2026 NPPES data Clinical Pathology/Laboratory Medicine Physician NPI 1063578227 M.D.
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ROBERT JAMES, M.D.

Clinical Pathology/Laboratory Medicine Physician in VENTURA, California. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
21
Medicare Part D claims · Clinical Pathology/Laboratory Medicine Physician avg: 149
What the federal data reveals: ROBERT JAMES, M.D. is a Clinical Pathology/Laboratory Medicine Physician ([object Object]) practicing in VENTURA, California with a Medicare Part D prescribing footprint of 21 claims .

What stands out: ROBERT JAMES, M.D. filed 21 Medicare Part D claims in 2023 across VENTURA, California. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board-eligible specialty (heuristic — not verified)

ROBERT JAMES, M.D. practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).

ROBERT JAMES, M.D. at a glance

Quality data not reported

NPI registry status

Active

Issued 12/29/2006

NPI 1063578227

Primary specialty

Clinical Pathology/Laboratory Medicine Physician

Niche

1,229 US NPIs in this specialty

Medicare Part D claims

21 86% vs specialty avg

2023 prescription claims

Specialty avg: 149

Specialty distribution in California

How Clinical Pathology/Laboratory Medicine Physician compares to other specialties among California providers

California providers

Clinical Pathology/Laboratory Medicine Physician share within California

1. Clinical Pathology/Laboratory Medicine Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Clinical Pathology/Laboratory Medicine Physician share within California

Specialty board-certification context

Estimated specialty board-certified rate — Clinical Pathology/Laboratory Medicine Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Clinical Pathology/Laboratory Medicine Physician ABMS/AOA estimate

Est. board-certified rate (Clinical Pathology/Laboratory Medicine Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Clinical Pathology/Laboratory Medicine Physician) — ABMS / AOA estimate

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).

ROBERT JAMES, M.D. is a Clinical Pathology/Laboratory Medicine Physician provider practicing in VENTURA, California, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: M.D.. NPI: 1063578227. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

ROBERT JAMES, M.D. appears in the CMS NPPES registry as a Clinical Pathology/Laboratory Medicine Physician provider holding M.D. credentials at 3291 LOMA VISTA RD, VENTURA, CA, 93003, with a listed phone of (805) 652-6556. NPI 1063578227 was issued on 12/29/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what JAMES 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 21 prescription claims written by this provider, covering N/A Medicare beneficiaries and totaling roughly $6K in drug spend. 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.

Clinical Pathology/Laboratory Medicine Physician is a narrow specialty nationwide, with 1,229 enrolled providers across 51 states and an average of 149 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

3291 LOMA VISTA RD
VENTURA, CA 93003

Provider Details

NPI 1063578227
Specialty Clinical Pathology/Laboratory Medicine Physician
Credentials M.D.
Gender Male
NPI Issued 12/29/2006

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 ROBERT JAMES, M.D.. To verify ROBERT JAMES, 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 2023.

21
Total Claims
$6K
Total Drug Cost
N/A
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
40
Total Day Supply
1,115
Generic Drug Cost
$255

Patient Demographics

Average Patient Age
72.0 years
Avg HCC Risk Score
0.94

Clinical Pathology/Laboratory Medicine Physician Overview

How ROBERT JAMES, M.D. fits within the Clinical Pathology/Laboratory Medicine Physician landscape nationally.

1,229
Clinical Pathology/Laboratory Medicine Physician Providers in US
51
States with Clinical Pathology/Laboratory Medicine Physician
149
Avg Claims per Provider

ROBERT JAMES, M.D.'s 21 claims are below the specialty average of 149.

Nearby Clinical Pathology/Laboratory Medicine Physician Providers in California

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

Compare Clinical Pathology/Laboratory Medicine Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is ROBERT JAMES, M.D.'s specialty?
ROBERT JAMES, M.D. specializes in Clinical Pathology/Laboratory Medicine Physician and practices in VENTURA, California. Credentials: M.D..
How much does ROBERT JAMES, M.D. prescribe under Medicare Part D?
In 2023, ROBERT JAMES, M.D. wrote 21 Medicare Part D claims totaling $6K in drug costs for N/A beneficiaries.
Where is ROBERT JAMES, M.D. located?
ROBERT JAMES, M.D. is located at 3291 LOMA VISTA RD, VENTURA, CA, 93003. Phone: (805) 652-6556.
What is ROBERT JAMES, M.D.'s NPI number?
ROBERT JAMES, M.D.'s National Provider Identifier (NPI) is 1063578227, issued on 12/29/2006.
How many Clinical Pathology/Laboratory Medicine Physician providers are there in the US?
There are 1,229 Clinical Pathology/Laboratory Medicine Physician providers across 51 states in the US. The average Clinical Pathology/Laboratory Medicine Physician provider writes 149 Medicare Part D claims per year.
Does ROBERT JAMES, M.D. accept Medicare?
ROBERT JAMES, M.D. appears in CMS Medicare data with 21 Part D claims and N/A Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify ROBERT JAMES, M.D.'s credentials?
ROBERT JAMES, M.D.'s NPI is 1063578227 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

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