NPI registry status
Active
2026 NPPES data Nephrology Physician NPI 1184828600 MD
Verify on CMS → Ying Chen, MD
Nephrology 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 10,569 in Nephrology 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
57
Medicare Part D claims · 16 beneficiaries · Nephrology Physician avg: 1K
MIPS score
79.3/100
▼ 4 pts below national avg 83.1 · Above neutral
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Ying Chen, MD reported a CMS MIPS final score of 79.3/100 - below the 83.1 national average - and filed 57 Medicare Part D claims in 2023.
- 79.3/100
- MIPS score · -4 vs avg
- 57
- Part D claims, 2023
- 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.
Ying Chen, 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 Ying Chen, MD sits
This provider among nephrology physician peers
Across the 2,476 nephrology physician providers who report both Medicare Part D prescribing and a MIPS quality score, Ying Chen, MD writes more Part D claims than 4% of them and scores higher on MIPS quality than 43% - placing this provider in the lower-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 nephrology physician peer from a representative sample of 60; the gold marker is Ying Chen, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Ying Chen, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 1 hospital affiliation - 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 Ying Chen, MD?
Near national averagePrimary specialty
Nephrology Physician
Medicare Part D claims
57 96% vs specialty avg
MIPS final score
79.3/100 3.8 pts vs avg
Specialty distribution in Missouri
How Nephrology Physician compares to other specialties among Missouri providers
Medicare quality performance, MIPS
Ying Chen, MD's 2023 MIPS final score plotted against the Nephrology Physician national average
- MIPS Final Score
- 79.3/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Nephrology 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).
Ying Chen, MD appears in the CMS NPPES registry as a Nephrology Physician provider holding MD credentials at 4921 PARKVIEW PL, Saint Louis, MO, 63110, with a listed phone of (314) 362-7603. NPI 1184828600 was issued on 06/11/2007.
Medicare Part D records for calendar year 2023 show 57 prescription claims written by this provider, covering 16 Medicare beneficiaries and totaling roughly $508 in drug spend. 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.
Nephrology Physician is a mid-sized specialty nationwide, with 10,569 enrolled providers across 55 states and an average of 1,454 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 | 1184828600 |
|---|---|
| Specialty | Nephrology Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 06/11/2007 |
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 Ying Chen, 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
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 2023.
57
Total Claims
$508
Total Drug Cost
16
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 117
- Total Day Supply
- 3,402
- Generic Drug Cost
- $505
Patient Demographics
- Average Patient Age
- 74.6 years
- Avg HCC Risk Score
- 1.98
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
| Drug | Claims |
|---|---|
| Vitamin D2 Ergocalciferol (Vitamin D2) | 17 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Nephrology Physician Overview
How Ying Chen, MD fits within the Nephrology Physician landscape nationally.
10,569
Nephrology Physician Providers in US
55
States with Nephrology Physician
1,454
Avg Claims per Provider
Ying Chen, MD's 57 claims are below the specialty average of 1,454.
Nearby Nephrology Physician Providers in Missouri
Other clinicians with the same primary specialty enrolled in Missouri, drawn from the same CMS NPPES roster as Chen.
Dr. Fizza Abbas
MD
Saint Louis, MO
Dr. Christopher Abeid
M.D.
Florissant, MO
Dr. Ahmed Aboul-Magd
M.D.
Joplin, MO
Dr. Nadine Aboul-Magd
M.D.
Joplin, MO
Dr. Asad Al-Rawashdeh
MD
Joplin, MO
Compare Nephrology 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 Nephrology 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.
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Frequently Asked Questions
What is Ying Chen, MD's specialty? ▼
Ying Chen, MD specializes in Nephrology Physician and practices in Saint Louis, Missouri. Credentials: MD.
How much does Ying Chen, MD prescribe under Medicare Part D? ▼
In 2023, Ying Chen, MD wrote 57 Medicare Part D claims totaling $508 in drug costs for 16 beneficiaries.
What is Ying Chen, MD's Medicare quality score? ▼
Ying Chen, 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 Ying Chen, MD located? ▼
Ying Chen, MD is located at 4921 PARKVIEW PL, Saint Louis, MO, 63110. Phone: (314) 362-7603.
What is Ying Chen, MD's NPI number? ▼
Ying Chen, MD's National Provider Identifier (NPI) is 1184828600, issued on 06/11/2007.
How many Nephrology Physician providers are there in the US? ▼
There are 10,569 Nephrology Physician providers across 55 states in the US. The average Nephrology Physician provider writes 1,454 Medicare Part D claims per year.
What drugs does Ying Chen, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Ying Chen, MD's most frequently prescribed drugs include Vitamin D2. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Ying Chen, MD accept Medicare? ▼
Ying Chen, MD appears in CMS Medicare data with 57 Part D claims and 16 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Ying Chen, MD's credentials? ▼
Ying Chen, MD's NPI is 1184828600 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.
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.