Robert Alan Richardson, M.D.
Emergency Medicine Physician · Lancaster, CA
Robert Alan Richardson, M.D. is an emergency medicine physician with a practice address in Lancaster, California, and NPI 1982642179, issued on Jun 2, 2006. Check the license (California A34155, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Robert Alan Richardson
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- A34155 CA
12436 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 45104 10TH St W, Lancaster, CA 93534
- Phone
- (661) 942-2391
- Enumerated
- Jun 2, 2006
- Record last updated
- Apr 20, 2017 (not updated in 9 years: call before relying on the address or phone)
- Medicaid ID
- 205387 AZ
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 45104 10TH St W
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Jacob Carpenter, FNP-CFamily Nurse Practitioner1295199263
- Suttirak ChaiwongkarjohnSpecialist1083879084
- Kyriacos Charalambides, M.D.Geriatric Medicine (Internal Medicine) Physician1255589420
Verify Robert Alan Richardson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A34155Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
69% fewer Medicare Part D claims than the average emergency medicine physician in 2024
71 Medicare Part D claims, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
Most prescribed
- Phenobarbital11 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.
Robert Alan Richardson among 7,751 emergency medicine physician records in California
Robert Alan Richardson, M.D. is one of 7,751 emergency 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 2006, is newer than 4% of them.
- NPI issued2006 · 4% of these records are older, 60% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 59% of these records are
- Record last updated2017 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Emergency Medicine Physician providers in California
There are 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Lancaster → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Frederic Auerbach, MDLancaster, CA 935341023074713
- Mark Brown, MDLancaster, CA 935341336105675
- Frank Detrana, MDLancaster, CA 935341043275407
- Travis Deuson, MDLancaster, CA 935341598720963
- Diane Kehrli, NPLancaster, CA 935341174581532
- Thomas Lee, MDLancaster, CA 935341194781898
- Michael Leidner, MDLancaster, CA 935341538124987
- Andrew Lesser, M.D.Lancaster, CA 935341952326381
Common questions
What is Robert Alan Richardson, M.D.'s NPI number?
Robert Alan Richardson, M.D.'s National Provider Identifier (NPI) is 1982642179, issued on Jun 2, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Robert Alan Richardson, M.D. located?
The NPPES record lists a practice address at 45104 10TH St W, Lancaster, CA, 93534. Phone: (661) 942-2391. Providers update this record themselves, so call before visiting.
How can I verify Robert Alan Richardson, M.D.'s license?
NPPES lists California license number A34155, 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 Robert Alan Richardson, M.D. prescribe under Medicare Part D?
In 2024, Robert Alan Richardson, M.D. had 71 Medicare Part D claims; the average among emergency medicine physician prescribers was 226. 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.