Michael A. Grossnickle, RPH
Pharmacist · Portland, OR
Michael A. Grossnickle, RPH is a pharmacist with a practice address in Portland, Oregon, and NPI 1861940769, issued on Sep 20, 2016. Check the license (Oregon RPH-0015591, as entered in NPPES) with the Oregon board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Michael A. Grossnickle
- Credential
- RPH
- Primary taxonomy
- Pharmacist 183500000X
- License number
- RPH-0015591 OR
Self-reported in NPPES; status is on the state search - Practice location
- 5420 NE 33RD Ave, Portland, OR 97211
- Phone
- (971) 230-0153
- Enumerated
- Sep 20, 2016
- Record last updated
- Jul 8, 2022
- Medicaid ID
- 500750146 OR
- Entity
- Type 1 · individual
8 nearest pharmacist records → All 3,571 in Oregon → Look up another NPI →
Also registered at 5420 NE 33RD Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- My Nguyen, PHARMDPharmacist1346784766
- Wan-Wen YehPharmacist1174838742
Verify Michael A. Grossnickle in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Oregon board licenses this profession
Search for license RPH-0015591Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
85% fewer Medicare Part D claims than the average pharmacist in 2024
18 Medicare Part D claims for 18 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.
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.
Michael A. Grossnickle among 3,571 pharmacist records in Oregon
Michael A. Grossnickle, RPH is one of 3,571 pharmacist records with a practice address in Oregon. 28% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 60% of them.
- NPI issued2016 · 60% of these records are older, 35% newer
- In a Medicare fileYes · 28% of these records are
- In the CMS Doctors and Clinicians fileNo · under 1% of these records are
- Record last updated2022 · 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 Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
931 pharmacist records list a practice address in Portland
They are 931 of the 42,088 NPPES records with a practice address in Portland, and 3,571 pharmacist records in Oregon.
All 3,571 in Oregon → Every provider in Portland → Pharmacist nationwide →
The 8 pharmacist records with the nearest ZIP codes
- Geta Anteneh, PHARM DPortland, OR 972111538475884
- Laura ElversPortland, OR 972111063746337
- Kenneth Hatch, RPHPortland, OR 972111336428028
- Kevin HillegassPortland, OR 972111861725723
- Brigitte JonesPortland, OR 972111861869521
- Kate KhinePortland, OR 972111801113477
- Jennifer KimPortland, OR 972111215160536
- Phuc La, PHARMDPortland, OR 972111932354990
Common questions
What is Michael A. Grossnickle, RPH's NPI number?
Michael A. Grossnickle, RPH's National Provider Identifier (NPI) is 1861940769, issued on Sep 20, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Michael A. Grossnickle, RPH located?
The NPPES record lists a practice address at 5420 NE 33RD Ave, Portland, OR, 97211. Phone: (971) 230-0153. Providers update this record themselves, so call before visiting.
How can I verify Michael A. Grossnickle, RPH's license?
NPPES lists Oregon license number RPH-0015591, as entered by the provider. Search the Oregon board that licenses this profession; the NPPES record confirms identity only.
How much does Michael A. Grossnickle, RPH prescribe under Medicare Part D?
In 2024, Michael A. Grossnickle, RPH had 18 Medicare Part D claims for 18 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.