John Hyun, PHARM. D.
NPI 1265506943 · Pharmacotherapy Pharmacist · Riverside, CA
John Hyun, PHARM. D. is a Pharmacotherapy Pharmacist provider in Riverside, CA (NPI 1265506943).
Provider details
- NPI number
- 1265506943
- Entity type
- Individual
- Primary specialty
- Pharmacotherapy PharmacistPharmacy Service Providers
- Credential
- PHARM. D.
- Sex
- Male
- Sole proprietor
- No
- License
- 41888 (CA)
Specialties & taxonomies
Pharmacy Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% 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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 5 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Epoetin Alfabrand: Procrit | 382 | 128 |
| Syringe and Needle,insulin,1mlbrand: Veo Insulin Syringe | 183 | 135 |
| Alcohol Antiseptic Padsbrand: Alcohol Prep Pads | 16 | 15 |
| Alcohol Antiseptic Padsbrand: Alcohol Swab | 12 | — |
| Alcohol Antiseptic Padsbrand: Single Use Swab | 11 | 11 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-17
- Last updated
- 2007-07-08
Frequently asked questions
- What is John Hyun's NPI number?
- John Hyun's National Provider Identifier (NPI) is 1265506943, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Hyun's specialty?
- John Hyun is listed in the NPPES registry with a primary specialty of Pharmacotherapy Pharmacist (Pharmacy Service Providers).
- Where is John Hyun located?
- John Hyun's practice location on file with NPPES is 10800 Magnolia Ave, Riverside, CA 92505-3043.
- What is John Hyun's phone number?
- The practice phone number listed in the NPPES registry for John Hyun is (951) 353-4059.
- Is John Hyun's NPI active?
- Yes — John Hyun's NPI (1265506943) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.