# Mark Riddle, MD · NPI 1316989304

Child & Adolescent Psychiatrist · Columbia, MD · NPI 1316989304

Mark Riddle, MD (NPI 1316989304) is listed in the NPPES registry with the specialty Child & Adolescent Psychiatrist in Columbia, MD, phone (410) 837-2050, as of the registry file of Jun 8, 2026.

Profile: https://www.gale.care/providers/md/columbia/mark-riddle-md-1316989304
Facts changed: 2026-06-08 · hash ee7c067c6a69087a

## Facts

- Name: Mark Riddle (NPPES registry, self-reported, 2026-06-08) {#name}
- Credential: MD (NPPES registry, self-reported, 2026-06-08) {#credential}
- Specialty: Child & Adolescent Psychiatrist (NPPES registry, self-reported, 2026-06-08) {#specialty}
- Registry stage: as-listed (NPPES registry, self-reported, 2026-06-08) {#registry-stage}
- NPI issued: 2006 (NPPES registry, listed, 2026-06-08) {#npi-issued}
- Practice type: sole-proprietor (NPPES registry, self-reported, 2026-06-08) {#practice-type}
- City: Columbia (NPPES registry, self-reported, 2026-06-08) {#city}
- State: MD (NPPES registry, self-reported, 2026-06-08) {#state}
- Phone: (410) 837-2050 (NPPES registry, self-reported, 2026-06-08) {#phone}

## Answers

- New patients (not on record): Gale has no record of whether Mark Riddle, MD (NPI 1316989304) is taking new patients. Ask the office.
- Insurance (not on record): Gale has no record of which insurance Mark Riddle, MD (NPI 1316989304) takes. Ask the office.
- First-visit cost (not on record): Gale has no record of what a first visit with Mark Riddle, MD (NPI 1316989304) costs. Paying yourself? You can ask for a written Good Faith Estimate before the visit.
- Video visits (not on record): Gale has no record of whether Mark Riddle, MD (NPI 1316989304) offers video visits. Ask the office.
- Where (self-reported): Mark Riddle, MD (NPI 1316989304) is listed in Columbia, MD by the NPPES registry, as of the registry file of Jun 8, 2026.
- Who they see (not on record): Gale has no record of who Mark Riddle, MD (NPI 1316989304) sees. Ask the office.
- What they help with (not on record): Gale has no record of what Mark Riddle, MD (NPI 1316989304) helps with beyond the registry specialty. Ask the office.
- Languages (not on record): Gale has no record of the languages Mark Riddle, MD (NPI 1316989304) speaks. Ask the office.
- How to book (self-reported): Call (410) 837-2050, the practice phone the NPPES registry lists for Mark Riddle, MD (NPI 1316989304) (Jun 8, 2026).
- Next opening (not on record): Gale has no record of the next opening for Mark Riddle, MD (NPI 1316989304). Ask the office.

## Sources

- NPPES registry (CMS): file of 2026-06-08 · https://npiregistry.cms.hhs.gov/provider-view/1316989304

## About these facts

- Status words: How each fact is known. confirmed = Listed: a named directory, CMS file or state file lists it. inferred = Likely: a price file suggests it; a likely match is a lead, not a listing. self-reported: the clinician said it, to the NPPES registry or on Gale. not-listed: a source that lists every clinician it covers was read and does not list this one; that is not a no. unknown: no record; ask the office.
- Dates: The date the source gives this record (YYYY-MM-DD). It is not the date of the event the record describes: an opt-out states its own start and end dates in its sentence.
- Hash: Changes only when a fact changes, never on a re-check.

This provider is not affiliated with Gale. This listing is compiled from the NPPES public registry (CMS).
Terms: https://www.gale.care/agents#terms