NPPES file of Aug 9, 2026

Mason Andrew Bentley Stillman

Psychiatry Physician · Berlin, VT

Mason Andrew Bentley Stillman is a psychiatry physician with a practice address in Berlin, Vermont, and NPI 1346827078, issued on Mar 27, 2021. Check the license (Vermont 042.0017159, as entered in NPPES) on the Vermont Board of Medical Practice; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1346827078
Name
Mason Andrew Bentley Stillman
Primary taxonomy
Psychiatry Physician 2084P0800X
License numbers
042.0017159 VT
R3753 NH
Self-reported in NPPES; status is on the state search
Practice location
130 Fisher RD, Berlin, VT 05602
Phone
(802) 371-4100
Enumerated
Mar 27, 2021
Record last updated
Sep 1, 2023
Medicare enrollment
Enrolled (PECOS I20250820001974); accepts Medicare assignment
Medical or professional school
University Of Washington School Of Medicine, 2021
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.
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Also registered at 130 Fisher RD

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

  1. Kenneth Adler, MDPsychiatry Physician1417976887
  2. Aimee Ahari, PA-CPhysician Assistant1639448418
  3. Maria Aveni, M.D.Anesthesiology Physician1205858495
  4. Martin Bak, MDInternal Medicine Physician1629093554
  5. Kay BarrettClinical Psychologist1285759530
  6. Christian Bean, M.D.Orthopaedic Surgery Physician1831155324

Verify Mason Andrew Bentley Stillman in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersVermont Board of Medical Practice
    Search for license 042.0017159
    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 Vermont 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.

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32% fewer Medicare Part D claims than the average psychiatry physician in 2024

682 Medicare Part D claims for 48 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 6% of claims.

  1. Mason Stillman682
  2. Specialty average1,000

Most prescribed

  1. Bupropion Xl57 claims
  2. Clozapine42 claims
  3. Sertraline Hcl33 claims
  4. Trazodone Hcl33 claims
  5. Duloxetine Hcl31 claims
  6. Risperidone31 claims

Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.

Bills Medicare through one group practice

  1. Campbell County Hospital DistrictGillette, WY

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Mason Andrew Bentley Stillman among 203 psychiatry physician records in Vermont

Mason Andrew Bentley Stillman is one of 203 psychiatry physician records with a practice address in Vermont. 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 2021, is newer than 97% of them.

  • NPI issued2021 · 97% of these records are older, 2% newer
  • In a Medicare fileYes · 62% of these records are
  • In the CMS Doctors and Clinicians fileYes · 48% of these records are
  • Graduated2021 · median 2005 among the 97 with a school on file
  • Record last updated2023 · 64% 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 Vermont practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

15 psychiatry physician records list a practice address in Berlin

They are 15 of the 340 NPPES records with a practice address in Berlin, and 203 psychiatry physician records in Vermont.

The 8 psychiatry physician records with the nearest ZIP codes

  1. Kenneth Adler, MDBerlin, VT 056021417976887
  2. Harlow Ballard, MDMontpelier, VT 056021154416774
  3. Margaret Bolton, M.D.Montpelier, VT 056021063438000
  4. Paul Cameron, MDBerlin, VT 056021760403513
  5. Stuart Graves, MDMontpelier, VT 056021821005786
  6. Alicia Groft, M.D.Berlin, VT 056021598874570
  7. Ryosuke Kawatsuji, M.D.Berlin, VT 056021134215940
  8. Justin Knapp, M.D.Berlin, VT 056021336242528

Common questions

What is Mason Andrew Bentley Stillman's NPI number?

Mason Andrew Bentley Stillman's National Provider Identifier (NPI) is 1346827078, issued on Mar 27, 2021. An NPI identifies a provider in billing; it is not a license.

Where is Mason Andrew Bentley Stillman located?

The NPPES record lists a practice address at 130 Fisher RD, Berlin, VT, 05602. Phone: (802) 371-4100. Providers update this record themselves, so call before visiting.

How can I verify Mason Andrew Bentley Stillman's license?

NPPES lists Vermont license number 042.0017159, as entered by the provider. Search the Vermont Board of Medical Practice at https://www.healthvermont.gov/systems/board-medical-practice. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does Mason Andrew Bentley Stillman prescribe under Medicare Part D?

In 2024, Mason Andrew Bentley Stillman had 682 Medicare Part D claims for 48 beneficiaries; the average among psychiatry physician prescribers was 1,000. Part D covers Medicare prescriptions 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. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

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.