NPI registry status
Active
2026 NPPES data Student in an Organized Health Care Education/Training Program NPI 1104566165 MD/PHD
Verify on CMS → Maria Ly, MD/PHD
Student in an Organized Health Care Education/Training Program 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 331,274 in Student in an Organized Health Care Education/Training Program, 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
26
Medicare Part D claims · 12 beneficiaries · Student in an Organized Health Care Education/Training Program avg: 459
What the federal data shows
Maria Ly, MD/PHD filed 26 Medicare Part D claims in 2023 as a Student in an Organized Health Care Education/Training Program in Saint Louis, Missouri.
- 26
- Part D claims, 2023
- ≥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.
CMS NPPES provider registry desk
NPI 1104566165 · Student in an Organized Health Care Education/Training Program
NPI-10 · ENUM-RECENT · TAX-MEGA · RX-TRACE · BOOK-LIGHT · PHOTO-ENUM
- NPI-10 1104566165
- ENUM-RECENT 2022
- TAX-MEGA 331K Student in
- RX-TRACE 26
- BOOK-LIGHT 4,007 in Missouri
- PHOTO-ENUM Luke Pettet · 2022
Maria Ly, MD/PHD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
26 ≥ 0th percentile 0% 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 Maria Ly, MD/PHD?
Quality data not reportedPrimary specialty
Student in an Organized Health Care Education/Training Program
Medicare Part D claims
26 94% vs specialty avg
Specialty distribution in Missouri
How Student in an Organized Health Care Education/Training Program compares to other specialties among Missouri 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 Student in an Organized Health Care Education/Training Program. 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 | 1104566165 |
|---|---|
| Specialty | Student in an Organized Health Care Education/Training Program |
| Credentials | MD/PHD |
| Gender | Female |
| NPI Issued | 03/29/2022 |
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
26
Total Claims
$3K
Total Drug Cost
12
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 30
- Total Day Supply
- 575
- Generic Drug Cost
- $145
Patient Demographics
- Average Patient Age
- 66.2 years
- Avg HCC Risk Score
- 3.24
More Student in an Organized Health Care Education/Training Program in MO →
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Student in an Organized Health Care Education/Training Program Overview
How Maria Ly, MD/PHD fits within the Student in an Organized Health Care Education/Training Program landscape nationally.
331,274
Student in an Organized Health Care Education/Training Program Providers in US
55
States with Student in an Organized Health Care Education/Training Program
459
Avg Claims per Provider
Maria Ly, MD/PHD's 26 claims are below the specialty average of 459.
Nationwide Student in an Organized Health Care Education/Training Program peers with similar MIPS or enrollment year
Two federal-record peer sets for Ly, both outside Missouri so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2022)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Student in an Organized Health Care Education/Training Program Providers in Missouri
Other clinicians with the same primary specialty enrolled in Missouri, drawn from the same CMS NPPES roster as Ly.
One of 4,007 Student in an Organized Health Care Education/Training Program providers enrolled in Missouri, 5 are shown here.
Frequently Asked Questions
What is Maria Ly, MD/PHD's specialty? ▼
Maria Ly, MD/PHD specializes in Student in an Organized Health Care Education/Training Program and practices in Saint Louis, Missouri. Credentials: MD/PHD.
How much does Maria Ly, MD/PHD prescribe under Medicare Part D? ▼
In 2023, Maria Ly, MD/PHD wrote 26 Medicare Part D claims totaling $3K in drug costs for 12 beneficiaries.
Where is Maria Ly, MD/PHD located? ▼
Maria Ly, MD/PHD is located at 1 BARNES JEW HOSP PLZ, Saint Louis, MO, 63110. Phone: (314) 747-3000.
What is Maria Ly, MD/PHD's NPI number? ▼
Maria Ly, MD/PHD's National Provider Identifier (NPI) is 1104566165, issued on 03/29/2022.
How many Student in an Organized Health Care Education/Training Program providers are there in the US? ▼
There are 331,274 Student in an Organized Health Care Education/Training Program providers across 55 states in the US. The average Student in an Organized Health Care Education/Training Program provider writes 459 Medicare Part D claims per year.
Does Maria Ly, MD/PHD accept Medicare? ▼
Maria Ly, MD/PHD appears in CMS Medicare data with 26 Part D claims and 12 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Maria Ly, MD/PHD's credentials? ▼
Maria Ly, MD/PHD's NPI is 1104566165 with credentials MD/PHD. 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.