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2026 NPPES data Pain Medicine (Anesthesiology) Physician NPI 1851832190 MD
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Andrew Nguyen, MD

Pain Medicine (Anesthesiology) 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 4,032 in Pain Medicine (Anesthesiology) 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
2K
Medicare Part D claims · 359 beneficiaries · Pain Medicine (Anesthesiology) Physician avg: 2K
MIPS score
86.2/100
▲ 3 pts above national avg 83.5 · Above neutral
Industry payments
$276.03
4 payments · CMS Open Payments (Sunshine Act)
Verify NPI on CMS Methodology
Compiled from official public sources by the editorial process.

What the federal data shows

Andrew Nguyen, MD reported a CMS MIPS final score of 86.2/100 - above the 83.5 national average - and filed 2,149 Medicare Part D claims in 2023.

86.2/100
MIPS score · +3 vs avg
2K
Part D claims, 2023
Likely
board-certified (heuristic)
≥49th
pct among measured MIPS (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 1851832190 · Pain Medicine (Anesthesiology) Physician

NPI-10 · ENUM-RECENT · TAX-NARROW · MIPS-INLINE · RX-MID · BOOK-THIN · PHOTO-FINISH

  • NPI-10 1851832190
  • ENUM-RECENT 2017
  • TAX-NARROW 4,032
  • MIPS-INLINE 86.2/100
  • RX-MID 2,149
  • BOOK-THIN 414 in California
  • PHOTO-FINISH Kenneth Chapman · ±0.1

MIPS final-score neighbourhood

Same-specialty nationwide peers by CMS final score, not geographic proximity

MIPS pts

What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).

Source CMS Quality Payment Program (MIPS) As of 2023

Andrew Nguyen, MD's MIPS score vs every measured U.S. clinician

CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure. Clinicians whose score CMS assigned without scoring any category are excluded.

86 ≥ 49th percentile 49% of 454,083 measured providers are in lower value bands

0–10: 8,684 measured providers (2%). Below this entry. 10–20: 3,008 measured providers (1%). Below this entry. 20–30: 3,069 measured providers (1%). Below this entry. 30–40: 2,746 measured providers (1%). Below this entry. 40–50: 2,928 measured providers (1%). Below this entry. 50–60: 5,882 measured providers (1%). Below this entry. 60–70: 13,906 measured providers (3%). Below this entry. 70–80: 94,570 measured providers (21%). Below this entry. 80–90: 129,887 measured providers (29%). This entry sits in this band. 90+: 189,403 measured providers (42%). Above this entry. This provider 0 100 every measured MIPS clinician, bucketed by value

Each bar is a band; taller bars hold more measured 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.

The percentile is a conservative whole-score-point band: it counts only measured clinicians in lower score bands. A CMS MIPS metric is not a recommendation or a clinical-quality rating by PlainDoctor. See methodology § corpus placement.

Source CMS Merit-based Incentive Payment System (MIPS) · 2023

Where Andrew Nguyen, MD sits

This provider among pain medicine (anesthesiology) physician peers

Across the 928 pain medicine (anesthesiology) physician providers who report both Medicare Part D prescribing and a MIPS quality score, Andrew Nguyen, MD writes more Part D claims than 71% of them and scores higher on MIPS quality than 59% - placing this provider in the high-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.

Lower volume · High qualityHigh volume · High qualityLower volume · Lower qualityHigh volume · Lower quality0255075100024.148.372.496.6Part D claim volume, percentile in specialtyMIPS quality, percentilePoint, Part D claim volume, percentile in specialty: 90 · MIPS quality, percentile: 27Point, Part D claim volume, percentile in specialty: 0 · MIPS quality, percentile: 73Point, Part D claim volume, percentile in specialty: 63 · MIPS quality, percentile: 43Point, Part D claim volume, percentile in specialty: 27 · MIPS quality, percentile: 70Point, Part D claim volume, percentile in specialty: 2 · MIPS quality, percentile: 18Point, Part D claim volume, percentile in specialty: 55 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 97 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 50 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 13 · MIPS quality, percentile: 17Point, Part D claim volume, percentile in specialty: 65 · MIPS quality, percentile: 63Point, Part D claim volume, percentile in specialty: 7 · MIPS quality, percentile: 20Point, Part D claim volume, percentile in specialty: 75 · MIPS quality, percentile: 42Point, Part D claim volume, percentile in specialty: 72 · MIPS quality, percentile: 37Point, Part D claim volume, percentile in specialty: 15 · MIPS quality, percentile: 30Point, Part D claim volume, percentile in specialty: 35 · MIPS quality, percentile: 45Point, Part D claim volume, percentile in specialty: 12 · MIPS quality, percentile: 92Point, Part D claim volume, percentile in specialty: 48 · MIPS quality, percentile: 82Point, Part D claim volume, percentile in specialty: 60 · MIPS quality, percentile: 62Point, Part D claim volume, percentile in specialty: 45 · MIPS quality, percentile: 55Point, Part D claim volume, percentile in specialty: 38 · MIPS quality, percentile: 22Point, Part D claim volume, percentile in specialty: 37 · MIPS quality, percentile: 23Point, Part D claim volume, percentile in specialty: 78 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 10 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 23 · MIPS quality, percentile: 47Point, Part D claim volume, percentile in specialty: 98 · MIPS quality, percentile: 80Point, Part D claim volume, percentile in specialty: 57 · MIPS quality, percentile: 58Point, Part D claim volume, percentile in specialty: 28 · MIPS quality, percentile: 87Point, Part D claim volume, percentile in specialty: 70 · MIPS quality, percentile: 60Point, Part D claim volume, percentile in specialty: 87 · MIPS quality, percentile: 92Point, Part D claim volume, percentile in specialty: 8 · MIPS quality, percentile: 32Point, Part D claim volume, percentile in specialty: 20 · MIPS quality, percentile: 35Point, Part D claim volume, percentile in specialty: 47 · MIPS quality, percentile: 77Point, Part D claim volume, percentile in specialty: 32 · MIPS quality, percentile: 68Point, Part D claim volume, percentile in specialty: 60 · MIPS quality, percentile: 38Point, Part D claim volume, percentile in specialty: 93 · MIPS quality, percentile: 48Point, Part D claim volume, percentile in specialty: 30 · MIPS quality, percentile: 78Point, Part D claim volume, percentile in specialty: 95 · MIPS quality, percentile: 13Point, Part D claim volume, percentile in specialty: 25 · MIPS quality, percentile: 92Point, Part D claim volume, percentile in specialty: 88 · MIPS quality, percentile: 15Point, Part D claim volume, percentile in specialty: 33 · MIPS quality, percentile: 25Point, Part D claim volume, percentile in specialty: 58 · MIPS quality, percentile: 83Point, Part D claim volume, percentile in specialty: 82 · MIPS quality, percentile: 50Point, Part D claim volume, percentile in specialty: 5 · MIPS quality, percentile: 92Point, Part D claim volume, percentile in specialty: 52 · MIPS quality, percentile: 33Point, Part D claim volume, percentile in specialty: 73 · MIPS quality, percentile: 53Point, Part D claim volume, percentile in specialty: 83 · MIPS quality, percentile: 28Point, Part D claim volume, percentile in specialty: 43 · MIPS quality, percentile: 72Point, Part D claim volume, percentile in specialty: 3 · MIPS quality, percentile: 73Point, Part D claim volume, percentile in specialty: 53 · MIPS quality, percentile: 52Point, Part D claim volume, percentile in specialty: 67 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 92 · MIPS quality, percentile: 92Point, Part D claim volume, percentile in specialty: 85 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 40 · MIPS quality, percentile: 67Point, Part D claim volume, percentile in specialty: 18 · MIPS quality, percentile: 88Point, Part D claim volume, percentile in specialty: 100 · MIPS quality, percentile: 92Point, Part D claim volume, percentile in specialty: 68 · MIPS quality, percentile: 40Point, Part D claim volume, percentile in specialty: 17 · MIPS quality, percentile: 65Point, Part D claim volume, percentile in specialty: 42 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 22 · MIPS quality, percentile: 85Point, Part D claim volume, percentile in specialty: 80 · MIPS quality, percentile: 90Andrew Nguyen, MD, Part D claim volume, percentile in specialty: 71 · MIPS quality, percentile: 59
Part D claim volume vs MIPS quality, by specialty percentile

Each dot is one pain medicine (anesthesiology) physician peer from a representative sample of 60; the gold marker is Andrew Nguyen, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.

✓
Board certification likely (heuristic, not verified)

Andrew Nguyen, 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 Andrew Nguyen, MD?

High performer (top quartile)

NPI registry status

Active

Issued 03/20/2017

NPI 1851832190

Primary specialty

Pain Medicine (Anesthesiology) Physician

Niche

4,032 US NPIs in this specialty

Medicare Part D claims

2,149 30% vs specialty avg

2023 prescription claims

Specialty avg: 1,657

MIPS final score

86.2/100 2.7 pts vs avg

Above neutral band

vs 83.5 national avg

Specialty distribution in California

How Pain Medicine (Anesthesiology) Physician compares to other specialties among California providers

California providers
Behavior Technician17.3%Marriage & Family Therapist5.5%Student in an Organized Heal…5%Mental Health Counselor3.9%Pharmacist3.5%Clinical Social Worker3.1%Pain Medicine (Anesthesiolog…0%
Largest specialties in California (% of in-state providers)

Medicare quality performance, MIPS

Andrew Nguyen, MD's 2023 MIPS final score plotted against the Pain Medicine (Anesthesiology) Physician national average

High performer (top quartile)
MIPS Final Score
86.2/100
vs 83.5 national avg · 2023 performance year
0%100%National avg84%86.2%
MIPS final score (Pain Medicine (Anesthesiology) Physician) - 86.2/100 vs national avg 83.5
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

2051 MARENGO STREET
Los Angeles, CA 90033
(323) 409-7748

Provider Details

NPI 1851832190
Specialty Pain Medicine (Anesthesiology) Physician
Credentials MD
Gender Male
NPI Issued 03/20/2017

CMS Quality Score (MIPS)

Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.

86.2292
Final Score
Measured-score avg: 83.5
86.2077
Quality
53.932
Cost
91
Promoting Interoperability

Reporting: Group practice

Hospital and facility affiliations

Facilities where Andrew Nguyen, 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.

Socal Anesthesia Solutions Inc
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 Andrew Nguyen, MD. Source: openpaymentsdata.cms.gov.

Total received

$276

Largest payer

Boston Scientific Corporation

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 Andrew Nguyen, MD. To verify Andrew Nguyen, 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.

2,149
Total Claims
$99K
Total Drug Cost
359
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
2,556
Total Day Supply
71,190
Generic Drug Cost
$65K
Opioid Claims
640 (29.8% rate)

Patient Demographics

Average Patient Age
70.9 years
Avg HCC Risk Score
1.90
Gender Split
63% female / 37% male
Age Distribution
<65: 64, 65-74: 179, 75-84: 92, 85+: 24

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

What Andrew Nguyen, 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
297
Gabapentin
 272
Tizanidine Hcl
 250
Meloxicam
 248
Celecoxib
 120
Tramadol Hcl
 110
Pregabalin
 109
Methocarbamol
 86
Duloxetine Hcl
 81
Oxycodone-Acetaminophen
Oxycodone Hcl/Acetaminophen
67

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

More Pain Medicine (Anesthesiology) Physician in CA → All providers in California → Compare specialties →

Pain Medicine (Anesthesiology) Physician Overview

How Andrew Nguyen, MD fits within the Pain Medicine (Anesthesiology) Physician landscape nationally.

4,032
Pain Medicine (Anesthesiology) Physician Providers in US
53
States with Pain Medicine (Anesthesiology) Physician
1,657
Avg Claims per Provider

Andrew Nguyen, MD's 2,149 claims are above the specialty average of 1,657.

Nationwide Pain Medicine (Anesthesiology) Physician peers with similar MIPS or enrollment year

Two federal-record peer sets for Nguyen, both outside California so the neighborhoods are not geographic containment.

Similar MIPS final score

Nearest same-specialty clinicians by CMS MIPS final score (86.2 here).

Kenneth Chapman 86.3 NY Brian Parks 86.4 TX Jeffrey Welch 86.1 WA Hyo Ji 86.4 GU

Same NPPES enumeration year (2017)

Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.

Paul Lesko Knoxville, TN Sagar Patel Lewistown, PA Ravi Shah Philadelphia, PA Dustin Duracher Gulfport, MS

Nearby Pain Medicine (Anesthesiology) Physician Providers in California

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

One of 414 Pain Medicine (Anesthesiology) Physician providers enrolled in California, 5 are shown here.

Dr. Shahram Abbassi
MD
Arcata, CA
Dr. Chris Abrecht
M.D.
San Francisco, CA
Dr. Rishi Agarwal
M.D.
Pasadena, CA
Dr. Bashar Ahmed
M.D.
Santa Rosa, CA
Dr. Jane Ahn
M.D.
Stanford, CA

Compare Pain Medicine (Anesthesiology) Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is Andrew Nguyen, MD's specialty? ▼
Andrew Nguyen, MD specializes in Pain Medicine (Anesthesiology) Physician and practices in Los Angeles, California. Credentials: MD.
How much does Andrew Nguyen, MD prescribe under Medicare Part D? ▼
In 2023, Andrew Nguyen, MD wrote 2,149 Medicare Part D claims totaling $99K in drug costs for 359 beneficiaries.
What is Andrew Nguyen, MD's Medicare quality score? ▼
Andrew Nguyen, MD has a CMS MIPS Final Score of 86.2/100 (Quality: 86.2, Cost: 53.9). The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Andrew Nguyen, MD located? ▼
Andrew Nguyen, MD is located at 2051 MARENGO STREET, Los Angeles, CA, 90033. Phone: (323) 409-7748.
What is Andrew Nguyen, MD's NPI number? ▼
Andrew Nguyen, MD's National Provider Identifier (NPI) is 1851832190, issued on 03/20/2017.
Does Andrew Nguyen, MD prescribe opioids? ▼
Yes, Andrew Nguyen, MD had 640 opioid claims in 2023 with an opioid prescribing rate of 29.8%.
How many Pain Medicine (Anesthesiology) Physician providers are there in the US? ▼
There are 4,032 Pain Medicine (Anesthesiology) Physician providers across 53 states in the US. The average Pain Medicine (Anesthesiology) Physician provider writes 1,657 Medicare Part D claims per year.
What drugs does Andrew Nguyen, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Andrew Nguyen, MD's most frequently prescribed drugs include Hydrocodone-Acetaminophen, Gabapentin, Tizanidine Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Andrew Nguyen, MD accept Medicare? ▼
Andrew Nguyen, MD appears in CMS Medicare data with 2,149 Part D claims and 359 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Andrew Nguyen, MD's credentials? ▼
Andrew Nguyen, MD's NPI is 1851832190 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 editorial process.

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.