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DR. ALEXANDER DUFF DC
NPI 1205398732
Chiropractor in Boulder, CO

Active since April 03, 2019
3083 WALNUT ST, BOULDER, CO 80301(303) 440-0500 Get Directions Write a Review

NPPES record last updated: April 3, 2019. Verified against the NPPES registry weekly; last sync: November 08, 2026.

About Dr. Alexander Duff Dc NPPES

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

DR. ALEXANDER DUFF DC (NPI 1205398732) is an individual chiropractor in Boulder, Colorado, licensed in Colorado (0007920) and active in the NPI registry since April 2019. He is a graduate of Life Chiropractic College - West (2018).

NPPES Registry Identity

NPI1205398732
Entity TypeIndividualMale
Primary Taxonomy111N00000X
Provider Legal NameDR. ALEXANDER DUFFCredential: DC
Location Address3083 WALNUT STBoulder, CO 80301-2509
Mailing Address3083 Walnut StBoulder, CO 80301-2509 · (303) 440-0500
Phone(303) 440-0500
Sole ProprietorYes
Medical School CMSLife Chiropractic College - WestGraduated 2018
Enumeration DateApril 3, 2019
✔ NPI 1205398732 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyChiropractorChiropractic Providers
Taxonomy Code111N00000X
License✔ Licensed in CO · 0007920
Definition
A provider qualified by a Doctor of Chiropractic (D.C.), licensed by the State and who practices chiropractic medicine -that discipline within the healing arts which deals with the nervous system and its relationship to the spinal column and its interrelationship with other body systems.
3083 WALNUT ST, Boulder, CO 80301
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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Alexander Duff Dc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID3870835531
PECOS Enrollment IDI20190429001291

Medicare Billing Reassignment

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

Lyle Chiropractic, PLLC
Same address
Chiropractor
3083 WALNUT ST
Boulder, CO 80301
  • Reassigned Medicare billing, Colorado enrollment
  • 3 clinicians in this Medicare group
NPI 1043772544 (303) 440-0550

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

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.

Chiropractic manipulative treatment, 3-4 spinal regions 98941
Chiropractic manipulative treatment for 3-4 spinal regions involves a trained professional applying controlled force to specific areas of your spine. This can help alleviate pain, improve physical function, and support your body's natural healing process.
260 services18 patients

Other Providers at the Same Location NPPES 6

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

LYLE CHIROPRACTIC, PLLC
Chiropractor
3083 WALNUT ST
BOULDER, CO 80301
Boulder County (303) 440-0550
NATALIE M LYLE D.C.
Chiropractor
3083 WALNUT ST
BOULDER, CO 80301
Boulder County (303) 440-0500
DR. EMILY ROSE FEERO DC
Chiropractor
3083 WALNUT ST
BOULDER, CO 80301
Boulder County (303) 440-0500
PHYSICAL MEDICINE OF COLORADO, PLLC
General Practice
3083 WALNUT ST
BOULDER, CO 80301
Boulder County (303) 440-0500
DOUGLAS JAY TERRY D.C.
Chiropractor
3083 WALNUT ST
BOULDER, CO 80301
Boulder County (303) 440-0500
ALLIANCE HEALTH OF COLORADO
Physical Medicine & Rehabilitation
3083 WALNUT ST
BOULDER, CO 80301
Boulder County (303) 440-0500

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 Alexander Duff's NPI number?

The NPI number for Alexander Duff is 1205398732. It was assigned to this individual provider in the NPPES registry on April 3, 2019.

Where is Alexander Duff located?

Alexander Duff practices at 3083 Walnut St, Boulder, CO 80301. The listed phone number is (303) 440-0500.

What is Alexander Duff's specialty?

The primary specialty registered for this NPI is Chiropractor with taxonomy code 111N00000X.

Is Alexander Duff enrolled in Medicare?

Yes. Alexander Duff is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Alexander Duff's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Alexander Duff reassigns Medicare benefits to Lyle Chiropractic, PLLC (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 Alexander Duff'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 Alexander Duff was last updated on April 3, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.