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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 RADIOLOGISTS INC P C
NPI 1891756813
Radiology - Diagnostic Radiology in Boulder, CO

Active since March 29, 2006
4747 ARAPAHOE AVE, BOULDER, CO 80303(303) 473-7500(303) 440-2168 Get Directions Write a Review

NPPES record last updated: October 16, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Oct 16, 2026, Mar 15, 2021, Sep 3, 2020 and 1 more (4 updates tracked since 2016).

About Boulder Radiologists Inc P C NPPES

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

BOULDER RADIOLOGISTS INC P C (NPI 1891756813) is a healthcare organization registered as a diagnostic radiology in Boulder, Colorado and active in the NPI registry since March 2006. The organization maintains a secondary practice location in Broomfield and lists Roger Nichols, President, as its authorized official.

NPPES Registry Identity

NPI1891756813
Entity TypeOrganization
Primary Taxonomy2085R0202X
Legal Business NameBOULDER RADIOLOGISTS INC P C
Location Address4747 ARAPAHOE AVEBoulder, CO 80303-1131
Mailing AddressPo Box 200523Dallas, TX 75320-0523 · (800) 475-6112
Phone(303) 473-7500
Fax(303) 440-2168
Organization SubpartNo
Authorized OfficialRoger NicholsPresident · (303) 473-7500
Enumeration DateMarch 29, 2006
Last NPPES UpdateOctober 16, 20264 updates tracked since enumeration
NPPES CertifiedOctober 16, 2026
✔ NPI 1891756813 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyRadiology · Diagnostic RadiologyAllopathic & Osteopathic Physicians
Taxonomy Code2085R0202X
Definition
A radiologist who utilizes x-ray, radionuclides, ultrasound and electromagnetic radiation to diagnose and treat disease.
4747 ARAPAHOE AVE, Boulder, CO 80303
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Secondary Practice Location 1

Location 136 Garden CtrBroomfield, CO 80020-1730 · Phone (303) 465-0401 ext. 102 · Fax (303) 438-1351

Other Identifiers 2

OtherCS6650CO · Medicare Railroad
Medicaid04995049CO

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Boulder Radiologists Inc P C is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

14

Medicare enrollment records show 14 clinicians reassign Medicare billing to Boulder Radiologists Inc P C, which bills Medicare for the services they deliver. Of these, 3 practice at this address and 9 within 10 miles. They are listed nearest first.

Clinicians by Medicare Specialty 2

Diagnostic Radiology12
Interventional Radiology2

Clinicians, nearest first (14)

Matthew Blomquist, M.D.
Diagnostic Radiology
NPI 1487629036
4747 ARAPAHOE AVE
Boulder, CO 80303
(303) 415-7500
✔ PECOS✔ Accepts MedicareSame address
Gustavo Isuani, M.D.
Diagnostic Radiology
NPI 1073588778
4747 ARAPAHOE AVE
Boulder, CO 80303
(303) 465-0401
✔ PECOS✔ Accepts MedicareSame address
Roger Nichols, M.D.
Diagnostic Radiology
NPI 1336114891
4747 ARAPAHOE AVE
Boulder, CO 80303
(303) 415-7000
✔ PECOS✔ Accepts MedicareSame address
Richard Finer, M.D.
Diagnostic Radiology
NPI 1669465001
1100 BALSAM AVE RADIOLOGY
Boulder, CO 80304
(303) 440-2273
✔ PECOS✔ Accepts Medicare2.6 mi
Robert Helgans, M.D.
Diagnostic Radiology
NPI 1295728780
1100 BALSAM AVE RADIOLOGY
Boulder, CO 80304
(303) 465-0401
✔ PECOS✔ Accepts Medicare2.6 mi
Jie Mao, M.D.
Interventional Radiology
NPI 1942293485
1100 BALSAM AVE RADIOLOGY
Boulder, CO 80304
(303) 440-2273
✔ PECOS✔ Accepts Medicare2.6 mi
Christopher Nusser, M.D.
Diagnostic Radiology
NPI 1538152038
1100 BALSAM AVE RADIOLOGY
Boulder, CO 80304
(303) 465-0401
✔ PECOS✔ Accepts Medicare2.6 mi
Nicholas Wickersham, M.D.
Diagnostic Radiology
NPI 1396867222
1100 BALSAM AVE
Boulder, CO 80304
(303) 532-3500
✔ PECOS✔ Accepts Medicare2.6 mi
David Oppenheimer, M.D.
Diagnostic Radiology
NPI 1700851250
1100 BALSAM AVE
Boulder, CO 80304
(303) 440-2273
✔ PECOS2.6 mi
Jay Johnson, M.D.
Diagnostic Radiology
NPI 1669574497
1010 THREE SPRINGS BLVD
Durango, CO 81301
(970) 259-2525
✔ PECOS✔ Accepts Medicare237 mi
Thomas Fahrbach, MD
Interventional Radiology
NPI 1962558577
3901 RAINBOW BLVD MAIL STOP 4032
Kansas City, KS 66160
(913) 588-6805
✔ PECOS✔ Accepts Medicare571 mi
Zachary Lambertsen, M.D.
Diagnostic Radiology
NPI 1770922882
500 S UNIVERSITY AVE STE 101
Little Rock, AR 72205
(501) 664-3914
✔ PECOS✔ Accepts Medicare796 mi
Catherine Evans, M.D.
Diagnostic Radiology
NPI 1013329648
1500 SAN PABLO ST FL 2
Los Angeles, CA 90033
(323) 442-8541
✔ PECOS✔ Accepts Medicare825 mi
Larry Nickell, MD
Diagnostic Radiology
NPI 1669797346
315 SOUTH MANNING BLVD
Albany, NY 12208
(518) 525-1401
✔ PECOS✔ Accepts Medicare1,636 mi

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

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 Radiologists Inc P C's NPI number?

The NPI number for Boulder Radiologists Inc P C is 1891756813. It was assigned to this organization in the NPPES registry on March 29, 2006.

Where is Boulder Radiologists Inc P C located?

Boulder Radiologists Inc P C is located at 4747 Arapahoe Ave, Boulder, CO 80303. The listed phone number is (303) 473-7500.

What is Boulder Radiologists Inc P C's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.

Is Boulder Radiologists Inc P C enrolled in Medicare?

Yes. Boulder Radiologists Inc P C is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Boulder Radiologists Inc P C?

According to the CMS Revalidation Reassignment List (October 2026 release), 14 clinicians in 2 Medicare specialties reassign their Medicare billing to Boulder Radiologists Inc P C. 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 Diagnostic Radiology (12) and Interventional Radiology (2). Of these, 3 practice at this address and 9 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Boulder Radiologists Inc P C was last updated on October 16, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.