Karen C. Chang, RPH
Pharmacist · Cotati, CA
Karen C. Chang, RPH is a pharmacist with a practice address in Cotati, California, and NPI 1043436280, issued on Apr 17, 2007. Check the license (California RPH59478, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Karen C. Chang
- Credential
- RPH
- Primary taxonomy
- Pharmacist 183500000X
- License number
- RPH59478 CA
Self-reported in NPPES; status is on the state search - Practice location
- 31 George St, Cotati, CA 94931
- Phone
- (707) 792-2010
- Enumerated
- Apr 17, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
Verify Karen C. Chang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license RPH59478Check 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
178 Medicare Part D claims for 137 beneficiaries, against an average of 119 among the 28,524 providers of this specialty who prescribed in Part D. Brand-name drugs were 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.
- Shingrix62 claims
- Arexvy55 claims
- Boostrix Tdap36 claims
- Abrysvo19 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.
6 pharmacist records list a practice address in Cotati
They are 6 of the 98 NPPES records with a practice address in Cotati, and 32,533 pharmacist records in California.
All 6 in Cotati → All 32,533 in California → Every provider in Cotati →
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 Karen C. Chang, RPH's NPI number?
Karen C. Chang, RPH's National Provider Identifier (NPI) is 1043436280, issued on Apr 17, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Karen C. Chang, RPH located?
The NPPES record lists a practice address at 31 George St, Cotati, CA, 94931. Phone: (707) 792-2010. Providers update this record themselves, so call before visiting.
How can I verify Karen C. Chang, RPH's license?
NPPES lists California license number RPH59478, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Karen C. Chang, RPH prescribe under Medicare Part D?
In 2024, Karen C. Chang, RPH had 178 Medicare Part D claims for 137 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.