Hilary Anne Hayssen, MD
Student in an Organized Health Care Education/Training Program · Baltimore, MD
Hilary Anne Hayssen, MD is a student in an organized health care education/training program with a practice address in Baltimore, Maryland, and NPI 1659830644, issued on Mar 18, 2019. Check the license with the Maryland board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Hilary Anne Hayssen
- Credential
- MD
- Primary taxonomy
- Student in an Organized Health Care Education/Training Program 390200000X
- Practice location
- 22 S Greene St # S8B12, Baltimore, MD 21201
- Phone
- (410) 328-6713
- Enumerated
- Mar 18, 2019
- Record last updated
- Mar 18, 2019 (not updated in 7 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest student in an organized health care education/training program records → All 5,632 in Maryland → Look up another NPI →
Also registered at 22 S Greene St # S8B12
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Hilary Anne Hayssen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Maryland board licenses this professionCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
91% fewer Medicare Part D claims than the average student in an organized health care education/training program in 2024
16 Medicare Part D claims for 14 beneficiaries, against an average of 185 among the 59,748 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims. 12 claims were for opioids.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Hilary Anne Hayssen among 5,632 student in an organized health care education/training program records in Maryland
Hilary Anne Hayssen, MD is one of 5,632 student in an organized health care education/training program records with a practice address in Maryland. 26% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 16% of them.
- NPI issued2019 · 16% of these records are older, 80% newer
- In a Medicare fileYes · 26% of these records are
- In the CMS Doctors and Clinicians fileNo · 2% of these records are
- Record last updated2019 · 24% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 390200000X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
4,028 student in an organized health care education/training program records list a practice address in Baltimore
They are 4,028 of the 35,183 NPPES records with a practice address in Baltimore, and 5,632 student in an organized health care education/training program records in Maryland.
All 5,632 in Maryland → Every provider in Baltimore → Student in an Organized Health Care Education/Training Program nationwide →
The 8 student in an organized health care education/training program records with the nearest ZIP codes
- Eid Almutairy, MDBaltimore, MD 212011336274950
- Danielle Brown, MDBaltimore, MD 212011023152402
- Philip Cherian, M.D.Baltimore, MD 212011528194354
- Ari Dorros, MDBaltimore, MD 212011588791701
- Sara Handy, MDBaltimore, MD 212011578699773
- Elisabeth Kato, MDBaltimore, MD 212011790829125
- Daniel King, MDBaltimore, MD 212011396871588
- Myrna Marron, MDBaltimore, MD 212011528196839
Common questions
What is Hilary Anne Hayssen, MD's NPI number?
Hilary Anne Hayssen, MD's National Provider Identifier (NPI) is 1659830644, issued on Mar 18, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Hilary Anne Hayssen, MD located?
The NPPES record lists a practice address at 22 S Greene St # S8B12, Baltimore, MD, 21201. Phone: (410) 328-6713. Providers update this record themselves, so call before visiting.
How can I verify Hilary Anne Hayssen, MD's license?
Search the Maryland board that licenses this profession; the NPPES record confirms identity only.
How much does Hilary Anne Hayssen, MD prescribe under Medicare Part D?
In 2024, Hilary Anne Hayssen, MD had 16 Medicare Part D claims for 14 beneficiaries; the average among student in an organized health care education/training program prescribers was 185. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.