Colleen Zanis, D.O.
NPI 1649566357 · Psychiatry Physician · Rockville, MD
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Colleen Zanis, D.O. is a Psychiatry Physician provider in Rockville, MD (NPI 1649566357).
Provider details
- NPI number
- 1649566357
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Female
- Sole proprietor
- No
- License
- OS017489 (PA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
15 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 44 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Clonazepam | 197 | 32 |
| Bupropion Hclbrand: Bupropion Xl | 182 | 59 |
| Duloxetine Hcl | 161 | 50 |
| Quetiapine Fumarate | 137 | 36 |
| Aripiprazole | 119 | 37 |
| Sertraline Hcl | 114 | 38 |
| Olanzapine |
Practice location
Mailing address
Registry dates
- Enumerated
- 2011-06-21
- Last updated
- 2021-06-25
- Certified
- 2021-06-25
Frequently asked questions
- What is Colleen Zanis's NPI number?
- Colleen Zanis's National Provider Identifier (NPI) is 1649566357, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Colleen Zanis's specialty?
- Colleen Zanis is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Colleen Zanis located?
- Colleen Zanis's practice location on file with NPPES is 1396 Piccard Dr, Rockville, MD 20850-4302.
- What is Colleen Zanis's phone number?
- The practice phone number listed in the NPPES registry for Colleen Zanis is (301) 548-5805.
- Does Colleen Zanis accept Medicare?
- Colleen Zanis is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Colleen Zanis's NPI active?
- Yes — Colleen Zanis's NPI (1649566357) is active in the NPPES registry as of the last update on 2021-06-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.