DR. WILLIAM L OLSON OD
NPI 1427029875
Optometrist in Brockton, MA
About Dr. William L Olson Od NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. WILLIAM L OLSON OD (NPI 1427029875) is an individual optometrist in Brockton, Massachusetts, licensed in Massachusetts (3534) and active in the NPI registry since February 2006. He is enrolled in Medicare PECOS and is a graduate of New England College Of Optometry (1989).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 15
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
Dr. William L Olson 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 Reassignments
3Medicare enrollment records show William Olson reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
North Easton, MA 02356
- Reassigned Medicare billing, Massachusetts enrollment
- 12 clinicians in this Medicare group
Mansfield, MA 02048
- Reassigned Medicare billing, Massachusetts enrollment
- 16 clinicians in this Medicare group
Bellingham, MA 02019
- Reassigned Medicare billing, Massachusetts enrollment
- 10 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 3
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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02301 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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 William Olson's NPI number?
The NPI number for William Olson is 1427029875. It was assigned to this individual provider in the NPPES registry on February 1, 2006.
Where is William Olson located?
William Olson practices at 13 West Street, Brockton, MA 02301. The listed phone number is (508) 583-1066.
What is William Olson's specialty?
The primary specialty registered for this NPI is Optometrist with taxonomy code 152W00000X.
Is William Olson enrolled in Medicare?
Yes. William Olson 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 organizations bill Medicare for William Olson's services?
According to the CMS Revalidation Reassignment List (October 2026 release), William Olson reassigns Medicare benefits to 3 organizations: Easton Vision PC (North Easton, MA), Bay Eye Center PC (Mansfield, MA) and City Eye, LLC (Bellingham, MA). Each 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 William Olson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does William Olson accept?
Health plans from Anthem Blue Cross and Blue Sheld, Anthem Blue Cross and Blue Shield, Blue Cross and Blue Shield of Montana, Blue Cross and Blue Shield of Oklahoma and Blue Cross and Blue Shield of Texas list William Olson 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 William Olson was last updated on October 14, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.
# Dr. William L Olson, OD · NPI 1427029875
Optometrist provider in Brockton, Massachusetts. Individual provider, active in the CMS NPPES registry since February 1, 2006.
## Identity
- **NPI:** 1427029875 (Entity type: Individual)
- **Enumerated:** February 1, 2006
- **Primary specialty:** Optometrist · taxonomy 152W00000X
- **State license:** 3534 (Massachusetts)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 13 WEST STREET, Brockton, MA 02301-3166
- **Phone:** (508) 583-1066 · **Fax:** (508) 580-1423
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): Easton Vision PC (NPI 1942016217, North Easton, MA); Bay Eye Center PC (NPI 1790700946, Mansfield, MA); City Eye, LLC (NPI 1235729559, Bellingham, MA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** New England College Of Optometry, class of 1989
## Record status
- **NPPES last updated:** October 14, 2011
- **Other identifiers:** Other W15854; Other MA3534; Medicare UPIN U08568; and 12 more
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Source: [NPI Profile](https://npiprofile.com/npi/1427029875) · Data from the CMS NPPES public registry.