Castyn Williams, PA
NPI 1306329776 · Physician Assistant · Grand Rapids, MI
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Castyn Williams, PA is a Physician Assistant provider in Grand Rapids, MI (NPI 1306329776).
Provider details
- NPI number
- 1306329776
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA
- Sex
- Female
- Sole proprietor
- No
- License
- 5601008889 (MI)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
7 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$125 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2018-09-12
- Last updated
- 2023-04-03
- Certified
- 2023-04-03
Frequently asked questions
- What is Castyn Williams's NPI number?
- Castyn Williams's National Provider Identifier (NPI) is 1306329776, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Castyn Williams's specialty?
- Castyn Williams is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Castyn Williams located?
- Castyn Williams's practice location on file with NPPES is 221 Michigan St Ne Ste 300, Grand Rapids, MI 49503-2537.
- What is Castyn Williams's phone number?
- The practice phone number listed in the NPPES registry for Castyn Williams is (616) 459-7258.
- Does Castyn Williams accept Medicare?
- Castyn Williams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Castyn Williams's NPI active?
- Yes — Castyn Williams's NPI (1306329776) is active in the NPPES registry as of the last update on 2023-04-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.