BROOKE ASHTON CASTILLO OD
NPI 1881539666
Optometrist in Fremont, MI
About Brooke Ashton Castillo Od NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
BROOKE ASHTON CASTILLO OD (NPI 1881539666) is an individual optometrist in Fremont, Michigan, licensed in Michigan (4901005978) and active in the NPI registry since April 2026. She is enrolled in Medicare PECOS and is a graduate of Ferris State College - College Of Optometry (2026).
NPPES Registry Identity
Specialties & Licenses
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
Brooke Ashton Castillo Od 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 Brooke Castillo reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Fremont, MI 49412
- Reassigned Medicare billing, Michigan enrollment
- 14 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 49412 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 5
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
FREMONT, MI 49412
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 Brooke Castillo's NPI number?
The NPI number for Brooke Castillo is 1881539666. It was assigned to this individual provider in the NPPES registry on April 20, 2026.
Where is Brooke Castillo located?
Brooke Castillo practices at 1231 W Main St, Fremont, MI 49412. The listed phone number is (231) 924-2700.
What is Brooke Castillo's specialty?
The primary specialty registered for this NPI is Optometrist with taxonomy code 152W00000X.
Is Brooke Castillo enrolled in Medicare?
Yes. Brooke Castillo 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 Brooke Castillo's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Brooke Castillo reassigns Medicare benefits to E.C. One, PLLC (Fremont, MI). 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 Brooke Castillo's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Brooke Castillo accept?
Health plans from Ambetter Health, Ambetter from Buckeye Health Plan, Ambetter from Meridian, Anthem Blue Cross and Blue Shield and Blue Care Network of Michigan and 7 other insurers list Brooke Castillo 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 Brooke Castillo was last updated on June 16, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 months 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.
# Brooke Ashton Castillo, OD · NPI 1881539666
Optometrist provider in Fremont, Michigan. Individual provider, active in the CMS NPPES registry since April 20, 2026.
## Identity
- **NPI:** 1881539666 (Entity type: Individual)
- **Enumerated:** April 20, 2026
- **Primary specialty:** Optometrist · taxonomy 152W00000X
- **State license:** 4901005978 (Michigan)
- **Sole proprietor:** No
## Practice location
- **Address:** 1231 W MAIN ST, Fremont, MI 49412-1484
- **Phone:** (231) 924-2700
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health
- **Bills Medicare through:** E.C. One, PLLC (NPI 1639137508, Fremont, MI), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Ferris State College - College Of Optometry, class of 2026
## Record status
- **NPPES last updated:** June 16, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1881539666) · Data from the CMS NPPES public registry.