Ewere Osian-Dugan, M.D.
NPI 1639494057 · Psychiatry Physician · Baltimore, MD
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ewere Osian-Dugan, M.D. is a Psychiatry Physician provider in Baltimore, MD (NPI 1639494057).
Provider details
- NPI number
- 1639494057
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- D77981 (MD)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
16 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
198 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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 does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 109 | $110 |
| Psychotherapy, 45 Minutes90834 | 89 | $101 |
Typical Medicare-allowed amounts for these services range $101–$110 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 18 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Sertraline Hcl | 64 |
| Buspirone Hcl | 43 |
| Quetiapine Fumarate | 41 |
| Venlafaxine Hclbrand: Venlafaxine Hcl Er | 35 |
| Mirtazapine | 30 |
| Buprenorphine Hcl/Naloxone Hclbrand: Buprenorphine-Naloxone | 27 |
| Haloperidol | 26 |
| Gabapentin | 24 |
| Aripiprazole |
Practice location
Mailing address
Registry dates
- Enumerated
- 2010-03-29
- Last updated
- 2018-09-20
Frequently asked questions
- What is Ewere Osian-Dugan's NPI number?
- Ewere Osian-Dugan's National Provider Identifier (NPI) is 1639494057, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ewere Osian-Dugan's specialty?
- Ewere Osian-Dugan is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Ewere Osian-Dugan located?
- Ewere Osian-Dugan's practice location on file with NPPES is 725 Fallsway, Baltimore, MD 21202-4147.
- What is Ewere Osian-Dugan's phone number?
- The practice phone number listed in the NPPES registry for Ewere Osian-Dugan is (667) 600-3429.
- Does Ewere Osian-Dugan accept Medicare?
- Ewere Osian-Dugan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ewere Osian-Dugan's NPI active?
- Yes — Ewere Osian-Dugan's NPI (1639494057) is active in the NPPES registry as of the last update on 2018-09-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.