NPI Lookup · Medicare billing profile

Robert Muldoon, M.D.

Hematology & Oncology Physician · Hot Springs, AR · NPI 1841277589. Below: what a registry shows, plus the 2024 Medicare billing context no registry clone carries.

$3.7M
Est. Medicare paid, 2024
252,590
Services billed, 2024
73
Distinct codes billed, 2024
2024
Latest CMS data year

Registry record (NPPES)

NPI1841277589
TypeIndividual clinician
SpecialtyHematology & Oncology Physician
Practice address133 Harmony Park
City / State / ZIPHot Springs, AR 71913

Top billed codes (2024)

J0881Injection, darbepoetin alfa, 1 microgram (non-esrd use)76,200 · $177K
J9271Injection, pembrolizumab, 1 mg32,600 · $1.5M
J9299Injection, nivolumab, 1 mg30,685 · $755K
Q9967Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml18,300 · $2K
Q5125Injection, filgrastim-ayow, biosimilar, (releuko), 1 microgram16,080 · $6K

Top 5 of 73 codes billed in 2024. Services · est. Medicare paid. The full list is one search in the app.

Reported industry relationships (2025)

Manufacturers with disclosed Open Payments records naming this provider in 2025: AstraZeneca Pharmaceuticals LP · Novartis Pharmaceuticals Corporation · PFIZER INC. · Celgene Corporation · Exelixis Inc. · and 36 more.

Also appears in Open Payments research records (funding associated with studies, not personal payments).

A payment record is a disclosed relationship under the Sunshine Act, not evidence this provider uses a product. Detail is in the app.

Part D prescribing (2024)

Hydrocodone/Acetaminophen126 claims
Anastrozole119 claims
Ondansetron105 claims
Prednisone103 claims
Pantoprazole Sodium93 claims

Top 5 drugs by Medicare Part D claim count. Drug-year lines under 11 claims are suppressed by CMS, so this understates low-volume prescribing.

This is the public slice. Year-over-year history, every code, payment detail, group affiliations, and phone numbers for Robert Muldoon are one search in Prospect 811.

Where this data comes from. Provider identity, specialty, and practice location come from CMS's public NPPES registry (the National Plan & Provider Enumeration System), the official record of every NPI ever issued. Deactivated NPIs are excluded. Addresses are what the provider filed and can lag a move. Where a profile shows Medicare context, it comes from CMS's public utilization, Part D, and Open Payments files: traditional Medicare fee-for-service only, and CMS suppresses any provider-and-code line under 11 beneficiaries before publishing. An Open Payments record is a disclosed relationship, not evidence a clinician uses a product. Prospect 811 organizes public data; it doesn't add to or alter it. Not affiliated with or endorsed by CMS. Full detail on the data page.

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