Colleen M. Zanis, D.O.
Psychiatry Physician · Rockville, MD
Colleen M. Zanis, D.O. is a psychiatry physician with a practice address in Rockville, Maryland, and NPI 1649566357, issued on Jun 21, 2011. Check the license on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Colleen M. Zanis
- Credential
- D.O.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- OS017489 PA
Self-reported in NPPES; status is on the state search - Practice location
- 1396 Piccard Dr, Rockville, MD 20850
- Phone
- (301) 548-5805
- Enumerated
- Jun 21, 2011
- Record last updated
- Jun 25, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20170311000064); accepts Medicare assignment
- Medical or professional school
- Philadelphia College Of Osteopathic Medicine, 2011
- Entity
- Type 1 · individual
Also registered at 1396 Piccard Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Karla Abney, LGSW, LMSWClinical Social Worker1215012745
- Deborah Ahern, LCSW-CClinical Social Worker1255634622
- Anita Bansal, MDPsychiatry Physician1285075853
- Elizabeth Bashir, PHARMDPharmacist1891230223
- Betelhem BelainehMammography Radiologic Technologist1003447202
- Angela Bien, M.D.Gastroenterology Physician1700049491
Verify Colleen M. Zanis in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of PhysiciansCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.8 times the Medicare Part D claims of the average psychiatry physician in 2024
2,830 Medicare Part D claims for 384 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 5% of claims.
Most prescribed
- Clonazepam197 claims
- Bupropion Xl182 claims
- Duloxetine Hcl161 claims
- Quetiapine Fumarate137 claims
- Aripiprazole119 claims
- Sertraline Hcl114 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
- Kaiser Foundation Health Plan OF The Mid Atlantic States, IncWashington, DC
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
80 psychiatry physician records list a practice address in Rockville
They are 80 of the 14,353 NPPES records with a practice address in Rockville, and 1,451 psychiatry physician records in Maryland.
All 80 in Rockville → All 1,451 in Maryland → Every provider in Rockville →
Other psychiatry physician records in Maryland
- Hina Aamir, M.D.Aberdeen, MD1376777979
- Scott Aaronson, M.D.Baltimore, MD1376610790
- Archil Abashidze, MDGlen Burnie, MD1891717757
- Muhammad Abbas, M.D.Sykesville, MD1801898168
- Safiyyah Abdul Rahman, MDBaltimore, MD1669691416
- Eapen Abraham, M. D.Perry Point, MD1467415521
- Vinod AbrahamHollywood, MD1457438350
- Scott AbrahamsonHagerstown, MD1710515465
- Somya Abubucker, MDBaltimore, MD1033508361
- Elia Acevedo Diaz, M.DGaithersburg, MD1750720553
Common questions
What is Colleen M. Zanis, D.O.'s NPI number?
Colleen M. Zanis, D.O.'s National Provider Identifier (NPI) is 1649566357, issued on Jun 21, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Colleen M. Zanis, D.O. located?
The NPPES record lists a practice address at 1396 Piccard Dr, Rockville, MD, 20850. Phone: (301) 548-5805. Providers update this record themselves, so call before visiting.
How can I verify Colleen M. Zanis, D.O.'s license?
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 Colleen M. Zanis, D.O. prescribe under Medicare Part D?
In 2024, Colleen M. Zanis, D.O. had 2,830 Medicare Part D claims for 384 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.