Martha Sosa-Johnson, MD
Internal Medicine Physician · Orange, CA
Martha Sosa-Johnson, MD is an internal medicine physician with a practice address in Orange, California, and NPI 1306926530, issued on Oct 16, 2006. Check the license (California 000000G74314, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Martha Sosa-Johnson
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 000000G74314 CA
Self-reported in NPPES; status is on the state search - Practice location
- Uci Medical Center, Orange, CA 92868
- Phone
- (714) 456-8978
- Enumerated
- Oct 16, 2006
- Record last updated
- Feb 28, 2008 (not updated in 18 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20080321000186); accepts Medicare assignment
- Medical or professional school
- University Of California, San Diego School Of Medicine, 1990
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at Uci Medical Center
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Martha Sosa-Johnson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 000000G74314Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
16% fewer Medicare Part D claims than the average internal medicine physician in 2024
2,664 Medicare Part D claims for 389 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 21 claims were for opioids.
Most prescribed
- Atorvastatin Calcium268 claims
- Amlodipine Besylate228 claims
- Losartan Potassium161 claims
- Levothyroxine Sodium144 claims
- Metformin Hcl135 claims
- Lisinopril99 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
- UC RegentsOrange, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
187 internal medicine physician records list a practice address in Orange
They are 187 of the 13,245 NPPES records with a practice address in Orange, and 17,696 internal medicine physician records in California.
All 187 in Orange → All 17,696 in California → Every provider in Orange →
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- Luba Abascal, MDSan Francisco, CA1023180874
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Common questions
What is Martha Sosa-Johnson, MD's NPI number?
Martha Sosa-Johnson, MD's National Provider Identifier (NPI) is 1306926530, issued on Oct 16, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Martha Sosa-Johnson, MD located?
The NPPES record lists a practice address at Uci Medical Center, Orange, CA, 92868. Phone: (714) 456-8978. Providers update this record themselves, so call before visiting.
How can I verify Martha Sosa-Johnson, MD's license?
NPPES lists California license number 000000G74314, 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 Martha Sosa-Johnson, MD prescribe under Medicare Part D?
In 2024, Martha Sosa-Johnson, MD had 2,664 Medicare Part D claims for 389 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.