Danielle O'Brien, PA-C
NPI 1366040362 · Physician Assistant · Baltimore, MD
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Danielle O'Brien, PA-C is a Physician Assistant provider in Baltimore, MD (NPI 1366040362).
Provider details
- NPI number
- 1366040362
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA-C
- Sex
- Female
- Sole proprietor
- Yes
- License
- C0007732 (MD)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
5 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
84 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) |
|---|---|---|
| Emergency Department Visit With High Level of Medical Decision Making99285 | 61 | $161 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 23 | $111 |
Typical Medicare-allowed amounts for these services range $111–$161 (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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2020-10-12
- Last updated
- 2023-04-11
- Certified
- 2023-04-11
Frequently asked questions
- What is Danielle O'Brien's NPI number?
- Danielle O'Brien's National Provider Identifier (NPI) is 1366040362, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Danielle O'Brien's specialty?
- Danielle O'Brien is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Danielle O'Brien located?
- Danielle O'Brien's practice location on file with NPPES is 9000 Franklin Square Dr, Baltimore, MD 21237-3901.
- What is Danielle O'Brien's phone number?
- The practice phone number listed in the NPPES registry for Danielle O'Brien is (443) 777-9000.
- Does Danielle O'Brien accept Medicare?
- Danielle O'Brien is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Danielle O'Brien's NPI active?
- Yes — Danielle O'Brien's NPI (1366040362) is active in the NPPES registry as of the last update on 2023-04-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.