Steven Malzahn, PHARMD
Pharmacist · Rancho Santa Margarita, CA
Steven Malzahn, PHARMD is a pharmacist with a practice address in Rancho Santa Margarita, California, and NPI 1528387586, issued on May 28, 2010. Check the license (California 51871, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Steven Malzahn
- Credential
- PHARMD
- Primary taxonomy
- Pharmacist 183500000X
- License number
- 51871 CA
Self-reported in NPPES; status is on the state search - Practice location
- 31541 Santa Margarita Pkwy, Rancho Santa Margarita, CA 92688
- Phone
- (949) 858-7737
- Enumerated
- May 28, 2010
- Record last updated
- May 28, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (949) 858-9057
- Entity
- Type 1 · individual
8 nearest pharmacist records → All 32,533 in California → Look up another NPI →
Also registered at 31541 Santa Margarita Pkwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Evelyn HerreraPharmacy Technician1669130043
- George IbrahimPharmacist1477887545
- Shahla ManafianPharmacist1174843668
Verify Steven Malzahn in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 51871Check 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, 94% of the cost of the top drugs
169 Medicare Part D claims for 159 beneficiaries, against an average of 119 among the 28,524 providers of this specialty who prescribed in Part D. Brand-name drugs were over 99% 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.
- Arexvy54 claims
- Shingrix44 claims
- Abrysvo35 claims
- Boostrix Tdap34 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.
Steven Malzahn among 32,533 pharmacist records in California
Steven Malzahn, PHARMD is one of 32,533 pharmacist records with a practice address in California. 15% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 12% of them.
- NPI issued2010 · 12% of these records are older, 82% newer
- In a Medicare fileYes · 15% of these records are
- In the CMS Doctors and Clinicians fileNo · under 1% of these records are
- Record last updated2010 · 76% 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 California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
31 pharmacist records list a practice address in Rancho Santa Margarita
They are 31 of the 479 NPPES records with a practice address in Rancho Santa Margarita, and 32,533 pharmacist records in California.
All 32,533 in California → Every provider in Rancho Santa Margarita → Pharmacist nationwide →
The 8 pharmacist records with the nearest ZIP codes
- Lisa Garner, R.PHRancho Santa Margarita, CA 926881477718120
- George IbrahimRancho Santa Margarita, CA 926881477887545
- Monique Johnson, PHARM.D.Rancho Santa Margarita, CA 926881568641637
- Dina Liswi, PHARMDRancho Santa Margarita, CA 926881063708329
- Shahla ManafianRancho Santa Margarita, CA 926881174843668
- Catherine Ngo, PHARMDRsm, CA 926881922385293
- Bryan Nguyen, PHARM.D.Rancho Santa Margarita, CA 926881396013710
- Trinhity Nguyen, PHARM.D.Rancho Santa Margarita, CA 926881730598756
Common questions
What is Steven Malzahn, PHARMD's NPI number?
Steven Malzahn, PHARMD's National Provider Identifier (NPI) is 1528387586, issued on May 28, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Steven Malzahn, PHARMD located?
The NPPES record lists a practice address at 31541 Santa Margarita Pkwy, Rancho Santa Margarita, CA, 92688. Phone: (949) 858-7737. Providers update this record themselves, so call before visiting.
How can I verify Steven Malzahn, PHARMD's license?
NPPES lists California license number 51871, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Steven Malzahn, PHARMD prescribe under Medicare Part D?
In 2024, Steven Malzahn, PHARMD had 169 Medicare Part D claims for 159 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.