Boseung Halliwell, APN-CNP
NPI 1558676221 · Nurse Practitioner · Evanston, IL
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Boseung Halliwell, APN-CNP is a Nurse Practitioner provider in Evanston, IL (NPI 1558676221).
Provider details
- NPI number
- 1558676221
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- APN-CNP
- Sex
- Female
- Sole proprietor
- No
- License
- 209012602 (IL)
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
15 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
238 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 | 116 | $112 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 61 | $87 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 41 | $79 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 20 | $59 |
Typical Medicare-allowed amounts for these services range $59–$112 (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 · 36 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Clonazepam | 114 | 20 |
| Trazodone Hcl | 86 | 24 |
| Escitalopram Oxalate | 85 | 22 |
| Quetiapine Fumarate | 83 | 19 |
| Sertraline Hcl | 80 | 22 |
| Venlafaxine Hclbrand: Venlafaxine Hcl Er | 70 | 17 |
| Duloxetine Hcl |
Practice location
Mailing address
Registry dates
- Enumerated
- 2010-08-18
- Last updated
- 2021-03-05
- Certified
- 2021-03-05
Frequently asked questions
- What is Boseung Halliwell's NPI number?
- Boseung Halliwell's National Provider Identifier (NPI) is 1558676221, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Boseung Halliwell's specialty?
- Boseung Halliwell is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Boseung Halliwell located?
- Boseung Halliwell's practice location on file with NPPES is 2650 Ridge Ave, Evanston, IL 60201-1700.
- What is Boseung Halliwell's phone number?
- The practice phone number listed in the NPPES registry for Boseung Halliwell is (847) 425-6400.
- Does Boseung Halliwell accept Medicare?
- Boseung Halliwell is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Boseung Halliwell's NPI active?
- Yes — Boseung Halliwell's NPI (1558676221) is active in the NPPES registry as of the last update on 2021-03-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.