Dr. Mario E. Nicholson, MD
- Part D claims, 2024
- 41
- Medical group
- 1
- State licenses
- 2
- Year NPI issued
- 2006
- Practice address
- 9000 Woodyard Rd, Clinton, MD 20735
- Practice phone
- Call (240) 546-3428
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Patient First Maryland Medical Group
Clinton, Maryland
Find Dr. Nicholson's professional email, personal email and mobile number
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Dr. Mario E. Nicholson is an internist in Clinton, Maryland
Dr. Nicholson practices at Patient First Maryland Medical Group in Clinton, Maryland.
Dr. Nicholson's NPI, 1689735144, was assigned on December 12, 2006. Dr. Nicholson graduated from Icahn School of Medicine at Mount Sinai in 1983. Dr. Nicholson holds Maryland license D41747.
- NPI
- 1689735144NPI Registry (opens in a new tab)
- NPI enumeration date
- December 12, 2006
- NPI status
- Active
- Practice phone
- (240) 546-3428
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 69
- Medical school graduation
- 1983
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Mario E. Nicholson practices at Patient First Maryland Medical Group in Clinton, Maryland
Dr. Nicholson's primary practice is Patient First Maryland Medical Group, at 9000 Woodyard Rd, Clinton, MD 20735 in Prince Georges County. The practice phone is (240) 546-3428.
- Patient First Maryland Medical Group9000 Woodyard Rd, Clinton, MD 20735 · Prince Georges CountyPhone(240) 546-3428
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Mario E. Nicholson is affiliated with 1 site of care and 1 medical group
Dr. Nicholson's primary practice is Patient First Maryland Medical Group in Clinton, Maryland. The medical group on file is Patient First.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Mario E. Nicholson's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Nicholson practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Patient First Maryland Medical Group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Mario E. Nicholson is one of 3,320 internists in Maryland
Internal medicine is Dr. Nicholson's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dmand AI has Dr. Nicholson's licenses on file in 2 states: Maryland and District of Columbia.
Specialties and state licenses
- Internal medicine, MarylandPrimary
- District of Columbia license
Internists near Dr. Nicholson
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Mario E. Nicholson's patients have a median age of 61
Across all payers, Dmand AI patient panel data puts Dr. Nicholson's median patient age at 61, with 50% women.
Dr. Nicholson's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 61
Patient panel by sex, all payers
- Women50%
- Men50%
Source: Dmand AI Patient Panel Data
Dr. Mario E. Nicholson wrote 41 Medicare Part D claims in 2024
In 2024, Dr. Nicholson wrote 41 Medicare Part D claims for 17 patients. 78% of them were for generic drugs. They cover 24 drugs, with $32,573 in total drug cost. In 2022, CMS named 1,032 claims across 41 drugs.
Dr. Nicholson's Part D claims by kind of drug, 2024
- Generic32 claims78%
- Brand-name and other9 claims22%
Dr. Nicholson's most prescribed drugs by claims, 2023
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2022 to 2023
- 2022
- 2023
- Claims for drugs CMS names
- 2022: 1,0322023: 51550%
Drugs named by CMS: 24 in 2023, 41 in 2022.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
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Dr. Mario E. Nicholson graduated from Icahn School of Medicine at Mount Sinai
Dr. Nicholson graduated from Icahn School of Medicine at Mount Sinai in 1983.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Mario E. Nicholson's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Mario E. Nicholson
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Mario E. Nicholson's NPI number?
Dr. Mario E. Nicholson's NPI number is 1689735144. It was assigned on December 12, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Mario E. Nicholson?
Dr. Mario E. Nicholson is an internist in Clinton, Maryland. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Mario E. Nicholson practice?
Dr. Nicholson practices at 9000 Woodyard Rd, Clinton, MD 20735. Dr. Nicholson's primary practice is Patient First Maryland Medical Group in Clinton, Maryland.
What is Dr. Mario E. Nicholson's office phone number?
The practice phone on file for Dr. Nicholson is (240) 546-3428.
What is Dr. Mario E. Nicholson's medical license number?
Dr. Nicholson holds Maryland license D41747, one of the licenses on file in 2 states.
Which states has Dr. Mario E. Nicholson been licensed in?
Dmand AI has state licenses on file for Dr. Nicholson in Maryland and District of Columbia.
What medical group is Dr. Mario E. Nicholson part of?
Dr. Nicholson is linked to Patient First.
Where did Dr. Mario E. Nicholson go to medical school?
Dr. Nicholson graduated from Icahn School of Medicine at Mount Sinai in 1983.
What drugs does Dr. Mario E. Nicholson prescribe most?
In 2023 Medicare Part D data, Dr. Nicholson's most prescribed drugs by claims were Lisinopril, Amlodipine Besylate and Atorvastatin Calcium.
How long has Dr. Mario E. Nicholson been practicing?
Dr. Nicholson graduated from medical school in 1983, 43 years ago.
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