ERIN K. WILLITS MD
NPI 1962766402
Allergy & Immunology in Fort Collins, CO
About Erin K. Willits Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ERIN K. WILLITS MD (NPI 1962766402) is an individual allergy & immunology provider in Fort Collins, Colorado, licensed in Colorado (DR.0063320) and active in the NPI registry since June 2012. She is enrolled in Medicare PECOS, maintains a secondary practice location in Cheyenne, and is a graduate of University Of Washington School Of Medicine (2012).
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Secondary Practice Location 1
Other Identifiers 5
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Erin K. Willits Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show Erin Willits reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Fort Collins, CO 80528
- Reassigned Medicare billing, Colorado and Wyoming enrollments
- 4 clinicians in this Medicare group
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 11
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.
Referred Medical Equipment & Supplies CMS DME claims 2
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
Other Providers at the Same Location NPPES 4
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
FORT COLLINS, CO 80528
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 Erin Willits's NPI number?
The NPI number for Erin Willits is 1962766402. It was assigned to this individual provider in the NPPES registry on June 29, 2012. The provider is also known as Erin K Catellier.
Where is Erin Willits located?
Erin Willits practices at 2121 E Harmony Rd Unit 290, Fort Collins, CO 80528. The listed phone number is (970) 221-2370.
What is Erin Willits's specialty?
The primary specialty registered for this NPI is Allergy & Immunology with taxonomy code 207K00000X.
Is Erin Willits enrolled in Medicare?
Yes. Erin Willits is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for Erin Willits's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Erin Willits reassigns Medicare benefits to Allergy Partners Of Colorado PC (Fort Collins, 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 Erin Willits's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Erin Willits accept?
Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from Sunflower Health Plan, Blue Cross Blue Shield of Wyoming and Oscar Insurance Company and 2 other insurers list Erin Willits 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 Erin Willits was last updated on September 29, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 28 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.
# Erin K. Willits, MD · NPI 1962766402
Allergy & Immunology physician in Fort Collins, Colorado. Individual provider, active in the CMS NPPES registry since June 29, 2012.
## Identity
- **NPI:** 1962766402 (Entity type: Individual)
- **Enumerated:** June 29, 2012
- **Primary specialty:** Allergy & Immunology · taxonomy 207K00000X
- **State license:** DR.0063320 (Colorado)
- **Sole proprietor:** No
## Practice location
- **Address:** 2121 E HARMONY RD UNIT 290, Fort Collins, CO 80528-3402
- **Phone:** (970) 221-2370 · **Fax:** (970) 221-9654
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Allergy Partners Of Colorado PC (NPI 1891183299, Fort Collins, CO), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Washington School Of Medicine, class of 2012
## Record status
- **NPPES last updated:** September 29, 2026
- **Other identifiers:** Other W31876 (WY); Medicaid 9000177898 (CO); Medicaid 155603700 (WY); and 2 more
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Source: [NPI Profile](https://npiprofile.com/npi/1962766402) · Data from the CMS NPPES public registry.