Katherine Pierson, MD
Family Medicine Physician · Vacaville, CA
Katherine Pierson, MD is a family medicine physician with a practice address in Vacaville, California, and NPI 1831659457, issued on Mar 20, 2019. Check the license (California A190510, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Katherine Pierson
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- A190510 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1 Quality Dr, Vacaville, CA 95688
- Phone
- (707) 624-4000
- Enumerated
- Mar 20, 2019
- Record last updated
- Jul 9, 2024
- Fax
- (707) 624-3801
- Medicare enrollment
- Enrolled (PECOS I20231005003762); accepts Medicare assignment
- Medical or professional school
- State University Of New York At Stony Brook, School Of Medicine, 2018
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 1 Quality Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Katherine Pierson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A190510Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
24% more Medicare Part D claims than the average family medicine physician in 2024
4,386 Medicare Part D claims for 478 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 250 claims were for opioids.
Most prescribed
- Atorvastatin Calcium235 claims
- Albuterol Sulfate Hfa149 claims
- Hydrocodone-Acetaminophen146 claims
- Amlodipine Besylate131 claims
- Levothyroxine Sodium130 claims
- Losartan Potassium122 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.
Bills Medicare through one group practice
- Permanente Medical Group IncVacaville, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Katherine Pierson among 17,133 family medicine physician records in California
Katherine Pierson, MD is one of 17,133 family medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 85% of them.
- NPI issued2019 · 85% of these records are older, 12% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2018 · median 2005 among the 10,652 with a school on file
- Record last updated2024 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
56 family medicine physician records list a practice address in Vacaville
They are 56 of the 1,903 NPPES records with a practice address in Vacaville, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Vacaville → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Azim Ahmady, MDVacaville, CA 956881417035916
- Teresa Auyeung, MDVacaville, CA 956881780771154
- Raquel Cripe, M.D.Vacaville, CA 956881912922782
- Ricardo Denapoli, D.O.Vacaville, CA 956881295703189
- Peaslee Dumont, MDVacaville, CA 956881588748768
- Michael Earwood, MDVacaville, CA 956881932287828
- Gail Feinberg, DOVacaville, CA 956881194760025
- Behroz Hamkar, M.D.Vacaville, CA 956881073525036
Common questions
What is Katherine Pierson, MD's NPI number?
Katherine Pierson, MD's National Provider Identifier (NPI) is 1831659457, issued on Mar 20, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Katherine Pierson, MD located?
The NPPES record lists a practice address at 1 Quality Dr, Vacaville, CA, 95688. Phone: (707) 624-4000. Providers update this record themselves, so call before visiting.
How can I verify Katherine Pierson, MD's license?
NPPES lists California license number A190510, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Katherine Pierson, MD prescribe under Medicare Part D?
In 2024, Katherine Pierson, MD had 4,386 Medicare Part D claims for 478 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.