2026 NPPES data Internal Medicine Physician NPI 1285609412 M.D.
Verify on CMS →

KAREN BROWN, M.D.

Internal Medicine Physician in HAMDEN, 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
4K
Medicare Part D claims · 529 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
90%
generic claims · 10% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
93.2757/100
▲ 10 pts above national avg 83.1 · [object Object]

What the federal data shows

KAREN BROWN, M.D. reported a CMS MIPS final score of 93.2757/100 — above the 83.1 national average — and filed 3,750 Medicare Part D claims in 2023.

93.2757/100
MIPS score · +10 vs avg
4K
Part D claims, 2023
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.

KAREN BROWN, M.D.'s MIPS score vs every scored U.S. clinician

CMS Merit-based Incentive Payment System (MIPS) final score, 2023 — the federal quality measure

93 Top 29% higher than 71% of 477,587 scored providers

0–10: 8,684 scored providers (2%). Below this entry. 10–20: 3,008 scored providers (1%). Below this entry. 20–30: 3,069 scored providers (1%). Below this entry. 30–40: 2,746 scored providers (1%). Below this entry. 40–50: 2,928 scored providers (1%). Below this entry. 50–60: 5,882 scored providers (1%). Below this entry. 60–70: 13,906 scored providers (3%). Below this entry. 70–80: 118,074 scored providers (25%). Below this entry. 80–90: 129,887 scored providers (27%). Below this entry. 90–100: 189,403 scored providers (40%). This entry sits in this band. This provider 0 100 every MIPS-scored clinician, bucketed by value

Each bar is a band; taller bars hold more scored 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.

Source CMS Merit-based Incentive Payment System (MIPS) · 2023

Board certification likely (heuristic — not verified)

KAREN BROWN, 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).

What does the federal data show about KAREN BROWN, M.D.?

High performer (top quartile)

NPI registry status

Active

Issued 02/21/2006

NPI 1285609412

Primary specialty

Internal Medicine Physician

High-volume

172,858 US NPIs in this specialty

Medicare Part D claims

3,750 38% vs specialty avg

2023 prescription claims

Specialty avg: 2,716

MIPS final score

93.2757/100 10.175700000000006% pts

Exceptional band

vs 83.1 national avg

Specialty distribution in Connecticut

How Internal Medicine Physician compares to other specialties among Connecticut providers

Connecticut providers

Internal Medicine Physician share within Connecticut

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

Medicare quality performance — MIPS

KAREN BROWN, M.D.'s 2023 MIPS final score plotted against the Internal Medicine Physician national average

High performer (top quartile)
MIPS Final Score
93.2757/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Internal Medicine Physician) — 93.2757/100 vs national avg 83.1

0%100%National avg83%93.3%
MIPS final score (Internal Medicine Physician) — 93.2757/100 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).

KAREN BROWN, M.D. appears in the CMS NPPES registry as a Internal Medicine Physician provider holding M.D. credentials at 2440 WHITNEY AVE, HAMDEN, CT, 06518, with a listed phone of (203) 288-9650. NPI 1285609412 was issued on 02/21/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what BROWN 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 3,750 prescription claims written by this provider, covering 529 Medicare beneficiaries and totaling roughly $403K in drug spend, split 10% brand-name and 90% generic by claim count, with an opioid prescribing rate of 1.1%. 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 93.2757/100 for the 2023 performance year (Quality 81.7219), compared with the national average of 83.1.

Internal Medicine Physician is a high-volume specialty nationwide, with 172,858 enrolled providers across 56 states and an average of 2,716 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

2440 WHITNEY AVE
HAMDEN, CT 06518

Provider Details

NPI 1285609412
Specialty Internal Medicine Physician
Credentials M.D.
Gender Female
NPI Issued 02/21/2006

CMS Quality Score (MIPS)

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

93.2757
Final Score
Avg: 83.1
81.7219
Quality
78.0315
Promoting Interoperability

Reporting: Alternative Payment Model

Hospital and facility affiliations

Facilities where KAREN BROWN, 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.

NORTHEAST MEDICAL GROUP INC
STRATFORD, 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

KAREN BROWN, M.D. — brand share 10.0%
Specialty average (est.)

10% brand-name claims vs 90% generic, on 3,750 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.

3,750
Total Claims
$403K
Total Drug Cost
529
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
9,451
Total Day Supply
276,466
Brand vs Generic
10% brand / 90% generic
Brand Drug Cost
$309K
Generic Drug Cost
$93K
Opioid Claims
40 (1.1% rate)
Antibiotic Claims
82

Patient Demographics

Average Patient Age
73.8 years
Avg HCC Risk Score
1.02
Gender Split
81% female / 19% male
Age Distribution
<65: 28, 65-74: 272, 75-84: 185, 85+: 44

Top Prescribed Drugs (Medicare Part D)

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

What KAREN BROWN, M.D. prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Atorvastatin Calcium
318
Amlodipine Besylate
221
Levothyroxine Sodium
135
Losartan Potassium
99
Lisinopril
98
Omeprazole
91
Escitalopram Oxalate
89
Rosuvastatin Calcium
83
Duloxetine Hcl
81
Hydrochlorothiazide
72

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

Internal Medicine Physician Overview

How KAREN BROWN, M.D. fits within the Internal Medicine Physician landscape nationally.

172,858
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider

KAREN BROWN, M.D.'s 3,750 claims are above the specialty average of 2,716.

Nearby Internal Medicine Physician Providers in Connecticut

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

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

Frequently Asked Questions

What is KAREN BROWN, M.D.'s specialty?
KAREN BROWN, M.D. specializes in Internal Medicine Physician and practices in HAMDEN, Connecticut. Credentials: M.D..
How much does KAREN BROWN, M.D. prescribe under Medicare Part D?
In 2023, KAREN BROWN, M.D. wrote 3,750 Medicare Part D claims totaling $403K in drug costs for 529 beneficiaries.
What is KAREN BROWN, M.D.'s Medicare quality score?
KAREN BROWN, M.D. has a CMS MIPS Final Score of 93.2757/100 (Quality: 81.7219). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is KAREN BROWN, M.D. located?
KAREN BROWN, M.D. is located at 2440 WHITNEY AVE, HAMDEN, CT, 06518. Phone: (203) 288-9650.
What is KAREN BROWN, M.D.'s NPI number?
KAREN BROWN, M.D.'s National Provider Identifier (NPI) is 1285609412, issued on 02/21/2006.
Does KAREN BROWN, M.D. prescribe more brand-name or generic drugs?
KAREN BROWN, M.D.'s prescribing is 10% brand-name and 90% generic drugs by claim count, with $309K in brand drug costs.
Does KAREN BROWN, M.D. prescribe opioids?
Yes, KAREN BROWN, M.D. had 40 opioid claims in 2023 with an opioid prescribing rate of 1.1%.
How many Internal Medicine Physician providers are there in the US?
There are 172,858 Internal Medicine Physician providers across 56 states in the US. The average Internal Medicine Physician provider writes 2,716 Medicare Part D claims per year.
What drugs does KAREN BROWN, M.D. prescribe most often?
Based on 2023 Medicare Part D data, KAREN BROWN, M.D.'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 KAREN BROWN, M.D. accept Medicare?
KAREN BROWN, M.D. appears in CMS Medicare data with 3,750 Part D claims and 529 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify KAREN BROWN, M.D.'s credentials?
KAREN BROWN, M.D.'s NPI is 1285609412 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