5000
✔ PECOS✔ Accepts MedicareSame address
Ramu Raju, MD
Gastroenterology
NPI 1275732984
1000 W SOUTH BOULDER RD
Lafayette, CO 80026
(303) 604-5000
✔ PECOS✔ Accepts MedicareSame address
Nathan Susnow, MD
Gastroenterology
NPI 1396891974
1000 W SOUTH BOULDER RD STE 200
Lafayette, CO 80026
(720) 932-7719
✔ PECOS✔ Accepts MedicareSame address
Joseph Cassara, M.D.
Gastroenterology
NPI 1275755290
1000 W SOUTH BOULDER RD
Lafayette, CO 80026
(303) 604-5000
✔ PECOS✔ Accepts Medicare2.5 mi
Elizabeth Nguyen, DO
Internal Medicine
NPI 1720615354
1000 W SOUTH BOULDER RD
Lafayette, CO 80026
(303) 604-5000
✔ PECOS2.5 mi
Gregory Toy, MD
Internal Medicine
NPI 1225599418
1000 W SOUTH BOULDER RD
Lafayette, CO 80026
(303) 604-5000
✔ PECOS✔ Accepts Medicare2.5 mi
Amy Fayling, M.D.
Pathology
NPI 1992917678
382 S ARTHUR AVE
Louisville, CO 80027
(303) 604-5000
✔ PECOS✔ Accepts Medicare3.2 mi
Eric Swartz, CRNA
Certified Registered Nurse Anesthetist (CRNA)
NPI 1114388873
382 S ARTHUR AVE
Louisville, CO 80027
(303) 604-5000
✔ PECOS✔ Accepts Medicare3.2 mi
Lauren Hamm, APRN-CRNA
Certified Registered Nurse Anesthetist (CRNA)
NPI 1831532068
1000 W SOUTH BOULDER RD
Lafayette, CO 80026
(303) 604-5000
✔ PECOS✔ Accepts Medicare3.3 mi
Raul Cubillas Manrique, M.D
Gastroenterology
NPI 1679636120
11900 GRANT ST
Northglenn, CO 80233
(303) 604-5000
✔ PECOS✔ Accepts Medicare6.9 mi
Joshua Steinberg, MD
Gastroenterology
NPI 1154749042
11900 GRANT ST STE 360
Northglenn, CO 80233
(303) 604-5000
✔ PECOS✔ Accepts Medicare6.9 mi
Marissa Fahrbach
Certified Registered Nurse Anesthetist (CRNA)
NPI 1427430032
1755 48TH ST STE 100
Boulder, CO 80301
(303) 604-5000
✔ PECOS9.0 mi
Matthew Karowe, M.D.
Gastroenterology
NPI 1851310478
1755 48TH ST SUITE 100
Boulder, CO 80301
(303) 604-5000
✔ PECOS9.0 mi
Peter Kaye, M.D., F.A.C.G.
Gastroenterology
NPI 1114946639
1755 48TH ST SUITE 100
Boulder, CO 80301
(303) 604-5000
✔ PECOS9.0 mi
Richard Moseley, M.D.
Gastroenterology
NPI 1447343843
1755 48TH ST STE 100
Boulder, CO 80301
(303) 604-5000
✔ PECOS9.0 mi
Kelly Zucker, D.O
Gastroenterology
NPI 1952793846
1755 48TH ST STE 100
Boulder, CO 80301
(303) 604-5000
✔ PECOS✔ Accepts Medicare9.0 mi
Steven Chetham, M.D., F.A.C.P.
Gastroenterology
NPI 1316962376
1551 PROFESSIONAL LN UNIT 290
Longmont, CO 80501
(303) 604-5000
✔ PECOS✔ Accepts Medicare11 mi
Simranjit Bedi, D.O.
Internal Medicine
NPI 1447678271
1551 PROFESSIONAL LN UNIT 290
Longmont, CO 80501
(303) 604-5000
✔ PECOS✔ Accepts Medicare11 mi
Katherine Porter, CRNA
Certified Registered Nurse Anesthetist (CRNA)
NPI 1265799837
1551 PROFESSIONAL LN UNIT 290
Longmont, CO 80501
(303) 604-5000
✔ PECOS✔ Accepts Medicare11 mi
See all 57 clinicians

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

CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Accreditation 06D2051232

Gastroenterology Of The Rockies · Lakewood, CO
Active · expires Nov 25, 2026
CLIA Number06D2051232
Laboratory TypePhysician Office
Certificate Effective DateNovember 26, 2024
Certificate Expiration DateNovember 25, 2026
Laboratory DirectorDr. Amy L. Fayling
Laboratory Phone(303) 444-4066
Laboratory LocationGastroenterology Of The Rockies13952 Denver West Parkway, Suite 100, Lakewood, CO 80401
CLIA data matches this NPI record on: Address Name
This is a certificate that is issued to a laboratory on the basis of the laboratory's accreditation by an accreditation organization approved by CMS.

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 Boulder Valley Gastroenterology Inc.'s NPI number?

The NPI number for Boulder Valley Gastroenterology Inc. is 1902832603. It was assigned to this organization in the NPPES registry on June 24, 2006. The provider is doing business as Gastroenterology of the Rockies.

Where is Boulder Valley Gastroenterology Inc. located?

Boulder Valley Gastroenterology Inc. is located at 1000 W South Boulder Rd Suite 200, Lafayette, CO 80026. The listed phone number is (303) 604-5000.

What is Boulder Valley Gastroenterology Inc.'s specialty?

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

Is Boulder Valley Gastroenterology Inc. enrolled in Medicare?

Yes. Boulder Valley Gastroenterology Inc. is registered in the Medicare PECOS enrollment system.

When is Boulder Valley Gastroenterology Inc.'s Medicare revalidation due?

According to the CMS Revalidation Due Date List (October 2026 release), the Medicare Non-DME Part B enrollment for this organization (Colorado, Clinic/Group Practice) is due for revalidation by February 28, 2027. Medicare providers and suppliers revalidate their enrollment every 5 years, and medical equipment suppliers every 3 years. Confirm current requirements with your Medicare Administrative Contractor.

How many clinicians bill Medicare through Boulder Valley Gastroenterology Inc.?

According to the CMS Revalidation Reassignment List (October 2026 release), 57 clinicians in 4 Medicare specialties reassign their Medicare billing to Boulder Valley Gastroenterology Inc.. A 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 the clinician's services. The largest specialties are Certified Registered Nurse Anesthetist (CRNA) (29), Gastroenterology (20) and Internal Medicine (5). Of these, 4 practice at this address and 17 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Does Boulder Valley Gastroenterology Inc. hold a CLIA laboratory certificate?

Yes. A Certificate of Accreditation (number 06D2051232) is associated with this NPI, valid through November 25, 2026. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for Boulder Valley Gastroenterology Inc. was last updated on October 14, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 days 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.