Marilyn Majeo Deguzman, DO
Family Medicine Physician · Pomona, CA
Marilyn Majeo Deguzman, DO is a family medicine physician with a practice address in Pomona, California, and NPI 1780761718, issued on Nov 1, 2006. Check the license (California 20A10190, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Marilyn Majeo Deguzman
- Credential
- DO
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 20A10190 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1770 N Orange Grove Ave, Pomona, CA 91767
- Phone
- (909) 469-9494
- Enumerated
- Nov 1, 2006
- Record last updated
- Dec 2, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (909) 398-9809
- Medicare enrollment
- Enrolled (PECOS I20091202000434); accepts Medicare assignment
- Medical or professional school
- Western University Of Health Sciences College Of Dental Med, 2006
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 1770 N Orange Grove Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Marilyn Majeo Deguzman in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A10190Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
12% more Medicare Part D claims than the average family medicine physician in 2024
3,955 Medicare Part D claims for 384 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims. 187 claims were for opioids.
Most prescribed
- Atorvastatin Calcium294 claims
- Losartan Potassium202 claims
- Rosuvastatin Calcium190 claims
- Amlodipine Besylate162 claims
- Levothyroxine Sodium140 claims
- Atenolol121 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.
Bills Medicare through one group practice
- Southern California Permanente Medical GroupSan Diego, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Marilyn Majeo Deguzman among 17,133 family medicine physician records in California
Marilyn Majeo Deguzman, DO is one of 17,133 family medicine physician records with a practice address in California. 81% 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 6% of them.
- NPI issued2006 · 6% of these records are older, 59% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2006 · median 2005 among the 10,652 with a school on file
- Record last updated2021 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
78 family medicine physician records list a practice address in Pomona
They are 78 of the 5,102 NPPES records with a practice address in Pomona, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Pomona → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Snezana Begovic, MDPomona, CA 917671033135736
- Douglas Chiriboga, MDPomona, CA 917671225038342
- April Ford, MDPomona, CA 917671023045283
- Jaime Gonzalez, M.D.Pomona, CA 917671235180563
- Roger Hall, DOPomona, CA 917671336118579
- Sudathi Jeereddi, MDPomona, CA 917671609844984
- Randy Karu, M.D.Pomona, CA 917671386645760
- Keith Kusunis, MDPomona, CA 917671033110945
Common questions
What is Marilyn Majeo Deguzman, DO's NPI number?
Marilyn Majeo Deguzman, DO's National Provider Identifier (NPI) is 1780761718, issued on Nov 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Marilyn Majeo Deguzman, DO located?
The NPPES record lists a practice address at 1770 N Orange Grove Ave, Pomona, CA, 91767. Phone: (909) 469-9494. Providers update this record themselves, so call before visiting.
How can I verify Marilyn Majeo Deguzman, DO's license?
NPPES lists California license number 20A10190, 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 Marilyn Majeo Deguzman, DO prescribe under Medicare Part D?
In 2024, Marilyn Majeo Deguzman, DO had 3,955 Medicare Part D claims for 384 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.