Khelsea O'Brien
NPI 1609423615 · Physician Assistant · Chicago, IL
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Khelsea O'Brien is a Physician Assistant provider in Chicago, IL (NPI 1609423615).
Provider details
- NPI number
- 1609423615
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Sex
- Female
- Sole proprietor
- Yes
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 tenure38% of score
6 yrs in NPPES registry
- Profile completeness38% of score
83% 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 · 6 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Atorvastatin Calcium | 36 |
| Ticagrelorbrand: Brilinta | 28 |
| Clopidogrel Bisulfatebrand: Clopidogrel | 28 |
| Ezetimibe | 14 |
| Metoprolol Succinate | 14 |
| Rilonaceptbrand: Arcalyst | 11 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2019-08-23
- Last updated
- 2020-05-29
- Certified
- 2020-05-29
Frequently asked questions
- What is Khelsea O'Brien's NPI number?
- Khelsea O'Brien's National Provider Identifier (NPI) is 1609423615, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Khelsea O'Brien's specialty?
- Khelsea O'Brien is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Khelsea O'Brien located?
- Khelsea O'Brien's practice location on file with NPPES is 240 E Huron St Ste 1-200, Chicago, IL 60611-2909.
- What is Khelsea O'Brien's phone number?
- The practice phone number listed in the NPPES registry for Khelsea O'Brien is (781) 413-5470.
- Does Khelsea O'Brien accept Medicare?
- Khelsea 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 Khelsea O'Brien's NPI active?
- Yes — Khelsea O'Brien's NPI (1609423615) is active in the NPPES registry as of the last update on 2020-05-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.