Hilary Hayssen, MD
NPI 1659830644 · Student in an Organized Health Care Education/Training Program · Baltimore, MD
Enrolled with Medicare as Order and Referring Only - General Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Hilary Hayssen, MD is a Student in an Organized Health Care Education/Training Program provider in Baltimore, MD (NPI 1659830644).
Provider details
- NPI number
- 1659830644
- Entity type
- Individual
- Primary specialty
- Student in an Organized Health Care Education/Training ProgramStudent, Health Care
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
Specialties & taxonomies
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
7 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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2019-03-18
- Last updated
- 2019-03-18
Frequently asked questions
- What is Hilary Hayssen's NPI number?
- Hilary Hayssen's National Provider Identifier (NPI) is 1659830644, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Hilary Hayssen's specialty?
- Hilary Hayssen is listed in the NPPES registry with a primary specialty of Student in an Organized Health Care Education/Training Program (Student, Health Care).
- Where is Hilary Hayssen located?
- Hilary Hayssen's practice location on file with NPPES is 22 S Greene St # S8b12, Baltimore, MD 21201-1590.
- What is Hilary Hayssen's phone number?
- The practice phone number listed in the NPPES registry for Hilary Hayssen is (410) 328-6713.
- Does Hilary Hayssen accept Medicare?
- Hilary Hayssen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Hilary Hayssen's NPI active?
- Yes — Hilary Hayssen's NPI (1659830644) is active in the NPPES registry as of the last update on 2019-03-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.