NPPES file of Aug 9, 2026

Mark Charles Olivieri

Addiction (Substance Use Disorder) Counselor · Miles City, MT

Mark Charles Olivieri is an addiction (substance use disorder) counselor with a practice address in Miles City, Montana, and NPI 1306735519, issued on Jul 1, 2025. Check the license (Montana BBH-LAC-LIC-14095, as entered in NPPES) with the Montana 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
1306735519
Name
Mark Charles Olivieri
Primary taxonomy
Addiction (Substance Use Disorder) Counselor 101YA0400X
License number
BBH-LAC-LIC-14095 MT
Self-reported in NPPES; status is on the state search
Practice location
4 N Haynes Ave, Miles City, MT 59301
Phone
(406) 941-0544
Enumerated
Jul 1, 2025
Record last updated
Jul 1, 2025
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 691 in Montana → Look up another NPI →

Also registered at 4 N Haynes Ave

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

  1. Robin Holthus, LCSW, ACLCClinical Social Worker1447149679
  2. Abigail RymanCounselor1033008909
  3. Valerie Smith, LCSW, LACClinical Social Worker1073304606
  4. Landon Woods, LCPCMental Health Counselor1053293894

Verify Mark Charles Olivieri in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Montana board licenses this profession
    Search for license BBH-LAC-LIC-14095    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 Montana license search

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Mark Charles Olivieri among 691 addiction (substance use disorder) counselor records in Montana

Mark Charles Olivieri is one of 691 addiction (substance use disorder) counselor records with a practice address in Montana. 1% 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 2025, is newer than 86% of them.

  • NPI issued2025 · 86% of these records are older, 6% newer
  • In a Medicare fileNo · 1% of these records are
  • In the CMS Doctors and Clinicians fileNo · 3% of these records are
  • Record last updated2025 · 49% 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 Montana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

15 addiction (substance use disorder) counselor records list a practice address in Miles City

They are 15 of the 240 NPPES records with a practice address in Miles City, and 691 addiction (substance use disorder) counselor records in Montana. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 691 in Montana → Every provider in Miles City → Addiction (Substance Use Disorder) Counselor nationwide →

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

  1. Brady Brooks, LACGlasgow, MT 593011447936216
  2. Desiree Call, ACLCMiles City, MT 593011124836853
  3. Amanda DusatkoMiles City, MT 593011174284384
  4. Lindsey HenryMiles City, MT 593011780415174
  5. Anita Leinen, LACMiles City, MT 593011528208832
  6. Pamela Ley, LACMiles City, MT 593011497989917
  7. John Rex, LACMiles City, MT 593011366577934
  8. Steven Rowley, LACMiles City, MT 593011962826453

Common questions

What is Mark Charles Olivieri's NPI number?

Mark Charles Olivieri's National Provider Identifier (NPI) is 1306735519, issued on Jul 1, 2025. An NPI identifies a provider in billing; it is not a license.

Where is Mark Charles Olivieri located?

The NPPES record lists a practice address at 4 N Haynes Ave, Miles City, MT, 59301. Phone: (406) 941-0544. Providers update this record themselves, so call before visiting.

How can I verify Mark Charles Olivieri's license?

NPPES lists Montana license number BBH-LAC-LIC-14095, as entered by the provider. Search the Montana 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.