2026 NPPES data Neurology Physician NPI 1285946061 M.D.
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CAROLYN FREDERICKS, M.D.

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
359
Medicare Part D claims · 64 beneficiaries · Neurology Physician avg: 1K
MIPS score
73.5637/100
▼ 10 pts below national avg 83.1 · [object Object]
What the federal data reveals: CAROLYN FREDERICKS, M.D. is a Neurology Physician ([object Object]) practicing in NEW HAVEN, Connecticut with a Medicare Part D prescribing footprint of 359 claims across 64 beneficiaries . Their CMS MIPS Final Score of 73.5637/100 (national average: 83.1) reflects performance across Quality, Cost, Interoperability, and Improvement Activities .

What stands out: CAROLYN FREDERICKS, M.D. reported a CMS MIPS final score of 73.5637 out of 100, below the 83.1 national average, and filed 359 Medicare Part D claims in 2023. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

CAROLYN FREDERICKS, 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).

CAROLYN FREDERICKS, M.D. at a glance

Below national average

NPI registry status

Active

Issued 07/08/2010

NPI 1285946061

Primary specialty

Neurology Physician

Mid-sized

19,866 US NPIs in this specialty

Medicare Part D claims

359 73% vs specialty avg

2023 prescription claims

Specialty avg: 1,309

MIPS final score

73.5637/100 9.536299999999997% pts

Mid-tier band

vs 83.1 national avg

Specialty distribution in Connecticut

How Neurology Physician compares to other specialties among Connecticut providers

Connecticut providers

Neurology Physician share within Connecticut

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

Medicare quality performance — MIPS

CAROLYN FREDERICKS, M.D.'s 2023 MIPS final score plotted against the Neurology Physician national average

Below national average
MIPS Final Score
73.5637/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Neurology Physician) — 73.5637/100 vs national avg 83.1

0%100%National avg83%73.6%
MIPS final score (Neurology Physician) — 73.5637/100 vs national avg 83.1

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 FREDERICKS, M.D. is a Neurology Physician provider practicing in NEW HAVEN, Connecticut, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: M.D.. NPI: 1285946061. 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 FREDERICKS, M.D. appears in the CMS NPPES registry as a Neurology Physician provider holding M.D. credentials at 800 HOWARD AVE LOWR LEVEL, NEW HAVEN, CT, 06519, with a listed phone of (203) 785-4085. NPI 1285946061 was issued on 07/08/2010. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what FREDERICKS 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 359 prescription claims written by this provider, covering 64 Medicare beneficiaries and totaling roughly $19K 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. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 73.5637/100 for the 2023 performance year (Quality 75.8435, Cost 51.4318), compared with the national average of 83.1.

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

800 HOWARD AVE LOWR LEVEL
NEW HAVEN, CT 06519

Provider Details

NPI 1285946061
Specialty Neurology Physician
Credentials M.D.
Gender Female
NPI Issued 07/08/2010

CMS Quality Score (MIPS)

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

73.5637
Final Score
Avg: 83.1
75.8435
Quality
51.4318
Cost
74
Promoting Interoperability

Reporting: Group practice

Hospital and facility affiliations

Facilities where CAROLYN FREDERICKS, 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.

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).

Medicare Part D Prescribing Data

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

359
Total Claims
$19K
Total Drug Cost
64
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
710
Total Day Supply
21,020
Generic Drug Cost
$18K

Patient Demographics

Average Patient Age
75.7 years
Avg HCC Risk Score
1.26
Gender Split
63% female / 38% 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
Donepezil Hcl
129
Memantine Hcl
45
Rivastigmine
37
Sertraline Hcl
28
Escitalopram Oxalate
25
Memantine Hcl Er
Memantine Hcl
19
Trazodone Hcl
18
Quetiapine Fumarate
12

* 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 FREDERICKS, M.D. 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 FREDERICKS, M.D.'s 359 claims are below the specialty average of 1,309.

Nearby Neurology Physician Providers in Connecticut

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

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

Frequently Asked Questions

What is CAROLYN FREDERICKS, M.D.'s specialty?
CAROLYN FREDERICKS, M.D. specializes in Neurology Physician and practices in NEW HAVEN, Connecticut. Credentials: M.D..
How much does CAROLYN FREDERICKS, M.D. prescribe under Medicare Part D?
In 2023, CAROLYN FREDERICKS, M.D. wrote 359 Medicare Part D claims totaling $19K in drug costs for 64 beneficiaries.
What is CAROLYN FREDERICKS, M.D.'s Medicare quality score?
CAROLYN FREDERICKS, M.D. has a CMS MIPS Final Score of 73.5637/100 (Quality: 75.8435, Cost: 51.4318). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is CAROLYN FREDERICKS, M.D. located?
CAROLYN FREDERICKS, M.D. is located at 800 HOWARD AVE LOWR LEVEL, NEW HAVEN, CT, 06519. Phone: (203) 785-4085.
What is CAROLYN FREDERICKS, M.D.'s NPI number?
CAROLYN FREDERICKS, M.D.'s National Provider Identifier (NPI) is 1285946061, issued on 07/08/2010.
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 FREDERICKS, M.D. prescribe most often?
Based on 2023 Medicare Part D data, CAROLYN FREDERICKS, M.D.'s most frequently prescribed drugs include Donepezil Hcl, Memantine Hcl, Rivastigmine. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does CAROLYN FREDERICKS, M.D. accept Medicare?
CAROLYN FREDERICKS, M.D. appears in CMS Medicare data with 359 Part D claims and 64 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify CAROLYN FREDERICKS, M.D.'s credentials?
CAROLYN FREDERICKS, M.D.'s NPI is 1285946061 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.
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 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