Leo Maffey, M.D.
Internal Medicine Physician · Sylmar, CA
Leo Maffey, M.D. is an internal medicine physician with a practice address in Sylmar, California, and NPI 1336342450, issued on Jun 6, 2007. Check the license on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Leo Maffey
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- Practice location
- 14445 Olive View Dr RM 6B119-H, Sylmar, CA 91342
- Phone
- (818) 364-3031
- Enumerated
- Jun 6, 2007
- Entity
- Type 1 · individual
Also registered at 14445 Olive View Dr RM 6B119-H
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Babak Daftari, M.D.Pediatrics Physician1154520930
- Payman Fathizadeh, M.D.Anatomic Pathology Physician1487845723
- Nghi Hoang, M.D.Student in an Organized Health Care Education/Training Program1700078680
Verify Leo Maffey in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of CaliforniaCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
84% more Medicare Part D claims than the average internal medicine physician in 2024
5,138 Medicare Part D claims for 463 beneficiaries, against an average of 2,785 among the 127,794 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 203 claims were for opioids.
Most prescribed
- Atorvastatin Calcium337 claims
- Amlodipine Besylate272 claims
- Losartan Potassium237 claims
- Pravastatin Sodium203 claims
- Lisinopril199 claims
- Levothyroxine Sodium159 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.
One hospital or facility affiliation
- Southern California Permanente Medical GroupGarden Grove, CA
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
84 internal medicine physician records list a Sylmar practice address
They are 84 of the 1,454 NPPES records with a Sylmar practice address, and 20,403 internal medicine physician records in California.
All 84 in Sylmar → All 20,403 in California → Every provider in Sylmar →
Other internal medicine physician records in California
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- Marce AbareScotts Valley, CA1457744708
- Samuel Abarte, M.D.Chula Vista, CA1578535498
- Alexander Abary, MDLong Beach, CA1104995919
- Luba Abascal, MDSan Francisco, CA1023180874
- Michael Abate, MDSacramento, CA1548248131
- Wali Abawi, D.O.Joshua Tree, CA1104362268
Common questions
What is Leo Maffey, M.D.'s NPI number?
Leo Maffey, M.D.'s National Provider Identifier (NPI) is 1336342450, issued on Jun 6, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Leo Maffey, M.D. located?
The NPPES record lists a practice address at 14445 Olive View Dr RM 6B119-H, Sylmar, CA, 91342. Phone: (818) 364-3031. Providers update this record themselves, so call before visiting.
How can I verify Leo Maffey, M.D.'s license?
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 Leo Maffey, M.D. prescribe under Medicare Part D?
In 2024, Leo Maffey, M.D. had 5,138 Medicare Part D claims for 463 beneficiaries; the average among internal medicine physician prescribers was 2,785. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.