NPI registry status
Active
2026 NPPES data Optician NPI 1619433745
Verify on CMS → Carmen Yu
Optician in Antioch, 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 6,693 in Optician, 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
27
Medicare Part D claims · 22 beneficiaries · Optician avg: 332
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Carmen Yu filed 27 Medicare Part D claims in 2023 as a Optician in Antioch, California.
- 27
- Part D claims, 2023
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.
Carmen Yu's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
27 0th percentile higher than 0% of 1,370,886 prescribers
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.
Source CMS Medicare Part D Prescriber Public Use File · 2023
What does the federal data show about Carmen Yu?
Quality data not reportedPrimary specialty
Optician
Medicare Part D claims
27 92% vs specialty avg
Specialty distribution in California
How Optician compares to other specialties among California 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 Optician. 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).
Carmen Yu appears in the CMS NPPES registry as an Optician provider at 4893 LONE TREE WAY, Antioch, CA, 94531, with a listed phone of (925) 978-0615. NPI 1619433745 was issued on 02/13/2019.
Medicare Part D records for calendar year 2023 show 27 prescription claims written by this provider, covering 22 Medicare beneficiaries and totaling roughly $1K in drug spend.
Optician is a mid-sized specialty nationwide, with 6,693 enrolled providers across 52 states and an average of 332 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 | 1619433745 |
|---|---|
| Specialty | Optician |
| Gender | Female |
| NPI Issued | 02/13/2019 |
Hospital and facility affiliations
Facilities where Carmen Yu 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.
Permanente Medical Group Inc
Antioch, 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 Carmen Yu. To verify Carmen Yu'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.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
27
Total Claims
$1K
Total Drug Cost
22
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 40
- Total Day Supply
- 1,100
- Generic Drug Cost
- $293
Patient Demographics
- Average Patient Age
- 74.3 years
- Avg HCC Risk Score
- 1.33
Optician Overview
How Carmen Yu fits within the Optician landscape nationally.
6,693
Optician Providers in US
52
States with Optician
332
Avg Claims per Provider
Carmen Yu's 27 claims are below the specialty average of 332.
Nearby Optician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Yu.
Dr. Tomasita Abesamis
R.D.O.
Los Angeles, CA
Dr. Bushra Abraham
OPTICIAN
Torrance, CA
Dr. Manuel Acevedo
OPTICIAN
Sanger, CA
Kimberly Acosta
Montebello, CA
Dr. Jeanine Adams
A.B.O.C.,R.D.O.
Mountain View, CA
Compare Optician 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 Optician 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
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How to Find a Doctor
Step-by-step guide to choosing a provider
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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 Carmen Yu's specialty? ▼
Carmen Yu specializes in Optician and practices in Antioch, California.
How much does Carmen Yu prescribe under Medicare Part D? ▼
In 2023, Carmen Yu wrote 27 Medicare Part D claims totaling $1K in drug costs for 22 beneficiaries.
Where is Carmen Yu located? ▼
Carmen Yu is located at 4893 LONE TREE WAY, Antioch, CA, 94531. Phone: (925) 978-0615.
What is Carmen Yu's NPI number? ▼
Carmen Yu's National Provider Identifier (NPI) is 1619433745, issued on 02/13/2019.
How many Optician providers are there in the US? ▼
There are 6,693 Optician providers across 52 states in the US. The average Optician provider writes 332 Medicare Part D claims per year.
Does Carmen Yu accept Medicare? ▼
Carmen Yu appears in CMS Medicare data with 27 Part D claims and 22 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Carmen Yu's credentials? ▼
Carmen Yu's NPI is 1619433745. 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
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.