Merryjean Losso, M.D.
NPI 1174186027 · Vascular Neurology Physician · Chicago, IL
Enrolled with Medicare as Practitioner - Neurology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Merryjean Losso, M.D. is a Vascular Neurology Physician provider in Chicago, IL (NPI 1174186027).
Provider details
- NPI number
- 1174186027
- Entity type
- Individual
- Primary specialty
- Vascular Neurology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
7 yrs in NPPES registry
- Profile completeness28% of score
83% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
44 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 High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 18 | $187 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 15 | $231 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 11 | $136 |
Typical Medicare-allowed amounts for these services range $136–$231 (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)
- 330 Brookline AveBoston, MA 02215-5400Phone: (617) 667-3210
Registry dates
- Enumerated
- 2019-04-17
- Last updated
- 2025-01-09
- Certified
- 2025-01-09
Frequently asked questions
- What is Merryjean Losso's NPI number?
- Merryjean Losso's National Provider Identifier (NPI) is 1174186027, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Merryjean Losso's specialty?
- Merryjean Losso is listed in the NPPES registry with a primary specialty of Vascular Neurology Physician (Allopathic & Osteopathic Physicians).
- Where is Merryjean Losso located?
- Merryjean Losso's practice location on file with NPPES is 259 E Erie St Ste 1900, Chicago, IL 60611-3246.
- What is Merryjean Losso's phone number?
- The practice phone number listed in the NPPES registry for Merryjean Losso is (312) 695-7950.
- Does Merryjean Losso accept Medicare?
- Merryjean Losso is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Merryjean Losso's NPI active?
- Yes — Merryjean Losso's NPI (1174186027) is active in the NPPES registry as of the last update on 2025-01-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.