DR. MARIO E NICHOLSON MD
NPI 1689735144
Internal Medicine in Hyattsville, MD
About Dr. Mario E Nicholson Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MARIO E NICHOLSON MD (NPI 1689735144) is an individual internal medicine provider in Hyattsville, Maryland, licensed in Maryland (D41747) and active in the NPI registry since December 2006. He is enrolled in Medicare PECOS and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 2
Other Identifiers 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. Mario E Nicholson Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Mario Nicholson reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Silver Spring, MD 20910
- Reassigned Medicare billing, District of Columbia and Maryland enrollments
- Also billed through NPI 1205087517 (Maryland)
- 184 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 20782 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 9
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
HYATTSVILLE, MD 20782
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 Mario Nicholson's NPI number?
The NPI number for Mario Nicholson is 1689735144. It was assigned to this individual provider in the NPPES registry on December 12, 2006.
Where is Mario Nicholson located?
Mario Nicholson practices at 6525 Belcrest Road Suite 160, Hyattsville, MD 20782. The listed phone number is (301) 209-6155.
What is Mario Nicholson's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Mario Nicholson enrolled in Medicare?
Yes. Mario Nicholson is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Mario Nicholson's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mario Nicholson reassigns Medicare benefits to Patient First Maryland Medical Group PLLC (Silver Spring, MD). The 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 Mario Nicholson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Mario Nicholson was last updated on January 22, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 20 months 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.
# Dr. Mario E Nicholson, MD · NPI 1689735144
Internal Medicine physician in Hyattsville, Maryland. Individual provider, active in the CMS NPPES registry since December 12, 2006.
## Identity
- **NPI:** 1689735144 (Entity type: Individual)
- **Enumerated:** December 12, 2006
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** D41747 (Maryland)
- **Sole proprietor:** No
## Practice location
- **Address:** 6525 BELCREST ROAD, SUITE 160, Hyattsville, MD 20782-2016
- **Phone:** (301) 209-6155 · **Fax:** (301) 209-6206
## 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:** Patient First Maryland Medical Group PLLC (NPI 1265866503, Silver Spring, MD), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** January 22, 2025
- **Other identifiers:** Medicaid 182511900 (MD)
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Source: [NPI Profile](https://npiprofile.com/npi/1689735144) · Data from the CMS NPPES public registry.