2026 NPPES data Pharmacist NPI 1619250602 RPH
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THOMAS DARBY, RPH

Pharmacist in NEW CASTLE, Delaware. 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
22
Medicare Part D claims · 19 beneficiaries · Pharmacist avg: 135
Generic prescribing
0%
generic claims · 100% brand-name · higher generic rates reduce patient out-of-pocket costs
What the federal data reveals: THOMAS DARBY, RPH is a Pharmacist ([object Object]) practicing in NEW CASTLE, Delaware with a Medicare Part D prescribing footprint of 22 claims across 19 beneficiaries — 100% brand-name prescribing .

What stands out: THOMAS DARBY, RPH filed 22 Medicare Part D claims in 2023 across NEW CASTLE, Delaware. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

THOMAS DARBY, RPH at a glance

Quality data not reported

NPI registry status

Active

Issued 09/26/2011

NPI 1619250602

Primary specialty

Pharmacist

High-volume

290,447 US NPIs in this specialty

Medicare Part D claims

22 84% vs specialty avg

2023 prescription claims

Specialty avg: 135

Specialty distribution in Delaware

How Pharmacist compares to other specialties among Delaware providers

Delaware providers

Pharmacist share within Delaware

1. Pharmacist42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Pharmacist share within Delaware

Specialty board-certification context

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

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

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

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

THOMAS DARBY, RPH is a Pharmacist provider practicing in NEW CASTLE, Delaware, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: RPH. NPI: 1619250602. 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.

THOMAS DARBY, RPH appears in the CMS NPPES registry as a Pharmacist provider holding RPH credentials at 287 CHRISTIANA RD STE 17A, NEW CASTLE, DE, 19720, with a listed phone of (302) 325-1098. NPI 1619250602 was issued on 09/26/2011. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what DARBY 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 22 prescription claims written by this provider, covering 19 Medicare beneficiaries and totaling roughly $5K in drug spend, split 100% brand-name and 0% 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.

Pharmacist is a high-volume specialty nationwide, with 290,447 enrolled providers across 56 states and an average of 135 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

287 CHRISTIANA RD STE 17A
NEW CASTLE, DE 19720

Provider Details

NPI 1619250602
Specialty Pharmacist
Credentials RPH
Gender Male
NPI Issued 09/26/2011

Brand vs generic prescribing mix · Brand-heavy

THOMAS DARBY, RPH — brand share 100.0%
Specialty average (est.)

100% brand-name claims vs 0% generic, on 22 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.

22
Total Claims
$5K
Total Drug Cost
19
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
22
Total Day Supply
22
Brand vs Generic
100% brand / 0% generic
Brand Drug Cost
$5K
Generic Drug Cost
$0

Patient Demographics

Average Patient Age
74.7 years
Avg HCC Risk Score
0.72
Age Distribution
<65: 0, 65-74: N/A, 75-84: N/A, 85+: N/A

Pharmacist Overview

How THOMAS DARBY, RPH fits within the Pharmacist landscape nationally.

290,447
Pharmacist Providers in US
56
States with Pharmacist
135
Avg Claims per Provider

THOMAS DARBY, RPH's 22 claims are below the specialty average of 135.

Nearby Pharmacist Providers in Delaware

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

Compare Pharmacist nationally: see state-by-state distribution →

Frequently Asked Questions

What is THOMAS DARBY, RPH's specialty?
THOMAS DARBY, RPH specializes in Pharmacist and practices in NEW CASTLE, Delaware. Credentials: RPH.
How much does THOMAS DARBY, RPH prescribe under Medicare Part D?
In 2023, THOMAS DARBY, RPH wrote 22 Medicare Part D claims totaling $5K in drug costs for 19 beneficiaries.
Where is THOMAS DARBY, RPH located?
THOMAS DARBY, RPH is located at 287 CHRISTIANA RD STE 17A, NEW CASTLE, DE, 19720. Phone: (302) 325-1098.
What is THOMAS DARBY, RPH's NPI number?
THOMAS DARBY, RPH's National Provider Identifier (NPI) is 1619250602, issued on 09/26/2011.
Does THOMAS DARBY, RPH prescribe more brand-name or generic drugs?
THOMAS DARBY, RPH's prescribing is 100% brand-name and 0% generic drugs by claim count, with $5K in brand drug costs.
How many Pharmacist providers are there in the US?
There are 290,447 Pharmacist providers across 56 states in the US. The average Pharmacist provider writes 135 Medicare Part D claims per year.
Does THOMAS DARBY, RPH accept Medicare?
THOMAS DARBY, RPH appears in CMS Medicare data with 22 Part D claims and 19 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify THOMAS DARBY, RPH's credentials?
THOMAS DARBY, RPH's NPI is 1619250602 with credentials RPH. 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