NPI registry status
Active
2026 NPPES data Hematology (Internal Medicine) Physician NPI 1326064544 MD
Verify on CMS → Elaine Majerus, MD
Hematology (Internal Medicine) Physician in Saint Louis, Missouri.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 1,436 in Hematology (Internal Medicine) 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
571
Medicare Part D claims · 99 beneficiaries · Hematology (Internal Medicine) Physician avg: 693
Generic prescribing
0%
generic claims · 51% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
79.3/100
▼ 4 pts below national avg 83.1 · Above neutral
Industry payments
$24.7K
22 payments · CMS Open Payments (Sunshine Act)
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
Elaine Majerus, MD reported a CMS MIPS final score of 79.3/100 - below the 83.1 national average - and filed 571 Medicare Part D claims in 2023.
- 79.3/100
- MIPS score · -4 vs avg
- 571
- Part D claims, 2023
- 0%
- generic prescribing
- Likely
- board-certified (heuristic)
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.
Elaine Majerus, MD's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
79 30th percentile higher than 30% 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 Elaine Majerus, MD sits
This provider among hematology (internal medicine) physician peers
Across the 570 hematology (internal medicine) physician providers who report both Medicare Part D prescribing and a MIPS quality score, Elaine Majerus, MD writes more Part D claims than 51% of them and scores higher on MIPS quality than 40% - 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 hematology (internal medicine) physician peer from a representative sample of 60; the gold marker is Elaine Majerus, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Elaine Majerus, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 2 hospital affiliations - 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 Elaine Majerus, MD?
Near national averagePrimary specialty
Hematology (Internal Medicine) Physician
Medicare Part D claims
571 18% vs specialty avg
MIPS final score
79.3/100 3.8 pts vs avg
Specialty distribution in Missouri
How Hematology (Internal Medicine) Physician compares to other specialties among Missouri providers
Medicare quality performance, MIPS
Elaine Majerus, MD's 2023 MIPS final score plotted against the Hematology (Internal Medicine) Physician national average
- MIPS Final Score
- 79.3/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Hematology (Internal Medicine) Physician) - 79.3/100 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).
Elaine Majerus, MD appears in the CMS NPPES registry as a Hematology (Internal Medicine) Physician provider holding MD credentials at 1 BARNES JEWISH HOSPITAL PLZ, Saint Louis, MO, 63110, with a listed phone of (314) 362-7216. NPI 1326064544 was issued on 07/14/2006.
Medicare Part D records for calendar year 2023 show 571 prescription claims written by this provider, covering 99 Medicare beneficiaries and totaling roughly $3.3 million in drug spend, split 51% brand-name and 0% generic by claim count, with an opioid prescribing rate of 11.9%. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 79.3/100 for the 2023 performance year (Quality 71.5, Cost 59.5), compared with the national average of 83.1.
Hematology (Internal Medicine) Physician is a narrow specialty nationwide, with 1,436 enrolled providers across 50 states and an average of 693 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 | 1326064544 |
|---|---|
| Specialty | Hematology (Internal Medicine) Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 07/14/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
79.292
Final Score
Avg: 83.1
71.46
Quality
59.5132
Cost
100
Promoting Interoperability
Reporting: Group practice
Hospital and facility affiliations
Facilities where Elaine Majerus, 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.
Washington University
Saint Louis, MO
Washington University Physicians IN Illinois Inc
Carterville, IL
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Elaine Majerus, MD. Source: openpaymentsdata.cms.gov.
Total received
$24.7K
Largest payer
BioMarin Pharmaceutical Inc.
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
Brand vs generic prescribing mix · Brand-heavy
Elaine Majerus, MD - brand share 51.0%
Hematology (Internal Medicine) Physician average
51% brand-name claims vs 0% generic, on 571 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.
571
Total Claims
$3.3M
Total Drug Cost
99
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 696
- Total Day Supply
- 18,805
- Brand vs Generic
- 51% brand / 0% generic
- Brand Drug Cost
- $3.0M
- Opioid Claims
- 68 (11.9% rate)
Patient Demographics
- Average Patient Age
- 65.1 years
- Avg HCC Risk Score
- 2.83
- Gender Split
- 58% female / 42% male
- Age Distribution
- <65: 30, 65-74: 39, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Elaine Majerus, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Eliquis
Eliquis
73 claims
- Revlimid
Revlimid
70 claims
- Acyclovir
Acyclovir
48 claims
- Xarelto
Xarelto
43 claims
- Hydroxyurea
Hydroxyurea
35 claims
- Warfarin Sodium
Warfarin Sodium
34 claims
- Promacta 27
Promacta
27 claims
- Dexamethasone 18
Dexamethasone
18 claims
| Drug | Claims |
|---|---|
| Eliquis Apixaban | 73 |
| Revlimid Lenalidomide | 70 |
| Acyclovir | 48 |
| Xarelto Rivaroxaban | 43 |
| Hydroxyurea | 35 |
| Warfarin Sodium | 34 |
| Promacta Eltrombopag Olamine | 27 |
| Dexamethasone | 18 |
| Lenalidomide | 15 |
| Tramadol Hcl | 15 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Hematology (Internal Medicine) Physician in MO →
All providers in Missouri →
Compare specialties →
Hematology (Internal Medicine) Physician Overview
How Elaine Majerus, MD fits within the Hematology (Internal Medicine) Physician landscape nationally.
1,436
Hematology (Internal Medicine) Physician Providers in US
50
States with Hematology (Internal Medicine) Physician
693
Avg Claims per Provider
Elaine Majerus, MD's 571 claims are below the specialty average of 693.
Nearby Hematology (Internal Medicine) Physician Providers in Missouri
Other clinicians with the same primary specialty enrolled in Missouri, drawn from the same CMS NPPES roster as Majerus.
Dr. Joseph Bennett
MD
Kansas City, MO
Dr. Paul Gill
M.D.
Springfield, MO
Dr. Anjum Hassan
MD
Saint Louis, MO
Dr. Scot Hickman
MD
Saint Louis, MO
Dr. Gregory Longmore
MD
Saint Louis, MO
Compare Hematology (Internal Medicine) Physician 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 Missouri medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Hematology (Internal Medicine) Physician 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 Missouri
Frequently Asked Questions
What is Elaine Majerus, MD's specialty? ▼
Elaine Majerus, MD specializes in Hematology (Internal Medicine) Physician and practices in Saint Louis, Missouri. Credentials: MD.
How much does Elaine Majerus, MD prescribe under Medicare Part D? ▼
In 2023, Elaine Majerus, MD wrote 571 Medicare Part D claims totaling $3.3M in drug costs for 99 beneficiaries.
What is Elaine Majerus, MD's Medicare quality score? ▼
Elaine Majerus, MD has a CMS MIPS Final Score of 79.3/100 (Quality: 71.5, Cost: 59.5). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Elaine Majerus, MD located? ▼
Elaine Majerus, MD is located at 1 BARNES JEWISH HOSPITAL PLZ, Saint Louis, MO, 63110. Phone: (314) 362-7216.
What is Elaine Majerus, MD's NPI number? ▼
Elaine Majerus, MD's National Provider Identifier (NPI) is 1326064544, issued on 07/14/2006.
Does Elaine Majerus, MD prescribe more brand-name or generic drugs? ▼
Elaine Majerus, MD's prescribing is 51% brand-name and 0% generic drugs by claim count, with $3.0M in brand drug costs.
Does Elaine Majerus, MD prescribe opioids? ▼
Yes, Elaine Majerus, MD had 68 opioid claims in 2023 with an opioid prescribing rate of 11.9%.
How many Hematology (Internal Medicine) Physician providers are there in the US? ▼
There are 1,436 Hematology (Internal Medicine) Physician providers across 50 states in the US. The average Hematology (Internal Medicine) Physician provider writes 693 Medicare Part D claims per year.
What drugs does Elaine Majerus, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Elaine Majerus, MD's most frequently prescribed drugs include Eliquis, Revlimid, Acyclovir. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Elaine Majerus, MD accept Medicare? ▼
Elaine Majerus, MD appears in CMS Medicare data with 571 Part D claims and 99 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Elaine Majerus, MD's credentials? ▼
Elaine Majerus, MD's NPI is 1326064544 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 (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.