NPI registry status
Active
2026 NPPES data Emergency Registered Nurse NPI 1912496068 CRNP
Verify on CMS → Melissa Mason, CRNP
Emergency Registered Nurse in Baltimore, Maryland.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 4,729 in Emergency Registered Nurse, 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
51
Medicare Part D claims · 15 beneficiaries · Emergency Registered Nurse avg: 743
What the federal data shows
Melissa Mason, CRNP filed 51 Medicare Part D claims in 2024 as an Emergency Registered Nurse in Baltimore, Maryland.
- 51
- Part D claims, 2024
- ≥0th
- 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 Mason, CRNP
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 1912496068), first enumerated 05/04/2018.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 51 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
- 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 1912496068 · Emergency Registered Nurse
NPI-10 · ENUM-RECENT · TAX-NARROW · RX-TRACE · BOOK-THIN · PHOTO-ENUM
- NPI-10 1912496068
- ENUM-RECENT 2018
- TAX-NARROW 4,729
- RX-TRACE 51
- BOOK-THIN 54 in Maryland
- PHOTO-ENUM Kristianna Cooper, A… · 2018
Melissa Mason, CRNP's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
51 ≥ 0th percentile 0% of 1,416,883 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 · 2024
What does the federal data show about Melissa Mason, CRNP?
Quality data not reportedPrimary specialty
Emergency Registered Nurse
Medicare Part D claims
51 93% vs specialty avg
Specialty distribution in Maryland
How Emergency Registered Nurse compares to other specialties among Maryland 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 Emergency Registered Nurse. 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 | 1912496068 |
|---|---|
| Specialty | Emergency Registered Nurse |
| Credentials | CRNP |
| Gender | Female |
| NPI Issued | 05/04/2018 |
Hospital and facility affiliations
Facilities where Melissa Mason, CRNP 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.
Johns Hopkins University
Baltimore, MD
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2024.
51
Total Claims
$5K
Total Drug Cost
15
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 57.333
- Total Day Supply
- 1,559
- Generic Drug Cost
- $1K
Patient Demographics
- Average Patient Age
- 69.1 years
- Avg HCC Risk Score
- 1.90
Emergency Registered Nurse Overview
How Melissa Mason, CRNP fits within the Emergency Registered Nurse landscape nationally.
4,729
Emergency Registered Nurse Providers in US
54
States with Emergency Registered Nurse
743
Avg Claims per Provider
Melissa Mason, CRNP's 51 claims are below the specialty average of 743.
Nationwide Emergency Registered Nurse peers with similar MIPS or enrollment year
Two federal-record peer sets for Mason, both outside Maryland so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2018)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Emergency Registered Nurse Providers in Maryland
Other clinicians with the same primary specialty enrolled in Maryland, drawn from the same CMS NPPES roster as Mason.
One of 54 Emergency Registered Nurse providers enrolled in Maryland, 5 are shown here.
Nicole Abrams
WHNP-BC
Baltimore, MD
John Achey
Salisbury, MD
Sandra Barker
Bel Air, MD
Norbert Barrientos
RN
Baltimore, MD
Catherine Boyd
MSN,RN,CEN
Baltimore, MD
Compare Emergency Registered Nurse nationally: see state-by-state distribution →
Frequently Asked Questions
What is Melissa Mason, CRNP's specialty? ▼
Melissa Mason, CRNP specializes in Emergency Registered Nurse and practices in Baltimore, Maryland. Credentials: CRNP.
How much does Melissa Mason, CRNP prescribe under Medicare Part D? ▼
In 2024, Melissa Mason, CRNP wrote 51 Medicare Part D claims totaling $5K in drug costs for 15 beneficiaries.
Where is Melissa Mason, CRNP located? ▼
Melissa Mason, CRNP is located at 601 N CAROLINE ST, Baltimore, MD, 21287. Phone: (251) 401-4697.
What is Melissa Mason, CRNP's NPI number? ▼
Melissa Mason, CRNP's National Provider Identifier (NPI) is 1912496068, issued on 05/04/2018.
How many Emergency Registered Nurse providers are there in the US? ▼
There are 4,729 Emergency Registered Nurse providers across 54 states in the US. The average Emergency Registered Nurse provider writes 743 Medicare Part D claims per year.
Does Melissa Mason, CRNP accept Medicare? ▼
Melissa Mason, CRNP appears in CMS Medicare data with 51 Part D claims and 15 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Melissa Mason, CRNP's credentials? ▼
Melissa Mason, CRNP's NPI is 1912496068 with credentials CRNP. 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.
- 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.