Dr. Alyssa Ellsworth , DDS
Dentist - General Practice β’ Boulder, CO
4150 Darley Ave Ste 3
Boulder, CO 803056537
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
Practice Location & Contact Primary Location
4150 Darley Ave Ste 3
Boulder, CO 803056537
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
NPPES lists 1 additional practice-address record in Lone Tree, CO. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
What Public CMS Data Show
Dentist - General Practice: NPPES taxonomy is a reported classification, not proof of board certification.
Open Payments general payments, program year 2025
All general payments: $179.15 across 2 records.
By nature of payment
- Food and Beverage: $179.15 across 2 records.
Reporting-company totals
- Align Technology, Inc.: $179.15 across 2 records.
A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.
Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2025 (published June 30, 2026).
NPI first issued
2015
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Medicare assignment not listed
CMS data do not show whether this clinician accepts Medicare assignment. This does not mean they do not accept Medicare. Ask the office.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, βDoes your provider accept Medicare as full payment?β
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Dr. Ellsworth has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Dr. Ellsworth as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Boulder and Colorado
97 active clinicians are listed under Dentist - General Practice with a practice address in Boulder, CO (2,493 in Colorado).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Boulder
0% of these 97 clinicians have the CMS telehealth indicator.
1% of these 97 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
-
Industry payments (Open Payments)
Industry payments (Open Payments) went from $18.17 in 2019 to $179.15 in 2025.
- 2019: $18.17
- 2022: $12.47
- 2025: $179.15
Sources: CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo Β· Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2025 (payments made January 1 β December 31, 2025): fewer than 11 records totaling $179.15.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Align Technology, Inc. |
Food and Beverage
Cash or cash equivalent
|
Invisalign | General | $162.80 |
| Align Technology, Inc. |
Food and Beverage
Cash or cash equivalent
|
Invisalign | General | $16.35 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Specialties & License Numbers Reported to NPPES
NUCC Taxonomy Code: 1223G0001X
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.
NUCC Taxonomy Code: 390200000X
An individual who is enrolled in an organized health care education/training program leading to a degree, certification, registration, and/or licensure to provide health care.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSORDER AND REFERRING ONLY - DENTIST
I20161020000610
CO
8729366026
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Secondary Practice Locations
10000 Commons St
Lone Tree, CO 801245501
Phone: 3039994578
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Dentist - General Practice
Doctor of Dental Surgery
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 4150 DARLEY AVE STE 3, BOULDER, CO 803056537 (Tel: 3034990013)
Registered at 2258 W 35TH AVE, DENVER, CO 802112908 (Tel: 3148099609)
Student in an Organized Health Care Education/Training Program
NPI status registered as active in NPPES database
Registered at 10000 COMMONS ST, LONE TREE, CO 801245501 (Tel: 3039994578)
Registered at 3309 BLAKE ST, SUITE 211, DENVER, CO 802052465 (Tel: 3148099609)
Recorded as ALYSSA ELLSWORTH, DDS
Dentist (license number reported to NPPES: CO 00202776)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Dentist - General Practices in Boulder
- Coralee Hueske
- Dr. Christopher Frederick, DMD
- Dr. Alexandria Balich, DDS
- Dr. Stephen Travis, DDS
- Dr. Adam Kwiatkowski, DMD
- Dr. Milena Halek, DDS
Mailing Address
2258 W 35th Ave
Denver, CO 802112908
Phone: 3148099609