Ronald Marc Baum, M.D.
Specialist · Calabasas, CA
Ronald Marc Baum, M.D. is a specialist with a practice address in Calabasas, California, and NPI 1164412375, issued on Oct 27, 2005. Check the license (California A93128, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Ronald Marc Baum
- Credential
- M.D.
- Primary taxonomy
- Specialist 174400000X
- License number
- A93128 CA
Self-reported in NPPES; status is on the state search - Practice location
- 22343 Delia CT, Calabasas, CA 91302
- Phone
- (818) 888-4577
- Enumerated
- Oct 27, 2005
- Record last updated
- Aug 11, 2022
- Fax
- (818) 888-4579
- Medicare enrollment
- Enrolled (PECOS I20070125000268); accepts Medicare assignment
- Medical or professional school
- Rush Medical College Of Rush University, 1979
- Entity
- Type 1 · individual
Verify Ronald Marc Baum in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license A93128Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
87% fewer Medicare Part D claims than the average specialist in 2024
175 Medicare Part D claims for 15 beneficiaries, against an average of 1,380 among the 8,233 providers of this specialty who prescribed in Part D.
Most prescribed
- Sertraline Hcl22 claims
- Tegretol Xr18 claims
- Ziprasidone Hcl13 claims
- Alprazolam12 claims
- Fluoxetine Hcl11 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.
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Common questions
What is Ronald Marc Baum, M.D.'s NPI number?
Ronald Marc Baum, M.D.'s National Provider Identifier (NPI) is 1164412375, issued on Oct 27, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Ronald Marc Baum, M.D. located?
The NPPES record lists a practice address at 22343 Delia CT, Calabasas, CA, 91302. Phone: (818) 888-4577. Providers update this record themselves, so call before visiting.
How can I verify Ronald Marc Baum, M.D.'s license?
NPPES lists California license number A93128, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Ronald Marc Baum, M.D. prescribe under Medicare Part D?
In 2024, Ronald Marc Baum, M.D. had 175 Medicare Part D claims for 15 beneficiaries; the average among specialist prescribers was 1,380. 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.