Mary Caizza Cerni, D.O.
Adult Medicine Physician · Placentia, CA
Mary Caizza Cerni, D.O. is an adult medicine physician with a practice address in Placentia, California, and NPI 1164519989, issued on Oct 5, 2006. Check the license (California 20A5318, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mary Caizza Cerni
- Credential
- D.O.
- Primary taxonomy
- Adult Medicine Physician 207QA0505X
- License number
- 20A5318 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1325 N Rose Dr, Placentia, CA 92870
- Phone
- (714) 529-5674
- Enumerated
- Oct 5, 2006
- Record last updated
- Mar 17, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (714) 529-6122
- Entity
- Type 1 · individual
8 nearest adult medicine physician records → All 386 in California → Look up another NPI →
Also registered at 1325 N Rose Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Lisa Wheadon, NPFamily Nurse Practitioner1770926594
Verify Mary Caizza Cerni in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A5318Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
27% more Medicare Part D claims than the average adult medicine physician in 2024
3,799 Medicare Part D claims for 376 beneficiaries, against an average of 3,002 among the 1,307 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 134 claims were for opioids.
Most prescribed
- Amlodipine Besylate229 claims
- Levothyroxine Sodium187 claims
- Losartan Potassium162 claims
- Metformin Hcl137 claims
- Rosuvastatin Calcium126 claims
- Atorvastatin Calcium122 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.
Industry payments in 2024: $375.81
13 payments; by number, the most common kind was food and beverage; the largest payer was GlaxoSmithKline, LLC. The 664 providers of this specialty with any payment received $1,405.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Mary Caizza Cerni among 386 adult medicine physician records in California
Mary Caizza Cerni, D.O. is one of 386 adult medicine physician records with a practice address in California. 69% 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 3% of them.
- NPI issued2006 · 3% of these records are older, 65% newer
- In a Medicare fileYes · 69% of these records are
- In the CMS Doctors and Clinicians fileNo · 48% of these records are
- Record last updated2015 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207QA0505X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Adult Medicine Physician providers in California
There are 386 adult medicine physician records in California.
All 386 in California → Every provider in Placentia → Adult Medicine Physician nationwide →
The 8 adult medicine physician records with the nearest ZIP codes
- Sean Breen, D.O.Orance, CA 928691780839217
- Philip Madrid, MDOrange, CA 928691578523692
- Jack Mossler, MDOrange, CA 928691619234887
- Janja Viltuznik, M.D.Orange, CA 928691639182702
- Maryann Nuesse, D.O.Orange, CA 928661689633455
- William Nuesse, M.D.Orange, CA 928661952360729
- Harry EisenbachVilla Park, CA 928611619597671
- Kathryn Gibbs, M.D.Villa Park, CA 928611124238308
Common questions
What is Mary Caizza Cerni, D.O.'s NPI number?
Mary Caizza Cerni, D.O.'s National Provider Identifier (NPI) is 1164519989, issued on Oct 5, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mary Caizza Cerni, D.O. located?
The NPPES record lists a practice address at 1325 N Rose Dr, Placentia, CA, 92870. Phone: (714) 529-5674. Providers update this record themselves, so call before visiting.
How can I verify Mary Caizza Cerni, D.O.'s license?
NPPES lists California license number 20A5318, 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 Mary Caizza Cerni, D.O. prescribe under Medicare Part D?
In 2024, Mary Caizza Cerni, D.O. had 3,799 Medicare Part D claims for 376 beneficiaries; the average among adult medicine physician prescribers was 3,002. 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.