Robert William Buster, M.D.
Geriatric Medicine (Internal Medicine) Physician · Orange, CA
Robert William Buster, M.D. is a geriatric medicine (internal medicine) physician with a practice address in Orange, California, and NPI 1841343076, issued on Jan 19, 2007. Check the license (California A24799, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Robert William Buster
- Credential
- M.D.
- Primary taxonomy
- Geriatric Medicine (Internal Medicine) Physician 207RG0300X
- License number
- A24799 CA
Self-reported in NPPES; status is on the state search - Practice location
- 845 W LA Veta Ave Ste 108, Orange, CA 92868
- Phone
- (714) 639-2600
- Enumerated
- Jan 19, 2007
- Record last updated
- Oct 15, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (714) 289-3906
- Entity
- Type 1 · individual
8 nearest geriatric medicine (internal medicine) physician records → All 532 in California → Look up another NPI →
Also registered at 845 W LA Veta Ave Ste 108
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Fatima Ajaz, M.DPulmonary Disease Physician1477731461
- Jeremy Feck, DOFamily Medicine Physician1851920904
- Anne Gonzales, MSN-FNPNurse Practitioner1942935705
- Christos Howard, MDFamily Medicine Physician1437140811
- Mahmoud Moammar, MDPulmonary Disease Physician1952500696
- Kasra Morshedizadeh, M.D.Internal Medicine Physician1528078672
Verify Robert William Buster in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A24799Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
100% fewer Medicare Part D claims than the average geriatric medicine (internal medicine) physician in 2024
21 Medicare Part D claims, against an average of 4,246 among the 3,116 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 William Buster among 532 geriatric medicine (internal medicine) physician records in California
Robert William Buster, M.D. is one of 532 geriatric medicine (internal medicine) physician records with a practice address in California. 77% 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 54% of them.
- NPI issued2007 · 54% of these records are older, 34% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileNo · 51% of these records are
- Record last updated2021 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0300X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Geriatric Medicine (Internal Medicine) Physician providers in California
There are 532 geriatric medicine (internal medicine) physician records in California.
All 532 in California → Every provider in Orange → Geriatric Medicine (Internal Medicine) Physician nationwide →
The 8 geriatric medicine (internal medicine) physician records with the nearest ZIP codes
- Mary Harward, M.D.Orange, CA 928681407835275
- Kassandra King, DOOrange, CA 928681215498936
- K.a. Manisha PereraOrange, CA 928681952783862
- Angela Tan, MDOrange, CA 928681437358173
- Kenneth Tram, MDOrange, CA 928681700875911
- Xaviour Walker, M.D.Orange, CA 928681104151042
- Shashidar Acharya, M.D.Orange, CA 928661770685521
- Giselle Seron, MDGarden Grove, CA 928441790858900
Common questions
What is Robert William Buster, M.D.'s NPI number?
Robert William Buster, M.D.'s National Provider Identifier (NPI) is 1841343076, issued on Jan 19, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Robert William Buster, M.D. located?
The NPPES record lists a practice address at 845 W LA Veta Ave Ste 108, Orange, CA, 92868. Phone: (714) 639-2600. Providers update this record themselves, so call before visiting.
How can I verify Robert William Buster, M.D.'s license?
NPPES lists California license number A24799, 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 William Buster, M.D. prescribe under Medicare Part D?
In 2024, Robert William Buster, M.D. had 21 Medicare Part D claims; the average among geriatric medicine (internal medicine) physician prescribers was 4,246. 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.