# Mark H. Johnston, MD

Source: https://ourhealthnetwork.com/doctor/mark-johnston-md-1003898131
NPI: 1003898131
Data source: CMS NPI Registry (DAC), refreshed monthly

## Quick facts

Mark H. Johnston, MD is a gastroenterology based in Lancaster, PA practicing at Regional Gastroenterology Associates Of Lancaster, Ltd. with NPI 1003898131.

## Profile

- Primary specialty: Gastroenterology
- Credential: MD
- Gender: Male
- Medical school: HAHNEMANN UNIVERSITY COLLEGE OF MEDICINE
- Graduation year: 1985
- NPI: 1003898131 ([NPPES record](https://npiregistry.cms.hhs.gov/provider-view/1003898131))

## Practice and contact

- Practice name: Regional Gastroenterology Associates Of Lancaster, Ltd.
- Address: 2112 Harrisburg Pike, Suite 202, Lancaster, PA, 176012644
- Phone: (717) 869-4600
- Group practice size: 260 members

## Insurance accepted (12 networks)

This provider is in network with the following insurance carriers, based on federal Transparency in Coverage filings and FHIR provider directories:

- [Highmark BCBS Pennsylvania](https://ourhealthnetwork.com/insurance/highmark-bcbs-pennsylvania) — 26 plans
- [Cigna](https://ourhealthnetwork.com/insurance/cigna) — 17 plans
- [Highmark BCBS Delaware](https://ourhealthnetwork.com/insurance/highmark-bcbs-delaware) — 11 plans
- [Humana](https://ourhealthnetwork.com/insurance/humana) — 8 plans
- [Aetna](https://ourhealthnetwork.com/insurance/aetna) — 7 plans
- [Highmark BCBS WV](https://ourhealthnetwork.com/insurance/highmark-bcbs-wv) — 6 plans
- [UPMC Health Plan](https://ourhealthnetwork.com/insurance/upmc-health-plan) — 5 plans
- [Capital BC](https://ourhealthnetwork.com/insurance/capital-bc) — 2 plans
- [Highmark BS Pennsylvania](https://ourhealthnetwork.com/insurance/highmark-bs-pennsylvania) — 2 plans
- [Medicare](https://ourhealthnetwork.com/insurance/medicare) — 1 plan
- [UMR](https://ourhealthnetwork.com/insurance/umr) — 1 plan
- [UnitedHealthcare](https://ourhealthnetwork.com/insurance/unitedhealthcare) — 1 plan

To verify a specific plan covers Mark H. Johnston, use the [OurHealthNetwork Insurance Matcher](https://ourhealthnetwork.com/tools/insurance-matcher?npis=1003898131).

## Industry payments disclosure (CMS Open Payments)

Per CMS Open Payments data (most recent year 2024), this provider has received 31 disclosed payments from medical industry sources totaling approximately $672.

Largest disclosed payer: ABBVIE INC. ($285 cumulative).

Source: CMS Open Payments program (federal financial-transparency dataset). Industry payment disclosures do not imply any wrongdoing; many are legitimate consulting fees, research support, or speaker honoraria.

## Related on OurHealthNetwork

- [More Gastroenterology doctors in LANCASTER, PA](https://ourhealthnetwork.com/gastroenterology/pa/lancaster)
- [Find insurance plans that cover this doctor](https://ourhealthnetwork.com/tools/insurance-matcher?npis=1003898131)
- [Browse all 5.5M US healthcare providers](https://ourhealthnetwork.com/find-doctors)
- [About our data and methodology](https://ourhealthnetwork.com/methodology)