NPI registry status
Active
2026 NPPES data Geriatric Psychiatry Physician NPI 1114941382 M.D.
Verify on CMS → Stephen Chen, M.D.
Geriatric Psychiatry Physician in Los Angeles, 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 785 in Geriatric Psychiatry 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
274
Medicare Part D claims · 66 beneficiaries · Geriatric Psychiatry Physician avg: 2K
MIPS score
91.7/100
▲ 9 pts above national avg 83.1 · Exceptional
Industry payments
$1.6K
11 payments · CMS Open Payments (Sunshine Act)
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Stephen Chen, M.D. reported a CMS MIPS final score of 91.7/100 - above the 83.1 national average - and filed 274 Medicare Part D claims in 2023.
- 91.7/100
- MIPS score · +9 vs avg
- 274
- 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.
Stephen Chen, M.D.'s MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
92 Top 37% higher than 63% 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 Stephen Chen, M.D. sits
This provider among geriatric psychiatry physician peers
Across the 114 geriatric psychiatry physician providers who report both Medicare Part D prescribing and a MIPS quality score, Stephen Chen, M.D. writes more Part D claims than 29% of them and scores higher on MIPS quality than 66% - placing this provider in the lower-volume, high-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 geriatric psychiatry physician peer from a representative sample of 60; the gold marker is Stephen Chen, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Stephen Chen, M.D. 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 Stephen Chen, M.D.?
High performer (top quartile)Primary specialty
Geriatric Psychiatry Physician
Medicare Part D claims
274 83% vs specialty avg
MIPS final score
91.7/100 8.6 pts vs avg
Specialty distribution in California
How Geriatric Psychiatry Physician compares to other specialties among California providers
Medicare quality performance, MIPS
Stephen Chen, M.D.'s 2023 MIPS final score plotted against the Geriatric Psychiatry Physician national average
- MIPS Final Score
- 91.7/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Geriatric Psychiatry Physician) - 91.7/100 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).
Stephen Chen, M.D. appears in the CMS NPPES registry as a Geriatric Psychiatry Physician provider holding M.D. credentials at 300 UCLA MEDICAL PLZ STE 2408, Los Angeles, CA, 90095, with a listed phone of (310) 825-8625. NPI 1114941382 was issued on 07/27/2006.
Medicare Part D records for calendar year 2023 show 274 prescription claims written by this provider, covering 66 Medicare beneficiaries and totaling roughly $10K in drug spend. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 91.7/100 for the 2023 performance year (Quality 70.8), compared with the national average of 83.1.
Geriatric Psychiatry Physician is a narrow specialty nationwide, with 785 enrolled providers across 46 states and an average of 1,586 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 | 1114941382 |
|---|---|
| Specialty | Geriatric Psychiatry Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 07/27/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
91.7046
Final Score
Avg: 83.1
70.7752
Quality
100
Promoting Interoperability
Reporting: Group practice
Hospital and facility affiliations
Facilities where Stephen Chen, M.D. 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.
UC Regents
Los Angeles, 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).
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 Stephen Chen, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$1.6K
Largest payer
AstraZeneca Pharmaceuticals LP
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.
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 Stephen Chen, M.D.. To verify Stephen Chen, M.D.'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.
274
Total Claims
$10K
Total Drug Cost
66
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 375
- Total Day Supply
- 10,019
- Generic Drug Cost
- $6K
Patient Demographics
- Average Patient Age
- 75.3 years
- Avg HCC Risk Score
- 2.04
- Gender Split
- 64% female / 36% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Stephen Chen, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Trazodone Hcl
Trazodone Hcl
28 claims
- Venlafaxine Hcl Er
Venlafaxine Hcl Er
17 claims
- Quetiapine Fumarate
Quetiapine Fumarate
16 claims
- Gabapentin
Gabapentin
15 claims
- Donepezil Hcl 11
Donepezil Hcl
11 claims
- Sertraline Hcl 11
Sertraline Hcl
11 claims
| Drug | Claims |
|---|---|
| Trazodone Hcl | 28 |
| Venlafaxine Hcl Er Venlafaxine Hcl | 17 |
| Quetiapine Fumarate | 16 |
| Gabapentin | 15 |
| Donepezil Hcl | 11 |
| Sertraline Hcl | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Geriatric Psychiatry Physician Overview
How Stephen Chen, M.D. fits within the Geriatric Psychiatry Physician landscape nationally.
785
Geriatric Psychiatry Physician Providers in US
46
States with Geriatric Psychiatry Physician
1,586
Avg Claims per Provider
Stephen Chen, M.D.'s 274 claims are below the specialty average of 1,586.
Nearby Geriatric Psychiatry Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Chen.
Dr. Kotra Ajir
MD
Los Angeles, CA
Richard Almond
Palo Alto, CA
Lydia Ann
Orange, CA
Dr. Jasdeep Aulakh
M.D.
Patton, CA
Dr. Abes Bagheri
M.D.
Los Alamitos, CA
Compare Geriatric Psychiatry 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 California medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Geriatric Psychiatry 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 California
Frequently Asked Questions
What is Stephen Chen, M.D.'s specialty? ▼
Stephen Chen, M.D. specializes in Geriatric Psychiatry Physician and practices in Los Angeles, California. Credentials: M.D..
How much does Stephen Chen, M.D. prescribe under Medicare Part D? ▼
In 2023, Stephen Chen, M.D. wrote 274 Medicare Part D claims totaling $10K in drug costs for 66 beneficiaries.
What is Stephen Chen, M.D.'s Medicare quality score? ▼
Stephen Chen, M.D. has a CMS MIPS Final Score of 91.7/100 (Quality: 70.8). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Stephen Chen, M.D. located? ▼
Stephen Chen, M.D. is located at 300 UCLA MEDICAL PLZ STE 2408, Los Angeles, CA, 90095. Phone: (310) 825-8625.
What is Stephen Chen, M.D.'s NPI number? ▼
Stephen Chen, M.D.'s National Provider Identifier (NPI) is 1114941382, issued on 07/27/2006.
How many Geriatric Psychiatry Physician providers are there in the US? ▼
There are 785 Geriatric Psychiatry Physician providers across 46 states in the US. The average Geriatric Psychiatry Physician provider writes 1,586 Medicare Part D claims per year.
What drugs does Stephen Chen, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Stephen Chen, M.D.'s most frequently prescribed drugs include Trazodone Hcl, Venlafaxine Hcl Er, Quetiapine Fumarate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Stephen Chen, M.D. accept Medicare? ▼
Stephen Chen, M.D. appears in CMS Medicare data with 274 Part D claims and 66 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Stephen Chen, M.D.'s credentials? ▼
Stephen Chen, M.D.'s NPI is 1114941382 with credentials M.D.. 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.