Errisha M. Richardson, MD
Internal Medicine Physician · Antioch, CA
Errisha M. Richardson, MD is an internal medicine physician with a practice address in Antioch, California, and NPI 1982266649, issued on Jul 2, 2019. Check the license on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Errisha M. Richardson
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 2019023757 MO
Self-reported in NPPES; status is on the state search - Practice location
- 4457 Rock Island Dr, Antioch, CA 94509
- Phone
- (573) 882-4438
- Enumerated
- Jul 2, 2019
- Record last updated
- Jun 29, 2026
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 4457 Rock Island Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Fiera Foreman, NPPsychiatric/Mental Health Nurse Practitioner1801487558
- Brenda Richardson, NPFamily Nurse Practitioner1528656709
Verify Errisha M. Richardson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of CaliforniaCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
89% fewer Medicare Part D claims than the average internal medicine physician in 2024
358 Medicare Part D claims for 78 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Lisinopril19 claims
- Levothyroxine Sodium18 claims
- Amlodipine Besylate17 claims
- Pantoprazole Sodium16 claims
- Furosemide15 claims
- Atorvastatin Calcium12 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.
Errisha M. Richardson among 17,696 internal medicine physician records in California
Errisha M. Richardson, MD is one of 17,696 internal medicine physician records with a practice address in California. 79% 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 86% of them.
- NPI issued2019 · 86% of these records are older, 11% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2026 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
66 internal medicine physician records list a practice address in Antioch
They are 66 of the 2,184 NPPES records with a practice address in Antioch, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Antioch → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Nazish Ali, M.D.Antioch, CA 945091932121498
- Irina Bronstein, MDAntioch, CA 945091972681039
- Anita Cherian, MDAntioch, CA 945091306924402
- Carl Corrigan, MDAntioch, CA 945091285712349
- Waldo Ferrer, MDAntioch, CA 945091881772978
- P. Gunanayagam, MDAntioch, CA 945091811075997
- Dileep Kumar, M.D.Antioch, CA 945091649290206
- Kishore Maskey, MDAntioch, CA 945091568540631
Common questions
What is Errisha M. Richardson, MD's NPI number?
Errisha M. Richardson, MD's National Provider Identifier (NPI) is 1982266649, issued on Jul 2, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Errisha M. Richardson, MD located?
The NPPES record lists a practice address at 4457 Rock Island Dr, Antioch, CA, 94509. Phone: (573) 882-4438. Providers update this record themselves, so call before visiting.
How can I verify Errisha M. Richardson, MD's license?
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 Errisha M. Richardson, MD prescribe under Medicare Part D?
In 2024, Errisha M. Richardson, MD had 358 Medicare Part D claims for 78 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.