Hoyi Tsui, PHARMD
Pharmacist · Bethesda, MD
Hoyi Tsui, PHARMD is a pharmacist with a practice address in Bethesda, Maryland, and NPI 1922712298, issued on Jan 10, 2023. Check the license (Maryland 29001, as entered in NPPES) with the Maryland board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Hoyi Tsui
- Credential
- PHARMD
- Primary taxonomy
- Pharmacist 183500000X
- License number
- 29001 MD
Self-reported in NPPES; status is on the state search - Practice location
- 4805 Battery LN, Bethesda, MD 20814
- Phone
- (240) 802-2952
- Enumerated
- Jan 10, 2023
- Record last updated
- Jun 18, 2026
- Fax
- (240) 630-8644
- Entity
- Type 1 · individual
8 nearest pharmacist records → All 5,562 in Maryland → Look up another NPI →
Also registered at 4805 Battery LN
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Hoyi Tsui in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Maryland board licenses this profession
Search for license 29001Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Most of these Medicare Part D claims are vaccines, 100% of the cost of the top drugs
33 Medicare Part D claims for 28 beneficiaries, against an average of 119 among the 28,524 providers of this specialty who prescribed in Part D. Brand-name drugs were 100% of claims.
Most prescribed
Pharmacies often give vaccines under a standing order that names one clinician, and CMS counts every such claim under that clinician's NPI. These claims are therefore not a measure of this clinician's own prescribing.
- Abrysvo17 claims
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.
Hoyi Tsui among 5,562 pharmacist records in Maryland
Hoyi Tsui, PHARMD is one of 5,562 pharmacist records with a practice address in Maryland. 10% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2023, is newer than 89% of them.
- NPI issued2023 · 89% of these records are older, 8% newer
- In a Medicare fileYes · 10% of these records are
- In the CMS Doctors and Clinicians fileNo · under 1% of these records are
- Record last updated2026 · 78% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 183500000X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
243 pharmacist records list a practice address in Bethesda
They are 243 of the 7,245 NPPES records with a practice address in Bethesda, and 5,562 pharmacist records in Maryland.
All 5,562 in Maryland → Every provider in Bethesda → Pharmacist nationwide →
The 8 pharmacist records with the nearest ZIP codes
- Janet Anderson, PHARM. D.Bowie, MD 208141639299530
- Patrick Baker, PHARM.DBethesda, MD 208141982014734
- Eric Butcher, PHARMD.Bethesda, MD 208141013270529
- Gregory Constable, PHARMDBethesda, MD 208141497016703
- Stephanie Donahoe, RPH, MPHBethesda, MD 208141275801250
- Stephen Friedman, P.D.Bethesda, MD 208141720381114
- Richard HoBethesda, MD 208141922308337
- Shelly Lee, PHARM.D.Bethesda, MD 208141780984278
Common questions
What is Hoyi Tsui, PHARMD's NPI number?
Hoyi Tsui, PHARMD's National Provider Identifier (NPI) is 1922712298, issued on Jan 10, 2023. An NPI identifies a provider in billing; it is not a license.
Where is Hoyi Tsui, PHARMD located?
The NPPES record lists a practice address at 4805 Battery LN, Bethesda, MD, 20814. Phone: (240) 802-2952. Providers update this record themselves, so call before visiting.
How can I verify Hoyi Tsui, PHARMD's license?
NPPES lists Maryland license number 29001, as entered by the provider. Search the Maryland board that licenses this profession; the NPPES record confirms identity only.
How much does Hoyi Tsui, PHARMD prescribe under Medicare Part D?
In 2024, Hoyi Tsui, PHARMD had 33 Medicare Part D claims for 28 beneficiaries; the average among pharmacist prescribers was 119. 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.