Mark Olson, RPH
Pharmacist · Sebastopol, CA
Mark Olson, RPH is a pharmacist with a practice address in Sebastopol, California, and NPI 1831224468, issued on Feb 23, 2007. Check the license with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Mark Olson
- Credential
- RPH
- Primary taxonomy
- Pharmacist 183500000X
- Practice location
- 218 N Main St, Sebastopol, CA 95472
- Phone
- (707) 829-3007
- Enumerated
- Feb 23, 2007
- Entity
- Type 1 · individual
Also registered at 218 N Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Marny GuangcoPharmacist1982932943
- Barbara Jason, PHARMACY TECHNICIANPharmacy Technician1245933456
- Bumsoo KimPharmacist1518477801
- Eunhye KwonPharmacist1023486669
- Areen SawagedPharmacist1922702836
Verify Mark Olson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California 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
69% fewer Medicare Part D claims than the average pharmacist in 2024
40 Medicare Part D claims for 32 beneficiaries, against an average of 127 among the 28,933 providers of this specialty who prescribed in Part D. Brand-name drugs were 100% of claims.
Most prescribed
- Shingrix19 claims
- Abrysvo16 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.
18 pharmacist records list a Sebastopol practice address
They are 18 of the 550 NPPES records with a Sebastopol practice address, and 32,698 pharmacist records in California.
All 18 in Sebastopol → All 32,698 in California → Every provider in Sebastopol →
Other pharmacist records in California
- Caroline A-Haja, PHARM.D.San Pedro, CA1851664361
- Gayatri AachiLivermore, CA1235660754
- Adrian Karlos Aala, PHARMD, RPHHayward, CA1023955499
- Mahshid Aalam, PHARMDLos Angeles, CA1659086155
- Jaleh AaliiveliSan Ramon, CA1336629963
- Cassi Aarvig, RPHTracy, CA1023679941
- Meara Michi AbadOrange, CA1750181178
- Nader Abadier, RPHFontana, CA1326255647
- Samia Abadier, RPHFontana, CA1548742836
- Sandy Abadir, RPHChino Hills, CA1811644412
Common questions
What is Mark Olson, RPH's NPI number?
Mark Olson, RPH's National Provider Identifier (NPI) is 1831224468, issued on Feb 23, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Mark Olson, RPH located?
The NPPES record lists a practice address at 218 N Main St, Sebastopol, CA, 95472. Phone: (707) 829-3007. Providers update this record themselves, so call before visiting.
How can I verify Mark Olson, RPH's license?
Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Mark Olson, RPH prescribe under Medicare Part D?
In 2024, Mark Olson, RPH had 40 Medicare Part D claims for 32 beneficiaries; the average among pharmacist prescribers was 127. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.