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2026 NPPES data Internal Medicine Physician NPI 1376587709 M.D
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William Ensley, M.D

Internal Medicine Physician in Newport Beach, 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 174,792 in Internal 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
2K
Medicare Part D claims · 200 beneficiaries · Internal Medicine Physician avg: 3K
MIPS score
44/100
▼ 39 pts below national avg 83.5 · Below average
Verify NPI on CMS Methodology
Compiled from official public sources by the editorial process.

What the federal data shows

William Ensley, M.D reported a CMS MIPS final score of 44/100 - below the 83.5 national average - and filed 1,518 Medicare Part D claims in 2024.

44/100
MIPS score · -39 vs avg
2K
Part D claims, 2024
Likely
board-certified (heuristic)
≥4th
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.

Federal trust snapshot

What official records show about William Ensley, M.D

Federal records show an active NPI with both Medicare prescribing volume and a measured CMS quality score — objective registry data, not patient reviews.

  • Verified

    NPI registry status

    Active listing in the CMS National Provider Identifier Registry (NPI 1376587709), first enumerated 06/15/2006.

    Source: CMS NPPES

  • Reported

    Medicare Part D participation

    Filed 1,518 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.

    Source: CMS Part D Prescriber PUF

  • Reported

    CMS quality reporting (MIPS)

    Reported a CMS MIPS final score of 44/100 in the Quality Payment Program — a federal quality measure, not a patient review.

    Source: CMS Quality Payment Program

  • Reported

    Board certification signal

    Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.

    Source: NUCC taxonomy + CMS participation heuristic

  • Reported

    Hospital affiliations

    1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.

    Source: CMS Care Compare

  • State context

    State board disciplinary context

    California statewide board action statistics are published annually — these figures describe aggregate state activity, not William Ensley, M.D's individual license status. Verify directly with the state medical board.

    Source: MBC annual report 2023

  • Not in federal data

    Individual sanction lookup

    PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.

    Source: State medical board / FSMB

This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.

CMS NPPES provider registry desk

NPI 1376587709 · Internal Medicine Physician

NPI-10 · ENUM-LEGACY · TAX-MEGA · MIPS-LOW · RX-MID · BOOK-MID · PHOTO-FINISH

  • NPI-10 1376587709
  • ENUM-LEGACY 2006
  • TAX-MEGA 175K Internal Medicine
  • MIPS-LOW 44/100
  • RX-MID 1,518
  • BOOK-MID 20,403 in California
  • PHOTO-FINISH Subhadra Bandhakavi · ±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

William Ensley, M.D'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.

44 ≥ 4th percentile 4% 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%). This entry sits in this band. 50–60: 5,882 measured providers (1%). Above this entry. 60–70: 13,906 measured providers (3%). Above this entry. 70–80: 94,570 measured providers (21%). Above this entry. 80–90: 129,887 measured providers (29%). Above this entry. 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 William Ensley, M.D sits

This provider among internal medicine physician peers

Across the 34,612 internal medicine physician providers who report both Medicare Part D prescribing and a MIPS quality score, William Ensley, M.D writes more Part D claims than 63% of them and scores higher on MIPS quality than 5% - placing this provider in the high-volume, lower-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 quality02550751000255075100Part D claim volume, percentile in specialtyMIPS quality, percentilePoint, Part D claim volume, percentile in specialty: 97 · MIPS quality, percentile: 87Point, Part D claim volume, percentile in specialty: 43 · MIPS quality, percentile: 65Point, Part D claim volume, percentile in specialty: 83 · MIPS quality, percentile: 45Point, Part D claim volume, percentile in specialty: 30 · MIPS quality, percentile: 40Point, Part D claim volume, percentile in specialty: 78 · MIPS quality, percentile: 42Point, Part D claim volume, percentile in specialty: 3 · MIPS quality, percentile: 83Point, Part D claim volume, percentile in specialty: 42 · MIPS quality, percentile: 35Point, Part D claim volume, percentile in specialty: 95 · MIPS quality, percentile: 50Point, Part D claim volume, percentile in specialty: 65 · MIPS quality, percentile: 93Point, Part D claim volume, percentile in specialty: 20 · MIPS quality, percentile: 97Point, Part D claim volume, percentile in specialty: 37 · MIPS quality, percentile: 58Point, Part D claim volume, percentile in specialty: 27 · MIPS quality, percentile: 20Point, Part D claim volume, percentile in specialty: 28 · MIPS quality, percentile: 15Point, Part D claim volume, percentile in specialty: 92 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 70 · MIPS quality, percentile: 90Point, Part D claim volume, percentile in specialty: 15 · MIPS quality, percentile: 13Point, Part D claim volume, percentile in specialty: 0 · MIPS quality, percentile: 22Point, Part D claim volume, percentile in specialty: 47 · MIPS quality, percentile: 25Point, Part D claim volume, percentile in specialty: 67 · MIPS quality, percentile: 75Point, Part D claim volume, percentile in specialty: 55 · MIPS quality, percentile: 97Point, Part D claim volume, percentile in specialty: 73 · MIPS quality, percentile: 3Point, Part D claim volume, percentile in specialty: 7 · MIPS quality, percentile: 48Point, Part D claim volume, percentile in specialty: 23 · MIPS quality, percentile: 53Point, Part D claim volume, percentile in specialty: 48 · MIPS quality, percentile: 12Point, Part D claim volume, percentile in specialty: 52 · MIPS quality, percentile: 18Point, Part D claim volume, percentile in specialty: 22 · MIPS quality, percentile: 28Point, Part D claim volume, percentile in specialty: 80 · MIPS quality, percentile: 75Point, Part D claim volume, percentile in specialty: 98 · MIPS quality, percentile: 2Point, Part D claim volume, percentile in specialty: 87 · MIPS quality, percentile: 47Point, Part D claim volume, percentile in specialty: 85 · MIPS quality, percentile: 72Point, Part D claim volume, percentile in specialty: 35 · MIPS quality, percentile: 82Point, Part D claim volume, percentile in specialty: 72 · MIPS quality, percentile: 27Point, Part D claim volume, percentile in specialty: 12 · MIPS quality, percentile: 17Point, Part D claim volume, percentile in specialty: 90 · MIPS quality, percentile: 38Point, Part D claim volume, percentile in specialty: 25 · MIPS quality, percentile: 30Point, Part D claim volume, percentile in specialty: 5 · MIPS quality, percentile: 60Point, Part D claim volume, percentile in specialty: 57 · MIPS quality, percentile: 68Point, Part D claim volume, percentile in specialty: 82 · MIPS quality, percentile: 5Point, Part D claim volume, percentile in specialty: 75 · MIPS quality, percentile: 57Point, Part D claim volume, percentile in specialty: 88 · MIPS quality, percentile: 23Point, Part D claim volume, percentile in specialty: 38 · MIPS quality, percentile: 87Point, Part D claim volume, percentile in specialty: 8 · MIPS quality, percentile: 73Point, Part D claim volume, percentile in specialty: 33 · MIPS quality, percentile: 85Point, Part D claim volume, percentile in specialty: 63 · MIPS quality, percentile: 10Point, Part D claim volume, percentile in specialty: 18 · MIPS quality, percentile: 70Point, Part D claim volume, percentile in specialty: 68 · MIPS quality, percentile: 67Point, Part D claim volume, percentile in specialty: 40 · MIPS quality, percentile: 43Point, Part D claim volume, percentile in specialty: 50 · MIPS quality, percentile: 7Point, Part D claim volume, percentile in specialty: 2 · MIPS quality, percentile: 62Point, Part D claim volume, percentile in specialty: 62 · MIPS quality, percentile: 95Point, Part D claim volume, percentile in specialty: 45 · MIPS quality, percentile: 32Point, Part D claim volume, percentile in specialty: 10 · MIPS quality, percentile: 55Point, Part D claim volume, percentile in specialty: 13 · MIPS quality, percentile: 80Point, Part D claim volume, percentile in specialty: 32 · MIPS quality, percentile: 62Point, Part D claim volume, percentile in specialty: 58 · MIPS quality, percentile: 97Point, Part D claim volume, percentile in specialty: 17 · MIPS quality, percentile: 78Point, Part D claim volume, percentile in specialty: 93 · MIPS quality, percentile: 92Point, Part D claim volume, percentile in specialty: 53 · MIPS quality, percentile: 52Point, Part D claim volume, percentile in specialty: 100 · MIPS quality, percentile: 33Point, Part D claim volume, percentile in specialty: 60 · MIPS quality, percentile: 35William Ensley, M.D, Part D claim volume, percentile in specialty: 63 · MIPS quality, percentile: 5
Part D claim volume vs MIPS quality, by specialty percentile

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

✓
Board certification likely (heuristic, not verified)

William Ensley, 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 William Ensley, M.D?

Below national average

NPI registry status

Active

Issued 06/15/2006

NPI 1376587709

Primary specialty

Internal Medicine Physician

High-volume

174,792 US NPIs in this specialty

Medicare Part D claims

1,518 45% vs specialty avg

2024 prescription claims

Specialty avg: 2,785

MIPS final score

44/100 39.5 pts vs avg

Below average band

vs 83.5 national avg

Specialty distribution in California

How Internal Medicine Physician compares to other specialties among California providers

California providers
Behavior Technician17.9%Marriage & Family Therapist5.4%Student in an Organized Heal…5.1%Mental Health Counselor3.7%Pharmacist3.4%Clinical Social Worker3.1%Internal Medicine Physician2.1%
Largest specialties in California (% of in-state providers)

Medicare quality performance, MIPS

William Ensley, M.D's 2023 MIPS final score plotted against the Internal Medicine Physician national average

Below national average
MIPS Final Score
44/100
vs 83.5 national avg · 2023 performance year
0%100%National avg84%44%
MIPS final score (Internal Medicine Physician) - 44/100 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

1 HOAG DR.
Newport Beach, CA 92663
(949) 574-4694

Provider Details

NPI 1376587709
Specialty Internal Medicine Physician
Credentials M.D
Gender Male
NPI Issued 06/15/2006

CMS Quality Score (MIPS)

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

44.0236
Final Score
Measured-score avg: 83.5
41.1412
Quality
56.3393
Cost

Reporting: Group practice

Hospital and facility affiliations

Facilities where William Ensley, 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.

Pacific Hospitalist Associates A Medical Corporation
Newport Beach, 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 William Ensley, M.D. To verify William Ensley, 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 2024.

1,518
Total Claims
$104K
Total Drug Cost
200
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
1,603.767
Total Day Supply
32,494
Generic Drug Cost
$24K
Opioid Claims
16 (1.1% rate)
Antibiotic Claims
94

Patient Demographics

Average Patient Age
78.6 years
Avg HCC Risk Score
2.58
Gender Split
53% female / 47% male
Age Distribution
<65: 12, 65-74: 56, 75-84: 74, 85+: 58

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.

What William Ensley, M.D prescribes most

Top Medicare Part D drugs by claim count, 2024

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2024
Drug Claims
Atorvastatin Calcium
 63
Clopidogrel
Clopidogrel Bisulfate
46
Metoprolol Tartrate
 42
Furosemide
 41
Hydralazine Hcl
 39
Eliquis
Apixaban
37
Famotidine
 35
Lisinopril
 35
Metformin Hcl
 35
Xarelto
Rivaroxaban
33

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

More Internal Medicine Physician in CA → All providers in California → Compare specialties →

Internal Medicine Physician Overview

How William Ensley, M.D fits within the Internal Medicine Physician landscape nationally.

174,792
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,785
Avg Claims per Provider

William Ensley, M.D's 1,518 claims are below the specialty average of 2,785.

Nationwide Internal Medicine Physician peers with similar MIPS or enrollment year

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

Similar MIPS final score

Nearest same-specialty clinicians by CMS MIPS final score (44 here).

Andrea Harangozo 44.1 NJ Subhadra Bandhakavi 43.9 TX Jimmy Uy 44.1 TX William Walker 44.1 NC

Same NPPES enumeration year (2006)

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

Kiranmayi Surapaneni Hazel Park, MI Bruce Hollinger Nashville, TN Miriam Brandon Powell, TN Chandra Prabha Norfolk, NE

Nearby Internal Medicine Physician Providers in California

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

One of 20,403 Internal Medicine Physician providers enrolled in California, 5 are shown here.

Dr. Jacob Aaron
MD
San Francisco, CA
Dr. Alistair Aaronson
MD
Stanford, CA
Dr. Jose Abad.
MD
Sacramento, CA
Dr. Donna Abare
MD
Oakland, CA
Marce Abare
Scotts Valley, CA

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

Frequently Asked Questions

What is William Ensley, M.D's specialty? ▼
William Ensley, M.D specializes in Internal Medicine Physician and practices in Newport Beach, California. Credentials: M.D.
How much does William Ensley, M.D prescribe under Medicare Part D? ▼
In 2024, William Ensley, M.D wrote 1,518 Medicare Part D claims totaling $104K in drug costs for 200 beneficiaries.
What is William Ensley, M.D's Medicare quality score? ▼
William Ensley, M.D has a CMS MIPS Final Score of 44/100 (Quality: 41.1, Cost: 56.3). 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 William Ensley, M.D located? ▼
William Ensley, M.D is located at 1 HOAG DR., Newport Beach, CA, 92663. Phone: (949) 574-4694.
What is William Ensley, M.D's NPI number? ▼
William Ensley, M.D's National Provider Identifier (NPI) is 1376587709, issued on 06/15/2006.
Does William Ensley, M.D prescribe opioids? ▼
Yes, William Ensley, M.D had 16 opioid claims in 2024 with an opioid prescribing rate of 1.1%.
How many Internal Medicine Physician providers are there in the US? ▼
There are 174,792 Internal Medicine Physician providers across 56 states in the US. The average Internal Medicine Physician provider writes 2,785 Medicare Part D claims per year.
What drugs does William Ensley, M.D prescribe most often? ▼
Based on 2024 Medicare Part D data, William Ensley, M.D's most frequently prescribed drugs include Atorvastatin Calcium, Clopidogrel, Metoprolol Tartrate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does William Ensley, M.D accept Medicare? ▼
William Ensley, M.D appears in CMS Medicare data with 1,518 Part D claims and 200 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify William Ensley, M.D's credentials? ▼
William Ensley, M.D's NPI is 1376587709 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 (2024). 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 August 2026 (NPPES) / 2024 (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 August 2026.