Dr. Mark A. Riddle, MD
- Part D claims, 2019
- 34
- Publications
- 41
- Industry payments
- $124
- State license
- 1
- Year NPI issued
- 2006
- Practice address
- 5500 Knoll North Dr Ste 370, Columbia, MD 21045-2393
- Practice phone
- Call (410) 837-2050
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Riddle's professional email, personal email and mobile number
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Dr. Mark A. Riddle is a child and adolescent psychiatrist in Columbia, Maryland
Dr. Riddle practices in Columbia, Maryland.
Dr. Riddle's NPI, 1316989304, was assigned on June 12, 2006. Dr. Riddle holds Maryland license D0045696.
- NPI
- 1316989304NPI Registry (opens in a new tab)
- NPI enumeration date
- June 12, 2006
- NPI status
- Active
- Practice phone
- (410) 837-2050
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
Sources: NPPES NPI Registry (CMS); and Dmand AI Professional Profile Data
Dr. Mark A. Riddle's practice address is in Columbia, Maryland
Dr. Riddle's practice address in the NPI Registry is 5500 Knoll North Dr Ste 370, Columbia, MD 21045-2393. The practice phone is (410) 837-2050.
- NPI Registry address5500 Knoll North Dr Ste 370, Columbia, MD 21045-2393Phone(410) 837-2050
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dmand AI tracks the EHR system at Dr. Mark A. Riddle's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Riddle practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dr. Riddle's practice | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Mark A. Riddle is one of 140 childs and adolescent psychiatrists in Maryland
Child and adolescent psychiatry is Dr. Riddle's primary specialty in the NPI Registry, under taxonomy code 2084P0804X. Dr. Riddle is licensed in Maryland.
Specialties and state licenses
- Child and adolescent psychiatry, MarylandPrimary
Childs and adolescent psychiatrists near Dr. Riddle
Counts of childs and adolescent psychiatrists 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. Mark A. Riddle wrote 34 Medicare Part D claims in 2019
In 2019, Dr. Riddle wrote 34 Medicare Part D claims. Every claim was for a generic drug. They cover 2 drugs, with $1,301 in total drug cost. In 2018, CMS named 43 claims across 2 drugs.
Dr. Riddle's most prescribed drugs by claims, 2019
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, 2018 to 2019
- 2018
- 2019
- Claims for drugs CMS names
- 2018: 432019: 3421%
Drugs named by CMS: 2 in 2019, 2 in 2018.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Mark A. Riddle has 41 publications on record
Dmand AI links 41 papers to Dr. Riddle, published from 2011 to 2025. 2014 was the busiest year, with 7. The most frequent topics are Obsessive-Compulsive Disorder, Antipsychotic Agents and Attention Deficit Disorder with Hyperactivity. Dr. Riddle has published most often in J Am Acad Child Adolesc Psychiatry. Dr. Riddle's most frequent co-authors are Gerald Nestadt, MD, Marco A. Grados, MD and Benjamin David Greenberg, MD, PhD.
Dr. Riddle's papers by year, 2014 to 2025
Topics Dr. Riddle writes about most
- Obsessive-Compulsive Disorder
- Antipsychotic Agents
- Attention Deficit Disorder with Hyperactivity
- Primary Health Care
- Depression
- Diagnostic and Statistical Manual of Mental Disorders
- Genetic Predisposition to Disease
- Mental Health
Dr. Riddle's most frequent co-authors
- Gerald Nestadt, MD17 shared papers
- Marco A. Grados, MD16 shared papers
- Benjamin David Greenberg, MD, PhD16 shared papers
Recent publications by Dr. Riddle
J Am Acad Child Adolesc Psychiatry
J Psychiatr Res
Psychiatr Serv
See who Dr. Riddle researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Riddle works with, so you can find a warm path to the right childs and adolescent psychiatrists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Mark A. Riddle received $124 in industry payments in 2017
CMS Open Payments shows 1 general payment to Dr. Riddle from 1 drug or device company in 2017. Food and beverage make up the largest share, 100% of the total. Valeant Pharmaceuticals International paid the most, $124.
Companies that paid Dr. Riddle the most, 2017 to 2017
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Mark A. Riddle'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 |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. Mark A. Riddle
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What is Dr. Mark A. Riddle's NPI number?
Dr. Mark A. Riddle's NPI number is 1316989304. It was assigned on June 12, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark A. Riddle?
Dr. Mark A. Riddle is a child and adolescent psychiatrist in Columbia, Maryland. The primary specialty in the NPI Registry is Child & Adolescent Psychiatry Physician (taxonomy code 2084P0804X).
Where does Dr. Mark A. Riddle practice?
Dr. Riddle practices at 5500 Knoll North Dr Ste 370, Columbia, MD 21045-2393.
What is Dr. Mark A. Riddle's office phone number?
The practice phone on file for Dr. Riddle is (410) 837-2050.
What is Dr. Mark A. Riddle's medical license number?
Dr. Riddle holds Maryland license D0045696.
What drugs does Dr. Mark A. Riddle prescribe most?
In 2019 Medicare Part D data, Dr. Riddle's most prescribed drugs by claims were Fluoxetine HCl and Aripiprazole.
Has Dr. Mark A. Riddle received payments from drug or device companies?
CMS Open Payments shows $124 in general payments to Dr. Riddle from 1 company from 2017 to 2017. The largest total came from Valeant Pharmaceuticals International.
How long has Dr. Mark A. Riddle been practicing?
Dr. Riddle's NPI was assigned in 2006.
Does Dr. Mark A. Riddle do research?
Dmand AI links 41 publications to Dr. Riddle, published from 2011 to 2025.
Who does Dr. Mark A. Riddle publish with?
Dr. Riddle's most frequent co-authors are Gerald Nestadt, MD (17 shared papers), Marco A. Grados, MD (16 shared papers) and Benjamin David Greenberg, MD, PhD (16 shared papers).
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