NPPES file of Aug 9, 2026

John Chase Callon, ADT

Addiction (Substance Use Disorder) Counselor · Frederick, MD

John Chase Callon, ADT is an addiction (substance use disorder) counselor with a practice address in Frederick, Maryland, and NPI 1528639598, issued on Jul 9, 2021. Check the license (Maryland ADT2211, as entered in NPPES) with the Maryland board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1528639598
Name
John Chase Callon
Credential
ADT
Primary taxonomy
Addiction (Substance Use Disorder) Counselor 101YA0400X
License number
ADT2211 MD
Self-reported in NPPES; status is on the state search
Practice location
201 Broadway St Ste 110, Frederick, MD 21701
Phone
(240) 801-7799
Enumerated
Jul 9, 2021
Record last updated
Jul 9, 2021 (not updated in 5 years: call before relying on the address or phone)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest addiction (substance use disorder) counselor records → All 1,165 in Maryland → Look up another NPI →

Also registered at 201 Broadway St Ste 110

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Margaret Dwyer, LMSWSocial Worker1588252001
  2. Regine GarrettSocial Worker1588241616
  3. Joseph Hodge, LCPCMental Health Counselor1932855947
  4. Lea ParisAddiction (Substance Use Disorder) Counselor1114667524
  5. Margaret Valentino, CSC-ADAddiction (Substance Use Disorder) Counselor1326615303
  6. Nathaniel YoungAddiction (Substance Use Disorder) Counselor1518762392

Verify John Chase Callon in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Maryland board licenses this profession
    Search for license ADT2211    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the Maryland license search

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John Chase Callon among 1,165 addiction (substance use disorder) counselor records in Maryland

John Chase Callon, ADT is one of 1,165 addiction (substance use disorder) counselor records with a practice address in Maryland. 2% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2021, is newer than 63% of them.

  • NPI issued2021 · 63% of these records are older, 30% newer
  • In a Medicare fileNo · 2% of these records are
  • In the CMS Doctors and Clinicians fileNo · 3% of these records are
  • Record last updated2021 · 62% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 101YA0400X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Addiction (Substance Use Disorder) Counselor providers in Maryland

There are 1,165 addiction (substance use disorder) counselor records in Maryland. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 1,165 in Maryland → Every provider in Frederick → Addiction (Substance Use Disorder) Counselor nationwide →

The 8 addiction (substance use disorder) counselor records with the nearest ZIP codes

  1. Vanessa Bowens, ADTFrederick, MD 217011013673300
  2. David Brooks, LCADCFrederick, MD 217011245751379
  3. Melanie Fay, CCDC, CACADFrederick, MD 217011295858017
  4. Susan Gordon, LCADC-CFrederick, MD 217011376030122
  5. Francesca HerderFrederick, MD 217011326727132
  6. Jessica Leer, M.S.Frederick, MD 217011972844454
  7. Ingrid Matthews, LCADC (MARYLAND)Frederick, MD 217011194273177
  8. Jill Maynes, LMSWFrederick, MD 217011902585011

Common questions

What is John Chase Callon, ADT's NPI number?

John Chase Callon, ADT's National Provider Identifier (NPI) is 1528639598, issued on Jul 9, 2021. An NPI identifies a provider in billing; it is not a license.

Where is John Chase Callon, ADT located?

The NPPES record lists a practice address at 201 Broadway St Ste 110, Frederick, MD, 21701. Phone: (240) 801-7799. Providers update this record themselves, so call before visiting.

How can I verify John Chase Callon, ADT's license?

NPPES lists Maryland license number ADT2211, as entered by the provider. Search the Maryland board that licenses this profession; the NPPES record confirms identity only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.