Marianne Yacyshyn, MD
NPI 1184158875 · Neurology Physician · Seattle, WA
Enrolled with Medicare as Practitioner - Neurology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marianne Yacyshyn, MD is a Neurology Physician provider in Seattle, WA (NPI 1184158875).
Provider details
- NPI number
- 1184158875
- Entity type
- Individual
- Primary specialty
- Neurology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- Yes
- License
- MD61140064 (WA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
9 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
279 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) |
|---|---|---|
| Telephone, Internet, Or Electronic Health Record Assessment and Management With Written Report By Consulting Physician, at Least 5 Minutes99451 | 128 | $36 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 44 | $117 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 42 | $169 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 33 | $78 |
| Critical Care, First 30-74 Minutes99291 | 32 | $202 |
Typical Medicare-allowed amounts for these services range $36–$202 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, 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
- 2017-04-19
- Last updated
- 2021-08-10
- Certified
- 2021-08-10
Frequently asked questions
- What is Marianne Yacyshyn's NPI number?
- Marianne Yacyshyn's National Provider Identifier (NPI) is 1184158875, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marianne Yacyshyn's specialty?
- Marianne Yacyshyn is listed in the NPPES registry with a primary specialty of Neurology Physician (Allopathic & Osteopathic Physicians).
- Where is Marianne Yacyshyn located?
- Marianne Yacyshyn's practice location on file with NPPES is 500 17th Ave, Seattle, WA 98122-5711.
- What is Marianne Yacyshyn's phone number?
- The practice phone number listed in the NPPES registry for Marianne Yacyshyn is (206) 320-2800.
- Does Marianne Yacyshyn accept Medicare?
- Marianne Yacyshyn is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marianne Yacyshyn's NPI active?
- Yes — Marianne Yacyshyn's NPI (1184158875) is active in the NPPES registry as of the last update on 2021-08-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.