NPI registry status
Active
2026 NPPES data Family Nurse Practitioner NPI 1790158376 ARNP, DNP
Verify on CMS → Melissa Mossar, ARNP, DNP
Family Nurse Practitioner 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 210,832 in Family Nurse Practitioner, 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
220
Medicare Part D claims · 84 beneficiaries · Family Nurse Practitioner avg: 1K
Generic prescribing
85%
generic claims · 8% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Melissa Mossar, ARNP, DNP filed 220 Medicare Part D claims in 2023 as a Family Nurse Practitioner in Seattle, Washington, prescribing 85% generic.
- 220
- Part D claims, 2023
- 85%
- generic prescribing
- ≥49th
- pct by Part D claim volume (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 Melissa Mossar, ARNP, DNP
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1790158376), first enumerated 11/04/2015.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 220 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- 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 Melissa Mossar, ARNP, DNP'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 1790158376 · Family Nurse Practitioner
NPI-10 · ENUM-MID · TAX-MEGA · RX-LIGHT · BOOK-LIGHT · PHOTO-ENUM
- NPI-10 1790158376
- ENUM-MID 2015
- TAX-MEGA 211K Family Nurse
- RX-LIGHT 220
- BOOK-LIGHT 3,090 in Washington
- PHOTO-ENUM Suby Panichikudiyil · 2015
Melissa Mossar, ARNP, DNP's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
220 ≥ 49th percentile 49% of 1,370,886 prescribers are in lower value bands
Each bar is a band; taller bars hold more prescribers. 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 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2023
What does the federal data show about Melissa Mossar, ARNP, DNP?
Quality data not reportedPrimary specialty
Family Nurse Practitioner
Medicare Part D claims
220 82% vs specialty avg
Specialty distribution in Washington
How Family Nurse Practitioner compares to other specialties among Washington providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Family Nurse Practitioner. Verify directly:
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 | 1790158376 |
|---|---|
| Specialty | Family Nurse Practitioner |
| Credentials | ARNP, DNP |
| Gender | Female |
| NPI Issued | 11/04/2015 |
Hospital and facility affiliations
Facilities where Melissa Mossar, ARNP, DNP 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 Melissa Mossar, ARNP, DNP. To verify Melissa Mossar, ARNP, DNP'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.
Brand vs generic prescribing mix · Generic-heavy
Melissa Mossar, ARNP, DNP - brand share 8.0%
Family Nurse Practitioner average
8% brand-name claims vs 85% generic, on 220 2023 Medicare Part D claims.
The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
220
Total Claims
$14K
Total Drug Cost
84
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 379
- Total Day Supply
- 9,763
- Brand vs Generic
- 8% brand / 85% generic
- Brand Drug Cost
- $7K
- Generic Drug Cost
- $7K
- Antibiotic Claims
- 18
Patient Demographics
- Average Patient Age
- 70.3 years
- Avg HCC Risk Score
- 1.33
- Gender Split
- 69% female / 31% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Melissa Mossar, ARNP, DNP prescribes most
Top Medicare Part D drugs by claim count, 2023
- Diclofenac Sodium
Diclofenac Sodium
12 claims
- Omeprazole
Omeprazole
12 claims
- Paxlovid (Eua)
Paxlovid (Eua)
12 claims
| Drug | Claims |
|---|---|
| Diclofenac Sodium | 12 |
| Omeprazole | 12 |
| Paxlovid (Eua) Nirmatrelvir/Ritonavir | 12 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Family Nurse Practitioner Overview
How Melissa Mossar, ARNP, DNP fits within the Family Nurse Practitioner landscape nationally.
210,832
Family Nurse Practitioner Providers in US
56
States with Family Nurse Practitioner
1,222
Avg Claims per Provider
Melissa Mossar, ARNP, DNP's 220 claims are below the specialty average of 1,222.
Nationwide Family Nurse Practitioner peers with similar MIPS or enrollment year
Two federal-record peer sets for Mossar, both outside Washington so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2015)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Family Nurse Practitioner Providers in Washington
Other clinicians with the same primary specialty enrolled in Washington, drawn from the same CMS NPPES roster as Mossar.
One of 3,090 Family Nurse Practitioner providers enrolled in Washington, 5 are shown here.
Dr. Erin Aas
ARNP
Oak Harbor, WA
Amma Ababio
Sunnyside, WA
Dr. Kimberly Abbey
NP
Bellevue, WA
Dr. Mary Abbott
ARNP, FNP-C
Tacoma, WA
Nurto Abdulla
Seattle, WA
Compare Family Nurse Practitioner nationally: see state-by-state distribution →
Frequently Asked Questions
What is Melissa Mossar, ARNP, DNP's specialty? ▼
Melissa Mossar, ARNP, DNP specializes in Family Nurse Practitioner and practices in Seattle, Washington. Credentials: ARNP, DNP.
How much does Melissa Mossar, ARNP, DNP prescribe under Medicare Part D? ▼
In 2023, Melissa Mossar, ARNP, DNP wrote 220 Medicare Part D claims totaling $14K in drug costs for 84 beneficiaries.
Where is Melissa Mossar, ARNP, DNP located? ▼
Melissa Mossar, ARNP, DNP is located at 1455 NW LEARY WAY STE 250, Seattle, WA, 98107. Phone: (206) 520-5000.
What is Melissa Mossar, ARNP, DNP's NPI number? ▼
Melissa Mossar, ARNP, DNP's National Provider Identifier (NPI) is 1790158376, issued on 11/04/2015.
Does Melissa Mossar, ARNP, DNP prescribe more brand-name or generic drugs? ▼
Melissa Mossar, ARNP, DNP's prescribing is 8% brand-name and 85% generic drugs by claim count, with $7K in brand drug costs.
How many Family Nurse Practitioner providers are there in the US? ▼
There are 210,832 Family Nurse Practitioner providers across 56 states in the US. The average Family Nurse Practitioner provider writes 1,222 Medicare Part D claims per year.
What drugs does Melissa Mossar, ARNP, DNP prescribe most often? ▼
Based on 2023 Medicare Part D data, Melissa Mossar, ARNP, DNP's most frequently prescribed drugs include Diclofenac Sodium, Omeprazole, Paxlovid (Eua). This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Melissa Mossar, ARNP, DNP accept Medicare? ▼
Melissa Mossar, ARNP, DNP appears in CMS Medicare data with 220 Part D claims and 84 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Melissa Mossar, ARNP, DNP's credentials? ▼
Melissa Mossar, ARNP, DNP's NPI is 1790158376 with credentials ARNP, DNP. 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 (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- 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 April 2026 (NPPES) / 2023 (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 May 2026.