NPPES file of Aug 9, 2026

Thomas Sixbey, M.D.

Psychiatry Physician · Annapolis, MD

Thomas Sixbey, M.D. is a psychiatry physician with a practice address in Annapolis, Maryland, and NPI 1205987088, issued on Jan 16, 2007. Check the license (Maryland D0057929, as entered in NPPES) on the Maryland Board of Physicians; 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
1205987088
Name
Thomas Sixbey
Credential
M.D.
Primary taxonomy
Psychiatry Physician 2084P0800X
License number
D0057929 MD
Self-reported in NPPES; status is on the state search
Practice location
1997 Annapolis Exchange Pkwy Ste 300, Annapolis, MD 21401
Phone
(410) 635-1184
Enumerated
Jan 16, 2007
Record last updated
Mar 27, 2026
Fax
(410) 630-8087
Medicare enrollment
Enrolled (PECOS I20040825000653); accepts Medicare assignment
Medical or professional school
University Of Pittsburgh School Of Medicine, 1997
Telehealth
Offers telehealth (CMS)
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 1997 Annapolis Exchange Pkwy Ste 300

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

  1. Victor Bonney, RDCSSonography Specialist/Technologist Cardiovascular1427414861
  2. Susan Goldberg, LCSW-CClinical Social Worker1871265876
  3. Briana HallBehavior Technician1629541768
  4. Emma Parks, LMSWSocial Worker1841040938
  5. Lisa Piechowski, PH.D.Forensic Psychologist1821102690
  6. Emily Weschler, LCSW-CClinical Social Worker1609254903

Verify Thomas Sixbey in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMaryland Board of Physicians
    Search for license D0057929    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 Maryland license search

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71% fewer Medicare Part D claims than the average psychiatry physician in 2024

291 Medicare Part D claims for 40 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D.

  1. Thomas Sixbey291
  2. Specialty average1,000

Most prescribed

  1. Lamotrigine28 claims
  2. Bupropion Xl26 claims
  3. Mirtazapine24 claims
  4. Buspirone Hcl19 claims
  5. Clonazepam19 claims
  6. Zolpidem Tartrate16 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. Arundel Mental Health Professionals LCMillersville, MD

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

Psychiatry Physician providers in Maryland

There are 1,451 psychiatry physician records in Maryland.

All 1,451 in Maryland → Every provider in Annapolis →

Other psychiatry physician records in Maryland

  1. Hina Aamir, M.D.Aberdeen, MD1376777979
  2. Scott Aaronson, M.D.Baltimore, MD1376610790
  3. Archil Abashidze, MDGlen Burnie, MD1891717757
  4. Muhammad Abbas, M.D.Sykesville, MD1801898168
  5. Safiyyah Abdul Rahman, MDBaltimore, MD1669691416
  6. Eapen Abraham, M. D.Perry Point, MD1467415521
  7. Vinod AbrahamHollywood, MD1457438350
  8. Scott AbrahamsonHagerstown, MD1710515465
  9. Somya Abubucker, MDBaltimore, MD1033508361
  10. Elia Acevedo Diaz, M.DGaithersburg, MD1750720553

Common questions

What is Thomas Sixbey, M.D.'s NPI number?

Thomas Sixbey, M.D.'s National Provider Identifier (NPI) is 1205987088, issued on Jan 16, 2007. An NPI identifies a provider in billing; it is not a license.

Where is Thomas Sixbey, M.D. located?

The NPPES record lists a practice address at 1997 Annapolis Exchange Pkwy Ste 300, Annapolis, MD, 21401. Phone: (410) 635-1184. Providers update this record themselves, so call before visiting.

How can I verify Thomas Sixbey, M.D.'s license?

NPPES lists Maryland license number D0057929, as entered by the provider. Search the Maryland Board of Physicians at https://www.mbp.state.md.us/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does Thomas Sixbey, M.D. prescribe under Medicare Part D?

In 2024, Thomas Sixbey, M.D. had 291 Medicare Part D claims for 40 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.

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.