MARK D HARDING MD
NPI 1821042466
Emergency Medicine in Ronan, MT
About Mark D Harding Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARK D HARDING MD (NPI 1821042466) is an individual emergency medicine provider in Ronan, Montana, licensed in Montana (8030) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 2
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Mark D Harding Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Mark Harding reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Ronan, MT 59864
- Reassigned Medicare billing, Montana enrollment
- 77 clinicians in this Medicare group
Libby, MT 59923
- Reassigned Medicare billing, Montana enrollment
- Medicare enrollment name: St Johns Lutheran Hospital Inc
- 67 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 59864 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Mark Harding's NPI number?
The NPI number for Mark Harding is 1821042466. It was assigned to this individual provider in the NPPES registry on May 19, 2006.
Where is Mark Harding located?
Mark Harding practices at 107 6th Ave SW, Ronan, MT 59864. The listed phone number is (406) 676-4441.
What is Mark Harding's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Mark Harding enrolled in Medicare?
Yes. Mark Harding is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Mark Harding's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mark Harding reassigns Medicare benefits to 2 organizations: St Lukes Community Hospital (Ronan, MT) and St. John's Lutheran Hospital, Inc. (Libby, MT). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Mark Harding's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Mark Harding accept?
Health plans from Blue Cross and Blue Shield of Montana and Mountain Health CO-OP list Mark Harding as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Mark Harding was last updated on June 19, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Mark D Harding, MD · NPI 1821042466
Emergency Medicine physician in Ronan, Montana. Individual provider, active in the CMS NPPES registry since May 19, 2006.
## Identity
- **NPI:** 1821042466 (Entity type: Individual)
- **Enumerated:** May 19, 2006
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 8030 (Montana)
- **Sole proprietor:** No
## Practice location
- **Address:** 107 6TH AVE SW, Ronan, MT 59864-2634
- **Phone:** (406) 676-4441 · **Fax:** (406) 676-0835
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): St Lukes Community Hospital (NPI 1154566271, Ronan, MT); St. John's Lutheran Hospital, Inc. (NPI 1952312050, Libby, MT) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** June 19, 2013
- **Other identifiers:** Other 1821042466 (MT); Medicaid 1821042466 (MT)
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Source: [NPI Profile](https://npiprofile.com/npi/1821042466) · Data from the CMS NPPES public registry.