NPPES file of Aug 9, 2026

Mariela Herrera Rojas, M.D.

Psychiatry Physician · Billings, MT

Mariela Herrera Rojas, M.D. is a psychiatry physician with a practice address in Billings, Montana, and NPI 1922318096, issued on Oct 7, 2010. Check the license (Montana MED-PHYS-LIC-33952, as entered in NPPES) on the Montana Board of Medical Examiners; the Medicare figures below come from public CMS files.

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

NPPES recordNPPES file of Aug 9, 2026
1922318096
Name
Mariela Herrera Rojas
Credential
M.D.
Primary taxonomy
Psychiatry Physician 2084P0800X
License numbers
MED-PHYS-LIC-33952 MT
57.017664 OH
Self-reported in NPPES; status is on the state search
Practice location
1020 N 27TH St, Billings, MT 59101
Phone
(406) 238-2500
Enumerated
Oct 7, 2010
Record last updated
Feb 23, 2022
Medicare enrollment
Enrolled (PECOS I20150722005508); accepts Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
Download card Updates feed

8 nearest psychiatry physician records → All 156 in Montana → Look up another NPI →

Also registered at 1020 N 27TH St

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

  1. Hewes Agnew, MDThoracic Surgery (Cardiothoracic Vascular Surgery) Physician1285703330
  2. John Andre, PHDClinical Psychologist1114036126
  3. Eric Arzubi, M.D.Psychiatry Physician1770738353
  4. Annette Beaudry, LCSW, CMH7Clinical Social Worker1740629195
  5. John Blodgett, MDPsychiatry Physician1679642896
  6. Fernando Boschini, MDCardiovascular Disease Physician1891714770

Verify Mariela Herrera Rojas in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMontana Board of Medical Examiners
    Search for license MED-PHYS-LIC-33952    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
Open the Montana license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

Is this page about you? You can ask us to correct, restrict or remove it: how.

One hospital affiliation

  1. Billings ClinicBillings, MT · Acute Care Hospitals4 of 5 stars

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.

Mariela Herrera Rojas among 156 psychiatry physician records in Montana

Mariela Herrera Rojas, M.D. is one of 156 psychiatry physician records with a practice address in Montana. 62% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 66% of them.

  • NPI issued2010 · 66% of these records are older, 30% newer
  • In a Medicare fileYes · 62% of these records are
  • In the CMS Doctors and Clinicians fileYes · 51% of these records are
  • Graduated2002 · median 2005 among the 80 with a school on file
  • Record last updated2022 · 51% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a Montana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

41 psychiatry physician records list a practice address in Billings

They are 41 of the 4,035 NPPES records with a practice address in Billings, and 156 psychiatry physician records in Montana.

All 156 in Montana → Every provider in Billings → Psychiatry Physician nationwide →

The 8 psychiatry physician records with the nearest ZIP codes

  1. John Blodgett, MDBillings, MT 591011679642896
  2. John Denegre, MDBillings, MT 591011134230972
  3. Eeva Echeverri, MDBillings, MT 591011255414447
  4. Erik Goodwyn, M.D.Billings, MT 591011356422380
  5. Belinda Hartley, MDBillings, MT 591011689612228
  6. Faraz Masood, MDBillings, MT 591011215041744
  7. Robert McDermott, MDBillings, MT 591011861592438
  8. Mark Nicholson, MDBillings, MT 591011235126566

Common questions

What is Mariela Herrera Rojas, M.D.'s NPI number?

Mariela Herrera Rojas, M.D.'s National Provider Identifier (NPI) is 1922318096, issued on Oct 7, 2010. An NPI identifies a provider in billing; it is not a license.

Where is Mariela Herrera Rojas, M.D. located?

The NPPES record lists a practice address at 1020 N 27TH St, Billings, MT, 59101. Phone: (406) 238-2500. Providers update this record themselves, so call before visiting.

How can I verify Mariela Herrera Rojas, M.D.'s license?

NPPES lists Montana license number MED-PHYS-LIC-33952, as entered by the provider. Search the Montana Board of Medical Examiners at https://ebiz.mt.gov/POL/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. 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.