2026 NPPES data Pain Medicine Physician NPI 1164427001 MD
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Bryant Leung, MD

Pain Medicine Physician in Riverside, 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 951 in Pain 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
259
Medicare Part D claims · 40 beneficiaries · Pain Medicine Physician avg: 2K
Compiled from official public sources by the PlainDoctor editorial team.

What the federal data shows

Bryant Leung, MD filed 259 Medicare Part D claims in 2023 as a Pain Medicine Physician in Riverside, California.

259
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.

Bryant Leung, MD's Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023, across all CMS prescribers nationally

259 49th percentile higher than 49% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). This entry sits in this band. 400–600: 90,619 prescribers (7%). Above this entry. 600–800: 56,224 prescribers (4%). Above this entry. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2K+: 213,991 prescribers (16%). Above this entry. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

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

Board certification likely (heuristic, not verified)

Bryant Leung, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 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 Bryant Leung, MD?

Quality data not reported

NPI registry status

Active

Issued 06/16/2005

NPI 1164427001

Primary specialty

Pain Medicine Physician

Niche

951 US NPIs in this specialty

Medicare Part D claims

259 88% vs specialty avg

2023 prescription claims

Specialty avg: 2,078

Specialty distribution in California

How Pain Medicine Physician compares to other specialties among California providers

California providers
Behavior Technician - 17.3%Behavior Technician17.3%Marriage & Family Therapist - 5.5%Marriage & Family Therapist5.5%Student in an Organized Health Care Education/Training Program - 5%Student in an Organized Health Care Education/Training Program5%Mental Health Counselor - 3.9%Mental Health Counselor3.9%Pharmacist - 3.5%Pharmacist3.5%Clinical Social Worker - 3.1%Clinical Social Worker3.1%Pain Medicine Physician - 0%Pain Medicine Physician0%
Largest specialties in California (% of in-state 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 Pain Medicine Physician. Verify directly:

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).

Bryant Leung, MD appears in the CMS NPPES registry as a Pain Medicine Physician provider holding MD credentials at 4354 LATHAM ST, Riverside, CA, 92501, with a listed phone of (951) 683-0650. NPI 1164427001 was issued on 06/16/2005. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what Leung most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 259 prescription claims written by this provider, covering 40 Medicare beneficiaries and totaling roughly $5K in drug spend, with an opioid prescribing rate of 44.0%. These figures capture only Medicare Part D, commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

Pain Medicine Physician is a narrow specialty nationwide, with 951 enrolled providers across 49 states and an average of 2,078 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

4354 LATHAM ST
Riverside, CA 92501

Provider Details

NPI 1164427001
Specialty Pain Medicine Physician
Credentials MD
Gender Male
NPI Issued 06/16/2005

Hospital and facility affiliations

Facilities where Bryant Leung, 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.

Newport Care Medical Group Inc
Riverside, 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 Bryant Leung, MD. To verify Bryant Leung, MD'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.

259
Total Claims
$5K
Total Drug Cost
40
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
264
Total Day Supply
7,621
Brand Drug Cost
$0
Generic Drug Cost
$5K
Opioid Claims
114 (44.0% rate)

Patient Demographics

Average Patient Age
68.5 years
Avg HCC Risk Score
1.68
Gender Split
70% female / 30% male
Age Distribution
<65: 15, 65-74: 15, 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 Bryant Leung, MD prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Hydrocodone-Acetaminophen
Hydrocodone/Acetaminophen
91
Gabapentin
44
Diclofenac Sodium
17
Baclofen
16
Duloxetine Hcl
13
Tramadol Hcl
13

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Pain Medicine Physician Overview

How Bryant Leung, MD fits within the Pain Medicine Physician landscape nationally.

951
Pain Medicine Physician Providers in US
49
States with Pain Medicine Physician
2,078
Avg Claims per Provider

Bryant Leung, MD's 259 claims are below the specialty average of 2,078.

Nearby Pain Medicine Physician Providers in California

Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Leung.

Compare Pain 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 California medical board, federal registration is not a license check. Credential verification guide
  • Weigh a second option: compare this provider with a nearby Pain 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.

Frequently Asked Questions

What is Bryant Leung, MD's specialty?
Bryant Leung, MD specializes in Pain Medicine Physician and practices in Riverside, California. Credentials: MD.
How much does Bryant Leung, MD prescribe under Medicare Part D?
In 2023, Bryant Leung, MD wrote 259 Medicare Part D claims totaling $5K in drug costs for 40 beneficiaries.
Where is Bryant Leung, MD located?
Bryant Leung, MD is located at 4354 LATHAM ST, Riverside, CA, 92501. Phone: (951) 683-0650.
What is Bryant Leung, MD's NPI number?
Bryant Leung, MD's National Provider Identifier (NPI) is 1164427001, issued on 06/16/2005.
Does Bryant Leung, MD prescribe opioids?
Yes, Bryant Leung, MD had 114 opioid claims in 2023 with an opioid prescribing rate of 44.0%.
How many Pain Medicine Physician providers are there in the US?
There are 951 Pain Medicine Physician providers across 49 states in the US. The average Pain Medicine Physician provider writes 2,078 Medicare Part D claims per year.
What drugs does Bryant Leung, MD prescribe most often?
Based on 2023 Medicare Part D data, Bryant Leung, MD's most frequently prescribed drugs include Hydrocodone-Acetaminophen, Gabapentin, Diclofenac Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Bryant Leung, MD accept Medicare?
Bryant Leung, MD appears in CMS Medicare data with 259 Part D claims and 40 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Bryant Leung, MD's credentials?
Bryant Leung, MD's NPI is 1164427001 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

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.