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2026 NPPES data Emergency Medicine Physician NPI 1538553755
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Stephen Villa

Emergency Medicine 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 64,463 in Emergency 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
65
Medicare Part D claims · 35 beneficiaries · Emergency Medicine Physician avg: 352
MIPS score
100/100
▲ 17 pts above national avg 83.5 · Exceptional
Verify NPI on CMS Methodology
Compiled from official public sources by the editorial process.

What the federal data shows

Stephen Villa reported a CMS MIPS final score of 100/100 - above the 83.5 national average - and filed 65 Medicare Part D claims in 2023.

100/100
MIPS score · +17 vs avg
65
Part D claims, 2023
Likely
board-certified (heuristic)
≥92nd
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 1538553755 · Emergency Medicine Physician

NPI-10 · ENUM-MID · TAX-MEGA · MIPS-ELITE · RX-TRACE · BOOK-MID · PHOTO-FINISH

  • NPI-10 1538553755
  • ENUM-MID 2015
  • TAX-MEGA 64K Emergency Medicine
  • MIPS-ELITE 100/100
  • RX-TRACE 65
  • BOOK-MID 6,965 in California
  • PHOTO-FINISH Josyann Abisaab · ±0.0

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

Stephen Villa'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.

100 ≥ 92nd percentile 92% 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%). Below this entry. 90+: 189,403 measured providers (42%). This entry sits in this band. 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 Stephen Villa sits

This provider among emergency medicine physician peers

Across the 14,017 emergency medicine physician providers who report both Medicare Part D prescribing and a MIPS quality score, Stephen Villa writes more Part D claims than 23% of them and scores higher on MIPS quality than 91% - placing this provider in the lower-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 quality0255075100024.949.974.899.8Part D claim volume, percentile in specialtyMIPS quality, percentilePoint, Part D claim volume, percentile in specialty: 77 · MIPS quality, percentile: 7Point, Part D claim volume, percentile in specialty: 63 · MIPS quality, percentile: 58Point, Part D claim volume, percentile in specialty: 90 · MIPS quality, percentile: 30Point, Part D claim volume, percentile in specialty: 68 · MIPS quality, percentile: 62Point, Part D claim volume, percentile in specialty: 97 · MIPS quality, percentile: 8Point, Part D claim volume, percentile in specialty: 65 · MIPS quality, percentile: 12Point, Part D claim volume, percentile in specialty: 35 · MIPS quality, percentile: 65Point, Part D claim volume, percentile in specialty: 62 · MIPS quality, percentile: 57Point, Part D claim volume, percentile in specialty: 70 · MIPS quality, percentile: 3Point, Part D claim volume, percentile in specialty: 43 · MIPS quality, percentile: 93Point, Part D claim volume, percentile in specialty: 12 · MIPS quality, percentile: 87Point, Part D claim volume, percentile in specialty: 55 · MIPS quality, percentile: 47Point, Part D claim volume, percentile in specialty: 83 · MIPS quality, percentile: 53Point, Part D claim volume, percentile in specialty: 93 · MIPS quality, percentile: 32Point, Part D claim volume, percentile in specialty: 5 · MIPS quality, percentile: 82Point, Part D claim volume, percentile in specialty: 7 · MIPS quality, percentile: 2Point, Part D claim volume, percentile in specialty: 92 · MIPS quality, percentile: 23Point, Part D claim volume, percentile in specialty: 33 · MIPS quality, percentile: 25Point, Part D claim volume, percentile in specialty: 0 · MIPS quality, percentile: 13Point, Part D claim volume, percentile in specialty: 13 · MIPS quality, percentile: 47Point, Part D claim volume, percentile in specialty: 17 · MIPS quality, percentile: 68Point, Part D claim volume, percentile in specialty: 17 · MIPS quality, percentile: 27Point, Part D claim volume, percentile in specialty: 10 · MIPS quality, percentile: 90Point, Part D claim volume, percentile in specialty: 45 · MIPS quality, percentile: 28Point, Part D claim volume, percentile in specialty: 87 · MIPS quality, percentile: 15Point, Part D claim volume, percentile in specialty: 95 · MIPS quality, percentile: 22Point, Part D claim volume, percentile in specialty: 23 · MIPS quality, percentile: 43Point, Part D claim volume, percentile in specialty: 48 · MIPS quality, percentile: 37Point, Part D claim volume, percentile in specialty: 72 · MIPS quality, percentile: 70Point, Part D claim volume, percentile in specialty: 25 · MIPS quality, percentile: 35Point, Part D claim volume, percentile in specialty: 82 · MIPS quality, percentile: 70Point, Part D claim volume, percentile in specialty: 88 · MIPS quality, percentile: 10Point, Part D claim volume, percentile in specialty: 27 · MIPS quality, percentile: 77Point, Part D claim volume, percentile in specialty: 0 · MIPS quality, percentile: 17Point, Part D claim volume, percentile in specialty: 52 · MIPS quality, percentile: 78Point, Part D claim volume, percentile in specialty: 57 · MIPS quality, percentile: 70Point, Part D claim volume, percentile in specialty: 100 · MIPS quality, percentile: 92Point, Part D claim volume, percentile in specialty: 85 · MIPS quality, percentile: 95Point, Part D claim volume, percentile in specialty: 40 · MIPS quality, percentile: 78Point, Part D claim volume, percentile in specialty: 58 · MIPS quality, percentile: 60Point, Part D claim volume, percentile in specialty: 22 · MIPS quality, percentile: 5Point, Part D claim volume, percentile in specialty: 32 · MIPS quality, percentile: 83Point, Part D claim volume, percentile in specialty: 42 · MIPS quality, percentile: 95Point, Part D claim volume, percentile in specialty: 15 · MIPS quality, percentile: 45Point, Part D claim volume, percentile in specialty: 3 · MIPS quality, percentile: 17Point, Part D claim volume, percentile in specialty: 77 · MIPS quality, percentile: 38Point, Part D claim volume, percentile in specialty: 65 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 30 · MIPS quality, percentile: 50Point, Part D claim volume, percentile in specialty: 72 · MIPS quality, percentile: 38Point, Part D claim volume, percentile in specialty: 80 · MIPS quality, percentile: 65Point, Part D claim volume, percentile in specialty: 8 · MIPS quality, percentile: 50Point, Part D claim volume, percentile in specialty: 60 · MIPS quality, percentile: 63Point, Part D claim volume, percentile in specialty: 53 · MIPS quality, percentile: 20Point, Part D claim volume, percentile in specialty: 75 · MIPS quality, percentile: 70Point, Part D claim volume, percentile in specialty: 37 · MIPS quality, percentile: 55Point, Part D claim volume, percentile in specialty: 98 · MIPS quality, percentile: 32Point, Part D claim volume, percentile in specialty: 47 · MIPS quality, percentile: 83Point, Part D claim volume, percentile in specialty: 38 · MIPS quality, percentile: 95Point, Part D claim volume, percentile in specialty: 50 · MIPS quality, percentile: 42Point, Part D claim volume, percentile in specialty: 17 · MIPS quality, percentile: 88Stephen Villa, Part D claim volume, percentile in specialty: 23 · MIPS quality, percentile: 91
Part D claim volume vs MIPS quality, by specialty percentile

Each dot is one emergency medicine physician peer from a representative sample of 60; the gold marker is Stephen Villa. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.

✓
Board certification likely (heuristic, not verified)

Stephen Villa practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting - 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 Villa?

High performer (top quartile)

NPI registry status

Active

Issued 03/25/2015

NPI 1538553755

Primary specialty

Emergency Medicine Physician

High-volume

64,463 US NPIs in this specialty

Medicare Part D claims

65 82% vs specialty avg

2023 prescription claims

Specialty avg: 352

MIPS final score

100/100 16.5 pts vs avg

Exceptional band

vs 83.5 national avg

Specialty distribution in California

How Emergency Medicine 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%Emergency Medicine Physician0.7%
Largest specialties in California (% of in-state providers)

Medicare quality performance, MIPS

Stephen Villa's 2023 MIPS final score plotted against the Emergency Medicine Physician national average

High performer (top quartile)
MIPS Final Score
100/100
vs 83.5 national avg · 2023 performance year
0%100%National avg84%99%
MIPS final score (Emergency Medicine Physician) - 100/100 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

757 WESTWOOD PLZ STE 1517
Los Angeles, CA 90095
(310) 267-3710

Provider Details

NPI 1538553755
Specialty Emergency Medicine Physician
Gender Male
NPI Issued 03/25/2015

CMS Quality Score (MIPS)

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

100
Final Score
Measured-score avg: 83.5
95.724
Quality
81.588
Cost
100
Promoting Interoperability

Reporting: Group practice

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 Villa. To verify Stephen Villa'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.

65
Total Claims
$4K
Total Drug Cost
35
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
73
Total Day Supply
1,160
Generic Drug Cost
$2K
Antibiotic Claims
28

Patient Demographics

Average Patient Age
71.9 years
Avg HCC Risk Score
1.52
Gender Split
63% female / 37% male
More Emergency Medicine Physician in CA → All providers in California → Compare specialties →

Emergency Medicine Physician Overview

How Stephen Villa fits within the Emergency Medicine Physician landscape nationally.

64,463
Emergency Medicine Physician Providers in US
56
States with Emergency Medicine Physician
352
Avg Claims per Provider

Stephen Villa's 65 claims are below the specialty average of 352.

Nationwide Emergency Medicine Physician peers with similar MIPS or enrollment year

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

Similar MIPS final score

Nearest same-specialty clinicians by CMS MIPS final score (100 here).

Josyann Abisaab 100 NY Jonathan Abraham 100 MI Steven Abrams 100 NY Liliya Abrukin 100 NY

Same NPPES enumeration year (2015)

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

Katherine Wurlitzer Redmond, OR Michael Flores Prosper, TX Aaryn Hammond Winston Salem, NC Robert Surles Houston, TX

Nearby Emergency Medicine Physician Providers in California

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

One of 6,965 Emergency Medicine Physician providers enrolled in California, 5 are shown here.

Dr. Cooper Aakhus
MD
Stanford, CA
Dr. Pyra Aarden
MD
Martinez, CA
Dr. Neal Aaron
D.O.
Encinitas, CA
Eric Aaserude
Walnut Creek, CA
Dr. Nader Abas
MD
Barstow, CA

Compare Emergency Medicine Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is Stephen Villa's specialty? ▼
Stephen Villa specializes in Emergency Medicine Physician and practices in Los Angeles, California.
How much does Stephen Villa prescribe under Medicare Part D? ▼
In 2023, Stephen Villa wrote 65 Medicare Part D claims totaling $4K in drug costs for 35 beneficiaries.
What is Stephen Villa's Medicare quality score? ▼
Stephen Villa has a CMS MIPS Final Score of 100/100 (Quality: 95.7, Cost: 81.6). 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 Stephen Villa located? ▼
Stephen Villa is located at 757 WESTWOOD PLZ STE 1517, Los Angeles, CA, 90095. Phone: (310) 267-3710.
What is Stephen Villa's NPI number? ▼
Stephen Villa's National Provider Identifier (NPI) is 1538553755, issued on 03/25/2015.
How many Emergency Medicine Physician providers are there in the US? ▼
There are 64,463 Emergency Medicine Physician providers across 56 states in the US. The average Emergency Medicine Physician provider writes 352 Medicare Part D claims per year.
Does Stephen Villa accept Medicare? ▼
Stephen Villa appears in CMS Medicare data with 65 Part D claims and 35 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Stephen Villa's credentials? ▼
Stephen Villa's NPI is 1538553755. 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.