JOHN J WARNER, MD

NPI 1831291871, an individual provider in MARSHFIELD, WI 54449.

NPI: 1831291871
Entity type: Individual (type 1)
Status: Active
Practice location: MARSHFIELD, WI 54449
Enumerated: 2006-09-01
Last updated: 2024-09-10

Request

curl https://api.healthcare.dev/v1/providers/1831291871 \
  -H "Authorization: Bearer $HDEV_API_KEY"

NPPES

Taxonomy codes

2085R0202X Primary

Codes from the Health Care Provider Taxonomy code set; their names belong to the NUCC and aren't shown here.

Official record

The CMS NPI Registry is the official source for this NPI: NPI 1831291871 in the NPI Registry.

Use it

Look up 1831291871 from code or an agent

curl

curl https://api.healthcare.dev/v1/providers/1831291871 \
  -H "Authorization: Bearer $HDEV_API_KEY"

MCP prompt

Using the healthcare.dev MCP server, look up NPI 1831291871. Tell me the provider's name, whether it is an individual or an organization, whether the NPI is active, its taxonomy codes and its practice city and state.

Get a free key NPI docs Connect the MCP server

Source: CMS NPPES file, release 2026-11. Public (FOIA-disclosable). Registry data as CMS publishes it, not a verification of credentials, licensure or enrollment.