2026 NPPES data Internal Medicine Physician NPI 1902246804 M.D.
Verify on CMS →

ROBIN CHALKLEY, M.D.

Internal Medicine Physician in LEXINGTON, Kentucky. 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
2K
Medicare Part D claims · 420 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
81%
generic claims · 19% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$640.56
30 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

ROBIN CHALKLEY, M.D. filed 2,335 Medicare Part D claims in 2023 as a Internal Medicine Physician in LEXINGTON, Kentucky, prescribing 81% generic.

2K
Part D claims, 2023
81%
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.

ROBIN CHALKLEY, M.D.'s Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

2,335 Top 14% higher than 86% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). Below this entry. 600–800: 56,224 prescribers (4%). Below this entry. 800–1,000: 40,919 prescribers (3%). Below this entry. 1,000–1,200: 31,827 prescribers (2%). Below this entry. 1,200–1,400: 26,224 prescribers (2%). Below this entry. 1,400–1,600: 21,710 prescribers (2%). Below this entry. 1,600–1,800: 19,072 prescribers (1%). Below this entry. 1,800–2,000: 16,451 prescribers (1%). Below this entry. 2,000–2,200: 213,991 prescribers (16%). This entry sits in this band. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

Each bar is a band; taller bars hold more prescribers. 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 Medicare Part D Prescriber Public Use File · 2023

Board certification likely (heuristic — not verified)

ROBIN CHALKLEY, 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).

What does the federal data show about ROBIN CHALKLEY, M.D.?

Quality data not reported

NPI registry status

Active

Issued 06/25/2013

NPI 1902246804

Primary specialty

Internal Medicine Physician

High-volume

172,858 US NPIs in this specialty

Medicare Part D claims

2,335 14% vs specialty avg

2023 prescription claims

Specialty avg: 2,716

Specialty distribution in Kentucky

How Internal Medicine Physician compares to other specialties among Kentucky providers

Kentucky providers

Internal Medicine Physician share within Kentucky

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

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 CHALKLEY, M.D. is a Internal Medicine Physician provider practicing in LEXINGTON, Kentucky, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: M.D.. NPI: 1902246804. 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 CHALKLEY, M.D. appears in the CMS NPPES registry as a Internal Medicine Physician provider holding M.D. credentials at 1720 NICHOLASVILLE RD STE 400, LEXINGTON, KY, 40503, with a listed phone of (859) 277-5887. NPI 1902246804 was issued on 06/25/2013. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what CHALKLEY 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 2,335 prescription claims written by this provider, covering 420 Medicare beneficiaries and totaling roughly $523K in drug spend, split 19% brand-name and 81% 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

1720 NICHOLASVILLE RD STE 400
LEXINGTON, KY 40503

Provider Details

NPI 1902246804
Specialty Internal Medicine Physician
Credentials M.D.
Gender Male
NPI Issued 06/25/2013

Hospital and facility affiliations

Facilities where ROBIN CHALKLEY, 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.

BAPTIST HEALTH MEDICAL GROUP INC
LEXINGTON, KY

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 ROBIN CHALKLEY, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$641

Largest payer

Lexicon Pharmaceuticals, 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 · Typical

ROBIN CHALKLEY, M.D. — brand share 19.0%
Specialty average (est.)

19% brand-name claims vs 81% generic, on 2,335 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.

2,335
Total Claims
$523K
Total Drug Cost
420
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
6,028
Total Day Supply
180,137
Brand vs Generic
19% brand / 81% generic
Brand Drug Cost
$463K
Generic Drug Cost
$60K

Patient Demographics

Average Patient Age
73.7 years
Avg HCC Risk Score
1.60
Gender Split
48% female / 52% male
Age Distribution
<65: 32, 65-74: 205, 75-84: 140, 85+: 43

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Ezetimibe
414
Rosuvastatin Calcium
278
Atorvastatin Calcium
149
Eliquis
Apixaban
140
Carvedilol
117
Furosemide
90
Metoprolol Succinate
85
Lisinopril
80
Entresto
Sacubitril/Valsartan
73
Jardiance
Empagliflozin
73

* 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 CHALKLEY, 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 CHALKLEY, M.D.'s 2,335 claims are below the specialty average of 2,716.

Nearby Internal Medicine Physician Providers in Kentucky

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

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

Frequently Asked Questions

What is ROBIN CHALKLEY, M.D.'s specialty?
ROBIN CHALKLEY, M.D. specializes in Internal Medicine Physician and practices in LEXINGTON, Kentucky. Credentials: M.D..
How much does ROBIN CHALKLEY, M.D. prescribe under Medicare Part D?
In 2023, ROBIN CHALKLEY, M.D. wrote 2,335 Medicare Part D claims totaling $523K in drug costs for 420 beneficiaries.
Where is ROBIN CHALKLEY, M.D. located?
ROBIN CHALKLEY, M.D. is located at 1720 NICHOLASVILLE RD STE 400, LEXINGTON, KY, 40503. Phone: (859) 277-5887.
What is ROBIN CHALKLEY, M.D.'s NPI number?
ROBIN CHALKLEY, M.D.'s National Provider Identifier (NPI) is 1902246804, issued on 06/25/2013.
Does ROBIN CHALKLEY, M.D. prescribe more brand-name or generic drugs?
ROBIN CHALKLEY, M.D.'s prescribing is 19% brand-name and 81% generic drugs by claim count, with $463K 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 CHALKLEY, M.D. prescribe most often?
Based on 2023 Medicare Part D data, ROBIN CHALKLEY, M.D.'s most frequently prescribed drugs include Ezetimibe, Rosuvastatin Calcium, Atorvastatin Calcium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does ROBIN CHALKLEY, M.D. accept Medicare?
ROBIN CHALKLEY, M.D. appears in CMS Medicare data with 2,335 Part D claims and 420 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify ROBIN CHALKLEY, M.D.'s credentials?
ROBIN CHALKLEY, M.D.'s NPI is 1902246804 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