Robert Charles Armen, M.D.
Infectious Disease Physician · Orange, CA
Robert Charles Armen, M.D. is an infectious disease physician with a practice address in Orange, California, and NPI 1225041080, issued on Aug 14, 2006. Check the license (California G44875, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Robert Charles Armen
- Credential
- M.D.
- Primary taxonomy
- Infectious Disease Physician 207RI0200X
- License number
- G44875 CA
Self-reported in NPPES; status is on the state search - Practice location
- 845 W LA Veta Ave, Orange, CA 92868
- Phone
- (714) 289-7171
- Enumerated
- Aug 14, 2006
- Record last updated
- Mar 27, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (714) 289-7177
- Medicaid ID
- 00G448750 CA
- Entity
- Type 1 · individual
8 nearest infectious disease physician records → All 1,119 in California → Look up another NPI →
Also registered at 845 W LA Veta Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Robert Charles Armen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G44875Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average infectious disease physician in 2024
26 Medicare Part D claims, against an average of 689 among the 7,388 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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 Charles Armen among 1,119 infectious disease physician records in California
Robert Charles Armen, M.D. is one of 1,119 infectious disease 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 2006, is newer than 4% of them.
- NPI issued2006 · 4% of these records are older, 54% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 66% of these records are
- Record last updated2014 · 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 207RI0200X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Infectious Disease Physician providers in California
There are 1,119 infectious disease physician records in California.
All 1,119 in California → Every provider in Orange → Infectious Disease Physician nationwide →
The 8 infectious disease physician records with the nearest ZIP codes
- Rosa Andrade, MDOrange, CA 928681093919680
- Thomas C Cesario, MDOrange, CA 928681265512354
- Coleen Cunningham, M.D.Orange, CA 928681205999075
- Catherine Diamond, MDOrange, CA 928681649350786
- Donald N Forthal, MDOrange, CA 928681215017363
- Shruti Gohil, M.D., M.P.H.Orange, CA 928681851375398
- Geeta K Gupta, MDOrange, CA 928681558441600
- Peter Heseltine, MD, FACPOrange, CA 928681487771432
Common questions
What is Robert Charles Armen, M.D.'s NPI number?
Robert Charles Armen, M.D.'s National Provider Identifier (NPI) is 1225041080, issued on Aug 14, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Robert Charles Armen, M.D. located?
The NPPES record lists a practice address at 845 W LA Veta Ave, Orange, CA, 92868. Phone: (714) 289-7171. Providers update this record themselves, so call before visiting.
How can I verify Robert Charles Armen, M.D.'s license?
NPPES lists California license number G44875, 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 Charles Armen, M.D. prescribe under Medicare Part D?
In 2024, Robert Charles Armen, M.D. had 26 Medicare Part D claims; the average among infectious disease physician prescribers was 689. 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.