NPI registry status
Active
2026 NPPES data Critical Care Medicine Nurse Practitioner NPI 1447423298 NP
Verify on CMS → Irene Marker, NP
Critical Care Medicine Nurse Practitioner in Beverly Hills, California.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 1,414 in Critical Care Medicine 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
199
Medicare Part D claims · 65 beneficiaries · Critical Care Medicine Nurse Practitioner avg: 426
Generic prescribing
61%
generic claims · 39% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
85.7/100
▲ 3 pts above national avg 83.1 · Above neutral
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Irene Marker, NP reported a CMS MIPS final score of 85.7/100 - above the 83.1 national average - and filed 199 Medicare Part D claims in 2023.
- 85.7/100
- MIPS score · +3 vs avg
- 199
- Part D claims, 2023
- 61%
- generic prescribing
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.
Irene Marker, NP's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
86 49th percentile higher than 49% of 477,587 scored providers
Each bar is a band; taller bars hold more scored 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.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where Irene Marker, NP sits
This provider among critical care medicine nurse practitioner peers
Across the 135 critical care medicine nurse practitioner providers who report both Medicare Part D prescribing and a MIPS quality score, Irene Marker, NP writes more Part D claims than 60% of them and scores higher on MIPS quality than 47% - placing this provider in the high-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Part D claim volume vs MIPS quality, by specialty percentile
Each dot is one critical care medicine nurse practitioner peer from a representative sample of 60; the gold marker is Irene Marker, NP. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
What does the federal data show about Irene Marker, NP?
High performer (top quartile)Primary specialty
Critical Care Medicine Nurse Practitioner
Medicare Part D claims
199 53% vs specialty avg
MIPS final score
85.7/100 2.6 pts vs avg
Specialty distribution in California
How Critical Care Medicine Nurse Practitioner compares to other specialties among California providers
Medicare quality performance, MIPS
Irene Marker, NP's 2023 MIPS final score plotted against the Critical Care Medicine Nurse Practitioner national average
- MIPS Final Score
- 85.7/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Critical Care Medicine Nurse Practitioner) - 85.7/100 vs national avg 83.1
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).
Irene Marker, NP appears in the CMS NPPES registry as a Critical Care Medicine Nurse Practitioner provider holding NP credentials at 8536 WILSHIRE BLVD, Beverly Hills, CA, 90211, with a listed phone of (310) 423-2077. NPI 1447423298 was issued on 04/11/2008.
Medicare Part D records for calendar year 2023 show 199 prescription claims written by this provider, covering 65 Medicare beneficiaries and totaling roughly $197K in drug spend, split 39% brand-name and 61% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 85.7/100 for the 2023 performance year (Quality 85.7, Cost 61.5), compared with the national average of 83.1.
Critical Care Medicine Nurse Practitioner is a narrow specialty nationwide, with 1,414 enrolled providers across 50 states and an average of 426 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline.
Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist, always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.
Practice Address
Provider Details
| NPI | 1447423298 |
|---|---|
| Specialty | Critical Care Medicine Nurse Practitioner |
| Credentials | NP |
| Gender | Female |
| NPI Issued | 04/11/2008 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
85.7185
Final Score
Avg: 83.1
85.6751
Quality
61.479
Cost
100
Promoting Interoperability
Reporting: Group practice
Hospital and facility affiliations
Facilities where Irene Marker, NP 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.
Cedars-Sinai Medical Care Foundation
Beverly Hills, CA
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 - California MBC 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 ~150K California medical licensees in 2023 - they are NOT specific to Irene Marker, NP. To verify Irene Marker, NP's current license status, search the MBC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
576
Total board actions, California 2023
Across 556 cases
3.84
Actions per 1,000 licensees
California statewide rate
probation
Most common action type
186 cases
MBC 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 California disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Above average
Irene Marker, NP - brand share 39.0%
Critical Care Medicine Nurse Practitioner average
39% brand-name claims vs 61% generic, on 199 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.
199
Total Claims
$197K
Total Drug Cost
65
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 417
- Total Day Supply
- 12,366
- Brand vs Generic
- 39% brand / 61% generic
- Brand Drug Cost
- $194K
- Generic Drug Cost
- $3K
Patient Demographics
- Average Patient Age
- 72.4 years
- Avg HCC Risk Score
- 3.07
- Gender Split
- 28% female / 72% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Irene Marker, NP prescribes most
Top Medicare Part D drugs by claim count, 2023
- Entresto
Entresto
31 claims
- Farxiga
Farxiga
18 claims
- Carvedilol
Carvedilol
16 claims
- Spironolactone
Spironolactone
16 claims
- Eliquis 11
Eliquis
11 claims
| Drug | Claims |
|---|---|
| Entresto Sacubitril/Valsartan | 31 |
| Farxiga Dapagliflozin Propanediol | 18 |
| Carvedilol | 16 |
| Spironolactone | 16 |
| Eliquis Apixaban | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Critical Care Medicine Nurse Practitioner in CA →
All providers in California →
Compare specialties →
Critical Care Medicine Nurse Practitioner Overview
How Irene Marker, NP fits within the Critical Care Medicine Nurse Practitioner landscape nationally.
1,414
Critical Care Medicine Nurse Practitioner Providers in US
50
States with Critical Care Medicine Nurse Practitioner
426
Avg Claims per Provider
Irene Marker, NP's 199 claims are below the specialty average of 426.
Nearby Critical Care Medicine Nurse Practitioner Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Marker.
Dr. Daniel Alvarado
FNP
Gridley, CA
Dr. Maria Amos
DNP
San Diego, CA
Maria Amada Apacible
San Francisco, CA
Dr. Jaime Appel
FNP
San Diego, CA
Dr. Susan Araujo
NP, PA
Fresno, CA
Compare Critical Care Medicine Nurse Practitioner nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the California medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Critical Care Medicine Nurse Practitioner peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
Healthcare Guides
Learn more about finding, verifying, and understanding healthcare providers.
How to Find a Doctor
Step-by-step guide to choosing a provider
Verify Credentials
Check NPI, board certification & license status
Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore California
Frequently Asked Questions
What is Irene Marker, NP's specialty? ▼
Irene Marker, NP specializes in Critical Care Medicine Nurse Practitioner and practices in Beverly Hills, California. Credentials: NP.
How much does Irene Marker, NP prescribe under Medicare Part D? ▼
In 2023, Irene Marker, NP wrote 199 Medicare Part D claims totaling $197K in drug costs for 65 beneficiaries.
What is Irene Marker, NP's Medicare quality score? ▼
Irene Marker, NP has a CMS MIPS Final Score of 85.7/100 (Quality: 85.7, Cost: 61.5). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Irene Marker, NP located? ▼
Irene Marker, NP is located at 8536 WILSHIRE BLVD, Beverly Hills, CA, 90211. Phone: (310) 423-2077.
What is Irene Marker, NP's NPI number? ▼
Irene Marker, NP's National Provider Identifier (NPI) is 1447423298, issued on 04/11/2008.
Does Irene Marker, NP prescribe more brand-name or generic drugs? ▼
Irene Marker, NP's prescribing is 39% brand-name and 61% generic drugs by claim count, with $194K in brand drug costs.
How many Critical Care Medicine Nurse Practitioner providers are there in the US? ▼
There are 1,414 Critical Care Medicine Nurse Practitioner providers across 50 states in the US. The average Critical Care Medicine Nurse Practitioner provider writes 426 Medicare Part D claims per year.
What drugs does Irene Marker, NP prescribe most often? ▼
Based on 2023 Medicare Part D data, Irene Marker, NP's most frequently prescribed drugs include Entresto, Farxiga, Carvedilol. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Irene Marker, NP accept Medicare? ▼
Irene Marker, NP appears in CMS Medicare data with 199 Part D claims and 65 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Irene Marker, NP's credentials? ▼
Irene Marker, NP's NPI is 1447423298 with credentials NP. 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.
- 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 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
Compiled from official public sources by the PlainDoctor editorial team.
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.