2026 NPPES data Internal Medicine Physician NPI 1629068440 M.D.
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ROBIN ALLEN, M.D.

Internal Medicine Physician in WATERBURY, 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
124
Medicare Part D claims · 38 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
89%
generic claims · 11% brand-name · higher generic rates reduce patient out-of-pocket costs
What the federal data reveals: ROBIN ALLEN, M.D. is a Internal Medicine Physician ([object Object]) practicing in WATERBURY, Connecticut with a Medicare Part D prescribing footprint of 124 claims across 38 beneficiaries — 11% brand-name prescribing .

What stands out: ROBIN ALLEN, M.D. filed 124 Medicare Part D claims in 2023 across WATERBURY, Connecticut. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

ROBIN ALLEN, M.D. 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).

ROBIN ALLEN, M.D. at a glance

Quality data not reported

NPI registry status

Active

Issued 10/24/2005

NPI 1629068440

Primary specialty

Internal Medicine Physician

High-volume

172,858 US NPIs in this specialty

Medicare Part D claims

124 95% vs specialty avg

2023 prescription claims

Specialty avg: 2,716

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

Specialty board-certification context

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

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

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

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

ROBIN ALLEN, M.D. is a Internal Medicine Physician provider practicing in WATERBURY, Connecticut, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: M.D.. NPI: 1629068440. 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.

ROBIN ALLEN, M.D. appears in the CMS NPPES registry as a Internal Medicine Physician provider holding M.D. credentials at 2000 N MAIN ST STE A, WATERBURY, CT, 06704, with a listed phone of (203) 951-8306. NPI 1629068440 was issued on 10/24/2005. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what ALLEN 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 124 prescription claims written by this provider, covering 38 Medicare beneficiaries and totaling roughly $20K in drug spend, split 11% brand-name and 89% 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.

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

2000 N MAIN ST STE A
WATERBURY, CT 06704

Provider Details

NPI 1629068440
Specialty Internal Medicine Physician
Credentials M.D.
Gender Female
NPI Issued 10/24/2005

Hospital and facility affiliations

Facilities where ROBIN ALLEN, 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.

NOVA PHYSICIAN GROUP PLLC
WATERBURY, 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

ROBIN ALLEN, M.D. — brand share 11.0%
Specialty average (est.)

11% brand-name claims vs 89% generic, on 124 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.

124
Total Claims
$20K
Total Drug Cost
38
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
278
Total Day Supply
7,799
Brand vs Generic
11% brand / 89% generic
Brand Drug Cost
$17K
Generic Drug Cost
$3K

Patient Demographics

Average Patient Age
75.2 years
Avg HCC Risk Score
3.12
Gender Split
37% female / 63% 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
Atorvastatin Calcium
13
Amlodipine Besylate
11

* 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 ROBIN ALLEN, 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

ROBIN ALLEN, M.D.'s 124 claims are below 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 ALLEN.

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

Frequently Asked Questions

What is ROBIN ALLEN, M.D.'s specialty?
ROBIN ALLEN, M.D. specializes in Internal Medicine Physician and practices in WATERBURY, Connecticut. Credentials: M.D..
How much does ROBIN ALLEN, M.D. prescribe under Medicare Part D?
In 2023, ROBIN ALLEN, M.D. wrote 124 Medicare Part D claims totaling $20K in drug costs for 38 beneficiaries.
Where is ROBIN ALLEN, M.D. located?
ROBIN ALLEN, M.D. is located at 2000 N MAIN ST STE A, WATERBURY, CT, 06704. Phone: (203) 951-8306.
What is ROBIN ALLEN, M.D.'s NPI number?
ROBIN ALLEN, M.D.'s National Provider Identifier (NPI) is 1629068440, issued on 10/24/2005.
Does ROBIN ALLEN, M.D. prescribe more brand-name or generic drugs?
ROBIN ALLEN, M.D.'s prescribing is 11% brand-name and 89% generic drugs by claim count, with $17K in brand drug costs.
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 ROBIN ALLEN, M.D. prescribe most often?
Based on 2023 Medicare Part D data, ROBIN ALLEN, M.D.'s most frequently prescribed drugs include Atorvastatin Calcium, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does ROBIN ALLEN, M.D. accept Medicare?
ROBIN ALLEN, M.D. appears in CMS Medicare data with 124 Part D claims and 38 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify ROBIN ALLEN, M.D.'s credentials?
ROBIN ALLEN, M.D.'s NPI is 1629068440 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