Robert M. Olson, M.D.
General Practice Physician · Lake Arrowhead, CA
Robert M. Olson, M.D. is a general practice physician with a practice address in Lake Arrowhead, California, and NPI 1881079119, issued on Jul 28, 2015. Check the license (California G56043, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Robert M. Olson
- Credential
- M.D.
- Primary taxonomy
- General Practice Physician 208D00000X
- License number
- G56043 CA
Self-reported in NPPES; status is on the state search - Practice location
- 251 N Hwy 173, Lake Arrowhead, CA 92321
- Phone
- (909) 336-3670
- Enumerated
- Jul 28, 2015
- Record last updated
- Jul 28, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (909) 336-3674
- Entity
- Type 1 · individual
8 nearest general practice physician records → All 1,956 in California → Look up another NPI →
Also registered at 251 N Hwy 173
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Martin Rocha, M.D.Pediatrics Physician1962435586
Verify Robert M. Olson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G56043Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average general practice physician in 2024
39 Medicare Part D claims, against an average of 3,030 among the 8,395 providers of this specialty who prescribed in Part D.
Most prescribed
- Dextroamphetamine-Amphetamine11 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 M. Olson among 1,956 general practice physician records in California
Robert M. Olson, M.D. is one of 1,956 general practice physician records with a practice address in California. 48% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 74% of them.
- NPI issued2015 · 74% of these records are older, 24% newer
- In a Medicare fileYes · 48% of these records are
- In the CMS Doctors and Clinicians fileNo · 27% of these records are
- Record last updated2015 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208D00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1 general practice physician record lists a practice address in Lake Arrowhead
They are 1 of the 72 NPPES records with a practice address in Lake Arrowhead, and 1,956 general practice physician records in California.
All 1,956 in California → Every provider in Lake Arrowhead → General Practice Physician nationwide →
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Common questions
What is Robert M. Olson, M.D.'s NPI number?
Robert M. Olson, M.D.'s National Provider Identifier (NPI) is 1881079119, issued on Jul 28, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Robert M. Olson, M.D. located?
The NPPES record lists a practice address at 251 N Hwy 173, Lake Arrowhead, CA, 92321. Phone: (909) 336-3670. Providers update this record themselves, so call before visiting.
How can I verify Robert M. Olson, M.D.'s license?
NPPES lists California license number G56043, 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 M. Olson, M.D. prescribe under Medicare Part D?
In 2024, Robert M. Olson, M.D. had 39 Medicare Part D claims; the average among general practice physician prescribers was 3,030. 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.