NPI Lookup · Medicare billing profile

Chad Ronholm, M.D.

Emergency Medical Services (Emergency Medicine) Physician · Saint Louis, MO · NPI 1306027909. Below: what a registry shows, plus the 2024 Medicare billing context no registry clone carries.

Registry record (NPPES)

NPI1306027909

TypeIndividual clinician

SpecialtyEmergency Medical Services (Emergency Medicine) Physician

Practice address520 S Elm Ave

City / State / ZIPSaint Louis, MO 63119

Top billed codes (2024)

J3262Injection, tocilizumab, 1 mg83,080 · $390K

J1602Injection, golimumab, 1 mg, for intravenous use39,350 · $359K

J0717Injection, certolizumab pegol, 1 mg (code may be used for medicare when drug administered under the direct supervision of a physician, not for use when drug is self administered)38,001 · $137K

J0129Injection, abatacept, 10 mg (code may be used for medicare when drug administered under the direct supervision of a physician, not for use when drug is self administered)21,500 · $729K

J3247Injection, secukinumab, intravenous, 1 mg18,131 · $249K

Top 5 of 26 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: Takeda Pharmaceuticals U.S.A., Inc. · ABBVIE INC. · Janssen Biotech, Inc. · UCB, Inc. · Amgen Inc. · and 23 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)

Methotrexate Sodium442 claims

Pregabalin277 claims

Tramadol Hcl275 claims

Hydroxychloroquine Sulfate257 claims

Prednisone230 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 Chad Ronholm 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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