Mailyn Williams, PA-C, RDMS, RVT
NPI 1457925042 · Physician Assistant · Seattle, WA
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mailyn Williams, PA-C, RDMS, RVT is a Physician Assistant provider in Seattle, WA (NPI 1457925042).
Provider details
- NPI number
- 1457925042
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA-C, RDMS, RVT
- Sex
- Female
- Sole proprietor
- No
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 tenure28% of score
5 yrs in NPPES registry
- Profile completeness28% of score
83% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
99 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Aspiration of Fluid From Chest Cavity Using Imaging Guidance32555 | 51 | $121 |
| Drainage of Fluid From Abdominal Cavity Using Imaging Guidance49083 | 35 | $115 |
| Removal of Tunneled Central Venous Tube36589 | 13 | $144 |
Typical Medicare-allowed amounts for these services range $115–$144 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Registry dates
- Enumerated
- 2021-05-18
- Last updated
- 2021-09-09
- Certified
- 2021-09-09
Frequently asked questions
- What is Mailyn Williams's NPI number?
- Mailyn Williams's National Provider Identifier (NPI) is 1457925042, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mailyn Williams's specialty?
- Mailyn Williams is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Mailyn Williams located?
- Mailyn Williams's practice location on file with NPPES is 4311 11th Ave Ne Ste 200, Seattle, WA 98105-6367.
- What is Mailyn Williams's phone number?
- The practice phone number listed in the NPPES registry for Mailyn Williams is (206) 616-4001.
- Does Mailyn Williams accept Medicare?
- Mailyn Williams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mailyn Williams's NPI active?
- Yes — Mailyn Williams's NPI (1457925042) is active in the NPPES registry as of the last update on 2021-09-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.