2026 NPPES data Cornea and External Diseases Specialist Physician NPI 1689250060 MD
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CASON ROBBINS, MD

Cornea and External Diseases Specialist Physician in DURHAM, North Carolina. 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
51
Medicare Part D claims · 29 beneficiaries · Cornea and External Diseases Specialist Physician avg: 1K
Generic prescribing
65%
generic claims · 35% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$1.1K
14 payments · CMS Open Payments (Sunshine Act)
What the federal data reveals: CASON ROBBINS, MD is a Cornea and External Diseases Specialist Physician ([object Object]) practicing in DURHAM, North Carolina with a Medicare Part D prescribing footprint of 51 claims across 29 beneficiaries — 35% brand-name prescribing . Industry payments of $1.1K across 14 transactions are disclosed under CMS Open Payments (Sunshine Act).

What stands out: CASON ROBBINS, MD filed 51 Medicare Part D claims in 2023 across DURHAM, North Carolina. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

CASON ROBBINS, 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).

CASON ROBBINS, MD at a glance

Quality data not reported

NPI registry status

Active

Issued 03/24/2021

NPI 1689250060

Primary specialty

Cornea and External Diseases Specialist Physician

Rare

294 US NPIs in this specialty

Medicare Part D claims

51 96% vs specialty avg

2023 prescription claims

Specialty avg: 1,232

Specialty distribution in North Carolina

How Cornea and External Diseases Specialist Physician compares to other specialties among North Carolina providers

North Carolina providers

Cornea and External Diseases Specialist Physician share within North Carolina

1. Cornea and External Diseases Specialist Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Cornea and External Diseases Specialist Physician share within North Carolina

Specialty board-certification context

Estimated specialty board-certified rate — Cornea and External Diseases Specialist Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Cornea and External Diseases Specialist Physician ABMS/AOA estimate

Est. board-certified rate (Cornea and External Diseases Specialist Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Cornea and External Diseases Specialist 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).

CASON ROBBINS, MD is a Cornea and External Diseases Specialist Physician provider practicing in DURHAM, North Carolina, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD. NPI: 1689250060. 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.

CASON ROBBINS, MD appears in the CMS NPPES registry as a Cornea and External Diseases Specialist Physician provider holding MD credentials at 2351 ERWIN RD, DURHAM, NC, 27705, with a listed phone of (919) 681-3937. NPI 1689250060 was issued on 03/24/2021. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what ROBBINS 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 51 prescription claims written by this provider, covering 29 Medicare beneficiaries and totaling roughly $4K in drug spend, split 35% brand-name and 65% 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.

Cornea and External Diseases Specialist Physician is a narrow specialty nationwide, with 294 enrolled providers across 43 states and an average of 1,232 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

2351 ERWIN RD
DURHAM, NC 27705

Provider Details

NPI 1689250060
Specialty Cornea and External Diseases Specialist Physician
Credentials MD
Gender Male
NPI Issued 03/24/2021

Hospital and facility affiliations

Facilities where CASON ROBBINS, 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.

DUKE HEALTH INTEGRATED PRACTICE INC
DURHAM, NC

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

Industry payments received (2024) — CMS Open Payments transparency data

The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for CASON ROBBINS, MD. Source: openpaymentsdata.cms.gov.

Total received

$1.1K

Largest payer

BIOTISSUE HOLDINGS INC.

Most common payment type

Food and Beverage

Industry payments are not necessarily indicators of bias — they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.

Brand vs generic prescribing mix · Above average

CASON ROBBINS, MD — brand share 35.0%
Specialty average (est.)

35% brand-name claims vs 65% generic, on 51 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.

51
Total Claims
$4K
Total Drug Cost
29
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
72
Total Day Supply
1,667
Brand vs Generic
35% brand / 65% generic
Brand Drug Cost
$4K
Generic Drug Cost
$599

Patient Demographics

Average Patient Age
76.2 years
Avg HCC Risk Score
0.97
Gender Split
59% female / 41% male

Cornea and External Diseases Specialist Physician Overview

How CASON ROBBINS, MD fits within the Cornea and External Diseases Specialist Physician landscape nationally.

294
Cornea and External Diseases Specialist Physician Providers in US
43
States with Cornea and External Diseases Specialist Physician
1,232
Avg Claims per Provider

CASON ROBBINS, MD's 51 claims are below the specialty average of 1,232.

Nearby Cornea and External Diseases Specialist Physician Providers in North Carolina

Other clinicians with the same primary specialty enrolled in North Carolina, drawn from the same CMS NPPES roster as ROBBINS.

Compare Cornea and External Diseases Specialist Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is CASON ROBBINS, MD's specialty?
CASON ROBBINS, MD specializes in Cornea and External Diseases Specialist Physician and practices in DURHAM, North Carolina. Credentials: MD.
How much does CASON ROBBINS, MD prescribe under Medicare Part D?
In 2023, CASON ROBBINS, MD wrote 51 Medicare Part D claims totaling $4K in drug costs for 29 beneficiaries.
Where is CASON ROBBINS, MD located?
CASON ROBBINS, MD is located at 2351 ERWIN RD, DURHAM, NC, 27705. Phone: (919) 681-3937.
What is CASON ROBBINS, MD's NPI number?
CASON ROBBINS, MD's National Provider Identifier (NPI) is 1689250060, issued on 03/24/2021.
Does CASON ROBBINS, MD prescribe more brand-name or generic drugs?
CASON ROBBINS, MD's prescribing is 35% brand-name and 65% generic drugs by claim count, with $4K in brand drug costs.
How many Cornea and External Diseases Specialist Physician providers are there in the US?
There are 294 Cornea and External Diseases Specialist Physician providers across 43 states in the US. The average Cornea and External Diseases Specialist Physician provider writes 1,232 Medicare Part D claims per year.
Does CASON ROBBINS, MD accept Medicare?
CASON ROBBINS, MD appears in CMS Medicare data with 51 Part D claims and 29 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify CASON ROBBINS, MD's credentials?
CASON ROBBINS, MD's NPI is 1689250060 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