Mario Nicholson, MD
NPI 1689735144 · Internal Medicine Physician · Hyattsville, MD
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mario Nicholson, MD is a Internal Medicine Physician provider in Hyattsville, MD (NPI 1689735144).
Provider details
- NPI number
- 1689735144
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- MD21652 (DC)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
3 documented practice locations
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Additional practice locations (2)
- 9000 Woodyard RdClinton, MD 20735-4206Phone: (240) 546-3428
- 6 Garrett AveLa Plata, MD 20646-5959Phone: (301) 539-5100Fax: (301) 934-2084
Registry dates
- Enumerated
- 2006-12-12
- Last updated
- 2025-01-22
- Certified
- 2025-01-22
Frequently asked questions
- What is Mario Nicholson's NPI number?
- Mario Nicholson's National Provider Identifier (NPI) is 1689735144, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mario Nicholson's specialty?
- Mario Nicholson is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mario Nicholson located?
- Mario Nicholson's practice location on file with NPPES is 6525 Belcrest Road, Hyattsville, MD 20782-2016.
- What is Mario Nicholson's phone number?
- The practice phone number listed in the NPPES registry for Mario Nicholson is (301) 209-6155.
- Does Mario Nicholson accept Medicare?
- Mario Nicholson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mario Nicholson's NPI active?
- Yes — Mario Nicholson's NPI (1689735144) is active in the NPPES registry as of the last update on 2025-01-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.