NPI registry status
Active
2026 NPPES data Nephrology Physician NPI 1477656858 MD
Verify on CMS → Fionnuala Cormack, MD
Nephrology Physician in Seattle, Washington.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 10,806 in Nephrology Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
1K
Medicare Part D claims · 133 beneficiaries · Nephrology Physician avg: 2K
MIPS score
93.1/100
▲ 10 pts above national avg 83.5 · Exceptional
What the federal data shows
Fionnuala Cormack, MD reported a CMS MIPS final score of 93.1/100 - above the 83.5 national average - and filed 1,172 Medicare Part D claims in 2024.
- 93.1/100
- MIPS score · +10 vs avg
- 1K
- Part D claims, 2024
- Likely
- board-certified (heuristic)
- ≥69th
- pct among measured MIPS (lower-bound band)
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Federal trust snapshot
What official records show about Fionnuala Cormack, MD
Federal records show an active NPI with both Medicare prescribing volume and a measured CMS quality score — objective registry data, not patient reviews.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1477656858), first enumerated 09/07/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 1,172 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
CMS quality reporting (MIPS)
Reported a CMS MIPS final score of 93.1/100 in the Quality Payment Program — a federal quality measure, not a patient review.
Source: CMS Quality Payment Program
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- State context
State board disciplinary context
Washington statewide board action statistics are published annually — these figures describe aggregate state activity, not Fionnuala Cormack, MD's individual license status. Verify directly with the state medical board.
Source: WMC annual report 2023
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1477656858 · Nephrology Physician
NPI-10 · ENUM-LEGACY · TAX-MID · MIPS-ABOVE · RX-MID · BOOK-THIN · PHOTO-FINISH
- NPI-10 1477656858
- ENUM-LEGACY 2006
- TAX-MID 11K Nephrology Physician
- MIPS-ABOVE 93.1/100
- RX-MID 1,172
- BOOK-THIN 206 in Washington
- PHOTO-FINISH Jonathan Himmelfarb · ±0.0
MIPS final-score neighbourhood
Same-specialty nationwide peers by CMS final score, not geographic proximity
- Cormack · this p…
Cormack · this provider
93.1 MIPS pts
- Danyi Zheng · hi…
Danyi Zheng
93.1 MIPS pts
- Jonathan Himmelf…
Jonathan Himmelfarb
93.1 MIPS pts
- Abbal Koirala · …
Abbal Koirala
93.1 MIPS pts
- Sarah Struthers …
Sarah Struthers
93.1 MIPS pts
What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).
Fionnuala Cormack, MD's MIPS score vs every measured U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure. Clinicians whose score CMS assigned without scoring any category are excluded.
93 ≥ 69th percentile 69% of 454,083 measured providers are in lower value bands
Each bar is a band; taller bars hold more measured providers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
The percentile is a conservative whole-score-point band: it counts only measured clinicians in lower score bands. A CMS MIPS metric is not a recommendation or a clinical-quality rating by PlainDoctor. See methodology § corpus placement.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where Fionnuala Cormack, MD sits
This provider among nephrology physician peers
Across the 2,230 nephrology physician providers who report both Medicare Part D prescribing and a MIPS quality score, Fionnuala Cormack, MD writes more Part D claims than 53% of them and scores higher on MIPS quality than 73% - placing this provider in the high-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Each dot is one nephrology physician peer from a representative sample of 60; the gold marker is Fionnuala Cormack, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Fionnuala Cormack, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 1 hospital affiliation - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Fionnuala Cormack, MD?
High performer (top quartile)Primary specialty
Nephrology Physician
Medicare Part D claims
1,172 22% vs specialty avg
MIPS final score
93.1/100 9.6 pts vs avg
Specialty distribution in Washington
How Nephrology Physician compares to other specialties among Washington providers
Medicare quality performance, MIPS
Fionnuala Cormack, MD's 2023 MIPS final score plotted against the Nephrology Physician national average
- MIPS Final Score
- 93.1/100
- vs 83.5 national avg · 2023 performance year
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Practice Address
Provider Details
| NPI | 1477656858 |
|---|---|
| Specialty | Nephrology Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 09/07/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
93.0932
Final Score
Measured-score avg: 83.5
73.9573
Quality
100
Promoting Interoperability
Reporting: Alternative Payment Model
Hospital and facility affiliations
Facilities where Fionnuala Cormack, MD bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
The Association OF University Physicians
Seattle, WA
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
License & disciplinary context - Washington WMC 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~34K Washington medical licensees in 2023 - they are NOT specific to Fionnuala Cormack, MD. To verify Fionnuala Cormack, MD's current license status, search the WMC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
88
Total board actions, Washington 2023
Across 85 cases
2.59
Actions per 1,000 licensees
Washington statewide rate
probation
Most common action type
31 cases
WMC publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Washington disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2024.
1,172
Total Claims
$121K
Total Drug Cost
133
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 2,316.867
- Total Day Supply
- 68,165
- Generic Drug Cost
- $45K
Patient Demographics
- Average Patient Age
- 66.3 years
- Avg HCC Risk Score
- 3.86
- Gender Split
- 45% female / 55% male
- Age Distribution
- <65: 37, 65-74: 69, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Fionnuala Cormack, MD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Chlorthalidone
Chlorthalidone
114 claims
- Potassium Citrate Er
Potassium Citrate Er
85 claims
- Amlodipine Besylate
Amlodipine Besylate
68 claims
- Carvedilol
Carvedilol
51 claims
- Amiloride Hcl
Amiloride Hcl
48 claims
- Olmesartan Medoxomil 43
Olmesartan Medoxomil
43 claims
- Potassium Chloride 41
Potassium Chloride
41 claims
- Lisinopril 36
Lisinopril
36 claims
| Drug | Claims |
|---|---|
| Chlorthalidone | 114 |
| Potassium Citrate Er Potassium Citrate | 85 |
| Amlodipine Besylate | 68 |
| Carvedilol | 51 |
| Amiloride Hcl | 48 |
| Olmesartan Medoxomil | 43 |
| Potassium Chloride | 41 |
| Lisinopril | 36 |
| Jardiance Empagliflozin | 35 |
| Torsemide | 35 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Nephrology Physician Overview
How Fionnuala Cormack, MD fits within the Nephrology Physician landscape nationally.
10,806
Nephrology Physician Providers in US
55
States with Nephrology Physician
1,511
Avg Claims per Provider
Fionnuala Cormack, MD's 1,172 claims are below the specialty average of 1,511.
Nationwide Nephrology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Cormack, both outside Washington so the neighborhoods are not geographic containment.
Similar MIPS final score
Nearest same-specialty clinicians by CMS MIPS final score (93.1 here).
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Nephrology Physician Providers in Washington
Other clinicians with the same primary specialty enrolled in Washington, drawn from the same CMS NPPES roster as Cormack.
One of 206 Nephrology Physician providers enrolled in Washington, 5 are shown here.
Dr. Samer Abdulkhalek
MD
Spokane, WA
Dr. Christine Abrass
MD
Mercer Island, WA
Suhail Ahmad
Seattle, WA
Dr. Razan Al Kudsi
MD
Burien, WA
Dr. Astier Alem
MD
Kirkland, WA
Compare Nephrology Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Fionnuala Cormack, MD's specialty? ▼
Fionnuala Cormack, MD specializes in Nephrology Physician and practices in Seattle, Washington. Credentials: MD.
How much does Fionnuala Cormack, MD prescribe under Medicare Part D? ▼
In 2024, Fionnuala Cormack, MD wrote 1,172 Medicare Part D claims totaling $121K in drug costs for 133 beneficiaries.
What is Fionnuala Cormack, MD's Medicare quality score? ▼
Fionnuala Cormack, MD has a CMS MIPS Final Score of 93.1/100 (Quality: 74). The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Fionnuala Cormack, MD located? ▼
Fionnuala Cormack, MD is located at 325 9TH AVE, Seattle, WA, 98104. Phone: (206) 744-8998.
What is Fionnuala Cormack, MD's NPI number? ▼
Fionnuala Cormack, MD's National Provider Identifier (NPI) is 1477656858, issued on 09/07/2006.
How many Nephrology Physician providers are there in the US? ▼
There are 10,806 Nephrology Physician providers across 55 states in the US. The average Nephrology Physician provider writes 1,511 Medicare Part D claims per year.
What drugs does Fionnuala Cormack, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, Fionnuala Cormack, MD's most frequently prescribed drugs include Chlorthalidone, Potassium Citrate Er, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Fionnuala Cormack, MD accept Medicare? ▼
Fionnuala Cormack, MD appears in CMS Medicare data with 1,172 Part D claims and 133 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Fionnuala Cormack, MD's credentials? ▼
Fionnuala Cormack, MD's NPI is 1477656858 with credentials MD. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2024). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of August 2026 (NPPES) / 2024 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of August 2026.