Christine M. Johnston, M.D.
Family Medicine Physician · Ventura, CA
Christine M. Johnston, M.D. is a family medicine physician with a practice address in Ventura, California, and NPI 1386831188, issued on Sep 26, 2007. Check the license (California G77456, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Christine M. Johnston
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- G77456 CA
Self-reported in NPPES; status is on the state search - Practice location
- 200 S Wells RD # 200, Ventura, CA 93004
- Phone
- (805) 659-1740
- Enumerated
- Sep 26, 2007
- Record last updated
- Sep 3, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (805) 659-9959
- Medicare enrollment
- Enrolled (PECOS I20041027001038); accepts Medicare assignment
- Medical or professional school
- Oregon Health Sciences University School Of Medicine, 1992
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 200 S Wells RD # 200
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Christine M. Johnston in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G77456Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
17% fewer Medicare Part D claims than the average family medicine physician in 2024
2,942 Medicare Part D claims for 233 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 18% of claims. 26 claims were for opioids.
Most prescribed
- Atorvastatin Calcium328 claims
- Lisinopril213 claims
- Metformin Hcl213 claims
- Amlodipine Besylate170 claims
- Jardiance167 claims
- Losartan Potassium116 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
- Clinicas Del Camino Real IncSanta Paula, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Christine M. Johnston among 17,133 family medicine physician records in California
Christine M. Johnston, M.D. 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 2007, is newer than 41% of them.
- NPI issued2007 · 41% of these records are older, 47% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated1992 · median 2005 among the 10,652 with a school on file
- Record last updated2013 · 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).
234 family medicine physician records list a practice address in Ventura
They are 234 of the 4,435 NPPES records with a practice address in Ventura, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Ventura → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Fouzia Aftab, MDVentura, CA 930041013938109
- Michael Bailey, MDVentura, CA 930041770584484
- Anil Chawla, MDVentura, CA 930041790708998
- Desiree Domingo-Foraste, M.D.Ventura, CA 930041104988898
- Gagan Pawar, MDVentura, CA 930041417110586
- David Perlmutter, MDVentura, CA 930041508028192
- Ellie Rogers, D.O.Ventura, CA 930041184864449
- Nabeel Saeed, M.DVentura, CA 930041760405492
Common questions
What is Christine M. Johnston, M.D.'s NPI number?
Christine M. Johnston, M.D.'s National Provider Identifier (NPI) is 1386831188, issued on Sep 26, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Christine M. Johnston, M.D. located?
The NPPES record lists a practice address at 200 S Wells RD # 200, Ventura, CA, 93004. Phone: (805) 659-1740. Providers update this record themselves, so call before visiting.
How can I verify Christine M. Johnston, M.D.'s license?
NPPES lists California license number G77456, 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 Christine M. Johnston, M.D. prescribe under Medicare Part D?
In 2024, Christine M. Johnston, M.D. had 2,942 Medicare Part D claims for 233 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.