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2026 NPPES data Adult Medicine Physician NPI 1356499156 DO
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Christopher Arnold, DO

Adult Medicine Physician in Camarillo, 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 2,476 in Adult 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
11K
Medicare Part D claims · 991 beneficiaries · Adult Medicine Physician avg: 3K
Generic prescribing
90%
generic claims · 9% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
96.5/100
▲ 13 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

Christopher Arnold, DO reported a CMS MIPS final score of 96.5/100 - above the 83.5 national average - and filed 11,033 Medicare Part D claims in 2024.

96.5/100
MIPS score · +13 vs avg
11K
Part D claims, 2024
90%
generic prescribing
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.

Federal trust snapshot

What official records show about Christopher Arnold, DO

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 1356499156), first enumerated 01/08/2007.

    Source: CMS NPPES

  • Reported

    Medicare Part D participation

    Filed 11,033 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 96.5/100 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

  • State context

    State board disciplinary context

    California statewide board action statistics are published annually — these figures describe aggregate state activity, not Christopher Arnold, DO'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 1356499156 · Adult Medicine Physician

NPI-10 · ENUM-MID · TAX-NARROW · MIPS-ELITE · RX-HEAVY · BOOK-THIN · PHOTO-FINISH

  • NPI-10 1356499156
  • ENUM-MID 2007
  • TAX-NARROW 2,476
  • MIPS-ELITE 96.5/100
  • RX-HEAVY 11K claims
  • BOOK-THIN 399 in California
  • PHOTO-FINISH Harveen Sodhi · ±0.3

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

Christopher Arnold, DO'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.

97 ≥ 82nd percentile 82% 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 Christopher Arnold, DO sits

This provider among adult medicine physician peers

Across the 204 adult medicine physician providers who report both Medicare Part D prescribing and a MIPS quality score, Christopher Arnold, DO writes more Part D claims than 94% of them and scores higher on MIPS quality than 84% - 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 quality02550751000255075100Part D claim volume, percentile in specialtyMIPS quality, percentilePoint, Part D claim volume, percentile in specialty: 57 · MIPS quality, percentile: 58Point, Part D claim volume, percentile in specialty: 33 · MIPS quality, percentile: 82Point, Part D claim volume, percentile in specialty: 87 · MIPS quality, percentile: 68Point, Part D claim volume, percentile in specialty: 68 · MIPS quality, percentile: 62Point, Part D claim volume, percentile in specialty: 82 · MIPS quality, percentile: 78Point, Part D claim volume, percentile in specialty: 18 · MIPS quality, percentile: 95Point, Part D claim volume, percentile in specialty: 80 · MIPS quality, percentile: 28Point, Part D claim volume, percentile in specialty: 8 · MIPS quality, percentile: 52Point, Part D claim volume, percentile in specialty: 12 · MIPS quality, percentile: 42Point, Part D claim volume, percentile in specialty: 13 · MIPS quality, percentile: 22Point, Part D claim volume, percentile in specialty: 40 · MIPS quality, percentile: 87Point, Part D claim volume, percentile in specialty: 92 · MIPS quality, percentile: 83Point, Part D claim volume, percentile in specialty: 88 · MIPS quality, percentile: 93Point, Part D claim volume, percentile in specialty: 43 · MIPS quality, percentile: 10Point, Part D claim volume, percentile in specialty: 25 · MIPS quality, percentile: 73Point, Part D claim volume, percentile in specialty: 32 · MIPS quality, percentile: 32Point, Part D claim volume, percentile in specialty: 72 · MIPS quality, percentile: 3Point, Part D claim volume, percentile in specialty: 42 · MIPS quality, percentile: 20Point, Part D claim volume, percentile in specialty: 98 · MIPS quality, percentile: 13Point, Part D claim volume, percentile in specialty: 53 · MIPS quality, percentile: 97Point, Part D claim volume, percentile in specialty: 67 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 95 · MIPS quality, percentile: 85Point, Part D claim volume, percentile in specialty: 78 · MIPS quality, percentile: 48Point, Part D claim volume, percentile in specialty: 52 · MIPS quality, percentile: 67Point, Part D claim volume, percentile in specialty: 58 · MIPS quality, percentile: 98Point, Part D claim volume, percentile in specialty: 20 · MIPS quality, percentile: 17Point, Part D claim volume, percentile in specialty: 2 · MIPS quality, percentile: 65Point, Part D claim volume, percentile in specialty: 55 · MIPS quality, percentile: 57Point, Part D claim volume, percentile in specialty: 27 · MIPS quality, percentile: 40Point, Part D claim volume, percentile in specialty: 100 · MIPS quality, percentile: 12Point, Part D claim volume, percentile in specialty: 23 · MIPS quality, percentile: 88Point, Part D claim volume, percentile in specialty: 65 · MIPS quality, percentile: 75Point, Part D claim volume, percentile in specialty: 37 · MIPS quality, percentile: 47Point, Part D claim volume, percentile in specialty: 85 · MIPS quality, percentile: 43Point, Part D claim volume, percentile in specialty: 17 · MIPS quality, percentile: 28Point, Part D claim volume, percentile in specialty: 5 · MIPS quality, percentile: 27Point, Part D claim volume, percentile in specialty: 70 · MIPS quality, percentile: 92Point, Part D claim volume, percentile in specialty: 13 · MIPS quality, percentile: 37Point, Part D claim volume, percentile in specialty: 75 · MIPS quality, percentile: 2Point, Part D claim volume, percentile in specialty: 63 · MIPS quality, percentile: 77Point, Part D claim volume, percentile in specialty: 45 · MIPS quality, percentile: 72Point, Part D claim volume, percentile in specialty: 28 · MIPS quality, percentile: 5Point, Part D claim volume, percentile in specialty: 47 · MIPS quality, percentile: 53Point, Part D claim volume, percentile in specialty: 77 · MIPS quality, percentile: 38Point, Part D claim volume, percentile in specialty: 50 · MIPS quality, percentile: 58Point, Part D claim volume, percentile in specialty: 3 · MIPS quality, percentile: 25Point, Part D claim volume, percentile in specialty: 48 · MIPS quality, percentile: 7Point, Part D claim volume, percentile in specialty: 62 · MIPS quality, percentile: 55Point, Part D claim volume, percentile in specialty: 60 · MIPS quality, percentile: 100Point, Part D claim volume, percentile in specialty: 7 · MIPS quality, percentile: 23Point, Part D claim volume, percentile in specialty: 22 · MIPS quality, percentile: 45Point, Part D claim volume, percentile in specialty: 0 · MIPS quality, percentile: 50Point, Part D claim volume, percentile in specialty: 73 · MIPS quality, percentile: 63Point, Part D claim volume, percentile in specialty: 90 · MIPS quality, percentile: 80Point, Part D claim volume, percentile in specialty: 35 · MIPS quality, percentile: 33Point, Part D claim volume, percentile in specialty: 30 · MIPS quality, percentile: 35Point, Part D claim volume, percentile in specialty: 83 · MIPS quality, percentile: 68Point, Part D claim volume, percentile in specialty: 93 · MIPS quality, percentile: 15Point, Part D claim volume, percentile in specialty: 10 · MIPS quality, percentile: 18Point, Part D claim volume, percentile in specialty: 38 · MIPS quality, percentile: 8Christopher Arnold, DO, Part D claim volume, percentile in specialty: 94 · MIPS quality, percentile: 84
Part D claim volume vs MIPS quality, by specialty percentile

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

✓
Board certification likely (heuristic, not verified)

Christopher Arnold, DO 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 Christopher Arnold, DO?

High performer (top quartile)

NPI registry status

Active

Issued 01/08/2007

NPI 1356499156

Primary specialty

Adult Medicine Physician

Niche

2,476 US NPIs in this specialty

Medicare Part D claims

11,033 281% vs specialty avg

2024 prescription claims

Specialty avg: 2,896

MIPS final score

96.5/100 13 pts vs avg

Exceptional band

vs 83.5 national avg

Specialty distribution in California

How Adult 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%Adult Medicine Physician0%
Largest specialties in California (% of in-state providers)

Medicare quality performance, MIPS

Christopher Arnold, DO's 2023 MIPS final score plotted against the Adult Medicine Physician national average

High performer (top quartile)
MIPS Final Score
96.5/100
vs 83.5 national avg · 2023 performance year
0%100%National avg84%96.5%
MIPS final score (Adult Medicine Physician) - 96.5/100 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

3901 LAS POSAS RD
Camarillo, CA 93010
(805) 383-0647

Provider Details

NPI 1356499156
Specialty Adult Medicine Physician
Credentials DO
Gender Male
NPI Issued 01/08/2007

CMS Quality Score (MIPS)

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

96.5085
Final Score
Measured-score avg: 83.5
80.342
Quality
100
Promoting Interoperability

Reporting: Alternative Payment Model

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 Christopher Arnold, DO. To verify Christopher Arnold, DO'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.

Brand vs generic prescribing mix · Generic-heavy

Christopher Arnold, DO - brand share 9.0%
Adult Medicine Physician average

9% brand-name claims vs 90% generic, on 11,033 2024 Medicare Part D claims.

The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2024.

11,033
Total Claims
$599K
Total Drug Cost
991
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
26,683.467
Total Day Supply
777,305
Brand vs Generic
9% brand / 90% generic
Brand Drug Cost
$452K
Generic Drug Cost
$142K
Opioid Claims
286 (2.6% rate)
Antibiotic Claims
634

Patient Demographics

Average Patient Age
75.6 years
Avg HCC Risk Score
1.07
Gender Split
44% female / 56% male
Age Distribution
<65: 24, 65-74: 450, 75-84: 378, 85+: 139

Top Prescribed Drugs (Medicare Part D)

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

What Christopher Arnold, DO 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
 865
Amlodipine Besylate
 731
Levothyroxine Sodium
 651
Losartan Potassium
 486
Rosuvastatin Calcium
 281
Lisinopril
 274
Albuterol Sulfate Hfa
Albuterol Sulfate
249
Metformin Hcl
 227
Allopurinol
 223
Omeprazole
 210

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

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

Adult Medicine Physician Overview

How Christopher Arnold, DO fits within the Adult Medicine Physician landscape nationally.

2,476
Adult Medicine Physician Providers in US
52
States with Adult Medicine Physician
2,896
Avg Claims per Provider

Christopher Arnold, DO's 11,033 claims are above the specialty average of 2,896.

Nationwide Adult Medicine Physician peers with similar MIPS or enrollment year

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

Similar MIPS final score

Nearest same-specialty clinicians by CMS MIPS final score (96.5 here).

Harveen Sodhi 96.2 AL Kamakshi Baig 96.2 MD William Shelton 96.2 TN Andrea Clark 96 AK

Same NPPES enumeration year (2007)

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

Corazon Abundo Jamaica, NY Anthony Ibe Greenbelt, MD Gil Johnson Conway, AR Boris Byalik Far Rockaway, NY

Nearby Adult Medicine Physician Providers in California

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

One of 399 Adult Medicine Physician providers enrolled in California, 5 are shown here.

Dr. Mina Abazari
M.D.
Laguna Beach, CA
Dr. Derrick Adams
D.O.
Lincoln, CA
Dr. Abhishek Agarwal
M.D.
Roseville, CA
Dr. Marie Agleham
MD
Union City, CA
Dr. Ahmad Ahmadzia
M.D.
Fair Oaks, CA

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

Frequently Asked Questions

What is Christopher Arnold, DO's specialty? ▼
Christopher Arnold, DO specializes in Adult Medicine Physician and practices in Camarillo, California. Credentials: DO.
How much does Christopher Arnold, DO prescribe under Medicare Part D? ▼
In 2024, Christopher Arnold, DO wrote 11,033 Medicare Part D claims totaling $599K in drug costs for 991 beneficiaries.
What is Christopher Arnold, DO's Medicare quality score? ▼
Christopher Arnold, DO has a CMS MIPS Final Score of 96.5/100 (Quality: 80.3). 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 Christopher Arnold, DO located? ▼
Christopher Arnold, DO is located at 3901 LAS POSAS RD, Camarillo, CA, 93010. Phone: (805) 383-0647.
What is Christopher Arnold, DO's NPI number? ▼
Christopher Arnold, DO's National Provider Identifier (NPI) is 1356499156, issued on 01/08/2007.
Does Christopher Arnold, DO prescribe more brand-name or generic drugs? ▼
Christopher Arnold, DO's prescribing is 9% brand-name and 90% generic drugs by claim count, with $452K in brand drug costs.
Does Christopher Arnold, DO prescribe opioids? ▼
Yes, Christopher Arnold, DO had 286 opioid claims in 2024 with an opioid prescribing rate of 2.6%.
How many Adult Medicine Physician providers are there in the US? ▼
There are 2,476 Adult Medicine Physician providers across 52 states in the US. The average Adult Medicine Physician provider writes 2,896 Medicare Part D claims per year.
What drugs does Christopher Arnold, DO prescribe most often? ▼
Based on 2024 Medicare Part D data, Christopher Arnold, DO's most frequently prescribed drugs include Atorvastatin Calcium, Amlodipine Besylate, Levothyroxine Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Christopher Arnold, DO accept Medicare? ▼
Christopher Arnold, DO appears in CMS Medicare data with 11,033 Part D claims and 991 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Christopher Arnold, DO's credentials? ▼
Christopher Arnold, DO's NPI is 1356499156 with credentials DO. 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.