2026 NPPES data Neurology Physician NPI 1609947506 MD
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CAROLYN NEFF, MD

Neurology Physician in CHARLESTON, West Virginia. 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
4K
Medicare Part D claims · 566 beneficiaries · Neurology Physician avg: 1K
What the federal data reveals: CAROLYN NEFF, MD is a Neurology Physician ([object Object]) practicing in CHARLESTON, West Virginia with a Medicare Part D prescribing footprint of 4K claims across 566 beneficiaries .

What stands out: CAROLYN NEFF, MD filed 4,495 Medicare Part D claims in 2023 across CHARLESTON, West Virginia. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

CAROLYN NEFF, MD 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).

CAROLYN NEFF, MD at a glance

Quality data not reported

NPI registry status

Active

Issued 11/13/2006

NPI 1609947506

Primary specialty

Neurology Physician

Mid-sized

19,866 US NPIs in this specialty

Medicare Part D claims

4,495 243% vs specialty avg

2023 prescription claims

Specialty avg: 1,309

Specialty distribution in West Virginia

How Neurology Physician compares to other specialties among West Virginia providers

West Virginia providers

Neurology Physician share within West Virginia

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

Specialty board-certification context

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

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

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

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

CAROLYN NEFF, MD is a Neurology Physician provider practicing in CHARLESTON, West Virginia, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD. NPI: 1609947506. 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.

CAROLYN NEFF, MD appears in the CMS NPPES registry as a Neurology Physician provider holding MD credentials at 415 MORRIS ST STE 300, CHARLESTON, WV, 25301, with a listed phone of (304) 388-6441. NPI 1609947506 was issued on 11/13/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what NEFF 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 4,495 prescription claims written by this provider, covering 566 Medicare beneficiaries and totaling roughly $1.8 million 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.

Neurology Physician is a mid-sized specialty nationwide, with 19,866 enrolled providers across 54 states and an average of 1,309 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

415 MORRIS ST STE 300
CHARLESTON, WV 25301

Provider Details

NPI 1609947506
Specialty Neurology Physician
Credentials MD
Gender Female
NPI Issued 11/13/2006

Hospital and facility affiliations

Facilities where CAROLYN NEFF, MD 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.

CHARLESTON AREA MEDICAL CENTER INC
CHARLESTON, WV

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

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

4,495
Total Claims
$1.8M
Total Drug Cost
566
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
11,528
Total Day Supply
343,794
Generic Drug Cost
$241K

Patient Demographics

Average Patient Age
75.1 years
Avg HCC Risk Score
1.68
Gender Split
50% female / 50% male
Age Distribution
<65: 49, 65-74: 208, 75-84: 229, 85+: 80

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Carbidopa-Levodopa
Carbidopa/Levodopa
723
Donepezil Hcl
252
Amantadine
Amantadine Hcl
240
Neupro
Rotigotine
182
Rasagiline Mesylate
133
Ropinirole Hcl
131
Clonazepam
130
Memantine Hcl
120
Gabapentin
114
Levetiracetam
106

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

Neurology Physician Overview

How CAROLYN NEFF, MD fits within the Neurology Physician landscape nationally.

19,866
Neurology Physician Providers in US
54
States with Neurology Physician
1,309
Avg Claims per Provider

CAROLYN NEFF, MD's 4,495 claims are above the specialty average of 1,309.

Nearby Neurology Physician Providers in West Virginia

Other clinicians with the same primary specialty enrolled in West Virginia, drawn from the same CMS NPPES roster as NEFF.

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

Frequently Asked Questions

What is CAROLYN NEFF, MD's specialty?
CAROLYN NEFF, MD specializes in Neurology Physician and practices in CHARLESTON, West Virginia. Credentials: MD.
How much does CAROLYN NEFF, MD prescribe under Medicare Part D?
In 2023, CAROLYN NEFF, MD wrote 4,495 Medicare Part D claims totaling $1.8M in drug costs for 566 beneficiaries.
Where is CAROLYN NEFF, MD located?
CAROLYN NEFF, MD is located at 415 MORRIS ST STE 300, CHARLESTON, WV, 25301. Phone: (304) 388-6441.
What is CAROLYN NEFF, MD's NPI number?
CAROLYN NEFF, MD's National Provider Identifier (NPI) is 1609947506, issued on 11/13/2006.
How many Neurology Physician providers are there in the US?
There are 19,866 Neurology Physician providers across 54 states in the US. The average Neurology Physician provider writes 1,309 Medicare Part D claims per year.
What drugs does CAROLYN NEFF, MD prescribe most often?
Based on 2023 Medicare Part D data, CAROLYN NEFF, MD's most frequently prescribed drugs include Carbidopa-Levodopa, Donepezil Hcl, Amantadine. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does CAROLYN NEFF, MD accept Medicare?
CAROLYN NEFF, MD appears in CMS Medicare data with 4,495 Part D claims and 566 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify CAROLYN NEFF, MD's credentials?
CAROLYN NEFF, MD's NPI is 1609947506 with credentials MD. 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