2026 NPPES data Vascular Neurology Physician NPI 1467867481 MD PHD
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JAMES GILES, MD PHD

Vascular Neurology Physician in NEW HAVEN, Connecticut. 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
290
Medicare Part D claims · 60 beneficiaries · Vascular Neurology Physician avg: 378
Generic prescribing
77%
generic claims · 23% brand-name · higher generic rates reduce patient out-of-pocket costs
What the federal data reveals: JAMES GILES, MD PHD is a Vascular Neurology Physician ([object Object]) practicing in NEW HAVEN, Connecticut with a Medicare Part D prescribing footprint of 290 claims across 60 beneficiaries — 23% brand-name prescribing .

What stands out: JAMES GILES, MD PHD filed 290 Medicare Part D claims in 2023 across NEW HAVEN, Connecticut. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

JAMES GILES, MD PHD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation — signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

JAMES GILES, MD PHD at a glance

Quality data not reported

NPI registry status

Active

Issued 06/28/2014

NPI 1467867481

Primary specialty

Vascular Neurology Physician

Niche

555 US NPIs in this specialty

Medicare Part D claims

290 23% vs specialty avg

2023 prescription claims

Specialty avg: 378

Specialty distribution in Connecticut

How Vascular Neurology Physician compares to other specialties among Connecticut providers

Connecticut providers

Vascular Neurology Physician share within Connecticut

1. Vascular Neurology Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Vascular Neurology Physician share within Connecticut

Specialty board-certification context

Estimated specialty board-certified rate — Vascular Neurology Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Vascular Neurology Physician ABMS/AOA estimate

Est. board-certified rate (Vascular Neurology Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Vascular Neurology 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).

JAMES GILES, MD PHD is a Vascular Neurology Physician provider practicing in NEW HAVEN, Connecticut, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD PHD. NPI: 1467867481. 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.

JAMES GILES, MD PHD appears in the CMS NPPES registry as a Vascular Neurology Physician provider holding MD PHD credentials at 15 YORK ST, NEW HAVEN, CT, 06510, with a listed phone of (203) 747-4276. NPI 1467867481 was issued on 06/28/2014. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what GILES 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 290 prescription claims written by this provider, covering 60 Medicare beneficiaries and totaling roughly $53K in drug spend, split 23% brand-name and 77% generic by claim count. 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.

Vascular Neurology Physician is a narrow specialty nationwide, with 555 enrolled providers across 47 states and an average of 378 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

15 YORK ST
NEW HAVEN, CT 06510

Provider Details

NPI 1467867481
Specialty Vascular Neurology Physician
Credentials MD PHD
Gender Male
NPI Issued 06/28/2014

Hospital and facility affiliations

Facilities where JAMES GILES, MD PHD 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.

YALE UNIVERSITY
NEW HAVEN, CT

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

Brand vs generic prescribing mix · Typical

JAMES GILES, MD PHD — brand share 23.0%
Specialty average (est.)

23% brand-name claims vs 77% generic, on 290 2023 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 2023.

290
Total Claims
$53K
Total Drug Cost
60
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
491
Total Day Supply
14,532
Brand vs Generic
23% brand / 77% generic
Brand Drug Cost
$47K
Generic Drug Cost
$6K

Patient Demographics

Average Patient Age
75.9 years
Avg HCC Risk Score
2.09
Gender Split
60% female / 40% male

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Rosuvastatin Calcium
39
Amlodipine Besylate
31
Atorvastatin Calcium
22
Eliquis
Apixaban
21
Praluent Pen
Alirocumab
15
Clopidogrel
Clopidogrel Bisulfate
14
Levetiracetam
12
Metoprolol Tartrate
12

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

Vascular Neurology Physician Overview

How JAMES GILES, MD PHD fits within the Vascular Neurology Physician landscape nationally.

555
Vascular Neurology Physician Providers in US
47
States with Vascular Neurology Physician
378
Avg Claims per Provider

JAMES GILES, MD PHD's 290 claims are below the specialty average of 378.

Nearby Vascular Neurology Physician Providers in Connecticut

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

Compare Vascular Neurology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is JAMES GILES, MD PHD's specialty?
JAMES GILES, MD PHD specializes in Vascular Neurology Physician and practices in NEW HAVEN, Connecticut. Credentials: MD PHD.
How much does JAMES GILES, MD PHD prescribe under Medicare Part D?
In 2023, JAMES GILES, MD PHD wrote 290 Medicare Part D claims totaling $53K in drug costs for 60 beneficiaries.
Where is JAMES GILES, MD PHD located?
JAMES GILES, MD PHD is located at 15 YORK ST, NEW HAVEN, CT, 06510. Phone: (203) 747-4276.
What is JAMES GILES, MD PHD's NPI number?
JAMES GILES, MD PHD's National Provider Identifier (NPI) is 1467867481, issued on 06/28/2014.
Does JAMES GILES, MD PHD prescribe more brand-name or generic drugs?
JAMES GILES, MD PHD's prescribing is 23% brand-name and 77% generic drugs by claim count, with $47K in brand drug costs.
How many Vascular Neurology Physician providers are there in the US?
There are 555 Vascular Neurology Physician providers across 47 states in the US. The average Vascular Neurology Physician provider writes 378 Medicare Part D claims per year.
What drugs does JAMES GILES, MD PHD prescribe most often?
Based on 2023 Medicare Part D data, JAMES GILES, MD PHD's most frequently prescribed drugs include Rosuvastatin Calcium, Amlodipine Besylate, Atorvastatin Calcium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does JAMES GILES, MD PHD accept Medicare?
JAMES GILES, MD PHD appears in CMS Medicare data with 290 Part D claims and 60 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify JAMES GILES, MD PHD's credentials?
JAMES GILES, MD PHD's NPI is 1467867481 with credentials MD PHD. 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