Kellyann O'Brien, PA-C
NPI 1619910155 · Medical Physician Assistant · Springfield, MA
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Kellyann O'Brien, PA-C is a Medical Physician Assistant provider in Springfield, MA (NPI 1619910155).
Provider details
- NPI number
- 1619910155
- Entity type
- Individual
- Primary specialty
- Medical Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA-C
- Sex
- Female
- Sole proprietor
- No
- License
- PA4823 (MA)
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
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
32 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) |
|---|---|---|
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 17 | $96 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 15 | $143 |
Typical Medicare-allowed amounts for these services range $96–$143 (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
Additional practice locations (1)
- 471 Center StLudlow, MA 01056-2733Phone: (413) 625-3500
Registry dates
- Enumerated
- 2006-06-13
- Last updated
- 2023-11-17
- Certified
- 2023-11-17
Frequently asked questions
- What is Kellyann O'Brien's NPI number?
- Kellyann O'Brien's National Provider Identifier (NPI) is 1619910155, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Kellyann O'Brien's specialty?
- Kellyann O'Brien is listed in the NPPES registry with a primary specialty of Medical Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Kellyann O'Brien located?
- Kellyann O'Brien's practice location on file with NPPES is 3400 Main St, Springfield, MA 01107-1113.
- What is Kellyann O'Brien's phone number?
- The practice phone number listed in the NPPES registry for Kellyann O'Brien is (413) 794-9560.
- Does Kellyann O'Brien accept Medicare?
- Kellyann 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 Kellyann O'Brien's NPI active?
- Yes — Kellyann O'Brien's NPI (1619910155) is active in the NPPES registry as of the last update on 2023-11-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.