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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

DR. MARK JOSEPH HARRIS DDS
NPI 1699774711
Dentist - General Practice in Littleton, CO

Active since July 20, 2005PECOS Enrolled
5590 S WINDERMERE ST, LITTLETON, CO 80120(303) 794-3003 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Dr. Mark Joseph Harris Dds NPPES

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

DR. MARK JOSEPH HARRIS DDS (NPI 1699774711) is an individual general practice provider in Littleton, Colorado, licensed in Colorado (6752) and active in the NPI registry since July 2005. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1699774711
Entity TypeIndividualMale
Primary Taxonomy1223G0001X
Provider Legal NameDR. MARK JOSEPH HARRISCredential: DDS
Location Address5590 S WINDERMERE STLittleton, CO 80120-1245
Mailing Address5590 S Windermere StLittleton, CO 80120-1245 · (303) 794-3003
Phone(303) 794-3003
Sole ProprietorNo
Enumeration DateJuly 20, 2005
Last NPPES UpdateJuly 13, 2026
✔ NPI 1699774711 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDentist · General PracticeDental Providers
Taxonomy Code1223G0001X
License✔ Licensed in CO · 6752
Definition
A general dentist is the primary dental care provider for patients of all ages. The general dentist is responsible for the diagnosis, treatment, management and overall coordination of services related to patients' oral health needs.
5590 S WINDERMERE ST, Littleton, CO 80120
Open in Google Maps ↗

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include BEST Life, Blue Cross and Blue Shield of Montana, Blue Cross and Blue Shield of Oklahoma and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Mark Joseph Harris Dds 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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 80120 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
$89.43 typical visit price
range $58.06 – $174.82
Typical copayment $22.35 (range $14.51 – $43.70)
Most-billed visit code 99203
Established Patient
$72.20 typical visit price
range $18.88 – $142.79
Typical copayment $18.05 (range $4.72 – $35.69)
Most-billed visit code 99213
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 2

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

CLAIRE-MARIE FICSOR DMD PLLC
Dentist
5590 S WINDERMERE ST, SUITE A
LITTLETON, CO 80120
Arapahoe County (303) 798-4571
DR. DARRIN WILLIAM ROBERTSON D.C.
Chiropractor
5590 S WINDERMERE ST
LITTLETON, CO 80120
Arapahoe County (303) 347-1909

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 Mark Harris's NPI number?

The NPI number for Mark Harris is 1699774711. It was assigned to this individual provider in the NPPES registry on July 20, 2005.

Where is Mark Harris located?

Mark Harris practices at 5590 S Windermere St, Littleton, CO 80120. The listed phone number is (303) 794-3003.

What is Mark Harris's specialty?

The primary specialty registered for this NPI is Dentist, specializing in General Practice, with taxonomy code 1223G0001X.

Is Mark Harris enrolled in Medicare?

Yes. Mark Harris is registered in the Medicare PECOS enrollment system.

What insurance does Mark Harris accept?

Health plans from BEST Life, Blue Cross and Blue Shield of Montana, Blue Cross and Blue Shield of Oklahoma, Blue Cross and Blue Shield of Texas and HRI Dental & Vision and 4 other insurers list Mark Harris as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Mark Harris was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 23 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.