Maruja Del Valle Diaz Arjonilla, MD
Endocrinology, Diabetes & Metabolism Physician · Santa Ana, CA
Maruja Del Valle Diaz Arjonilla, MD is an endocrinology, diabetes & metabolism physician with a practice address in Santa Ana, California, and NPI 1841481074, issued on Aug 5, 2007. Check the license (California A97144, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Maruja Del Valle Diaz Arjonilla
- Credential
- MD
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License number
- A97144 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2212 E 4TH St Ste 304, Santa Ana, CA 92705
- Phone
- (714) 288-3230
- Enumerated
- Aug 5, 2007
- Record last updated
- Oct 21, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (714) 571-7719
- Medicare enrollment
- Enrolled (PECOS I20090325000198); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 1,131 in California → Look up another NPI →
Verify Maruja Del Valle Diaz Arjonilla in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A97144Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
43% more Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
3,760 Medicare Part D claims for 396 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 52% of claims.
Most prescribed
- Levothyroxine Sodium424 claims
- Metformin Hcl Er340 claims
- Lantus Solostar293 claims
- Ozempic286 claims
- Glipizide Er274 claims
- Nano 2nd Gen Pen Needle202 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: $143.35
8 payments; by number, the most common kind was food and beverage; the largest payer was Insulet Corporation. The 5,661 providers of this specialty with any payment received $5,742.15 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.
Bills Medicare through one group practice
- Providence Medical FoundationOrange, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Maruja Del Valle Diaz Arjonilla among 1,131 endocrinology, diabetes & metabolism physician records in California
Maruja Del Valle Diaz Arjonilla, MD is one of 1,131 endocrinology, diabetes & metabolism physician records with a practice address in California. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 46% of them.
- NPI issued2007 · 46% of these records are older, 42% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated1990 · median 2003 among the 779 with a school on file
- Record last updated2020 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in California
There are 1,131 endocrinology, diabetes & metabolism physician records in California.
All 1,131 in California → Every provider in Santa Ana → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Jinsun Choi, M.D.North Tustin, CA 927051538310131
- Yana Stolyarov, M.DSanta Ana, CA 927041982996799
- Phong Bui, MDFountain Valley, CA 927081316177462
- Bachar Kurdi, M.D.Fountain Valley, CA 927081750483327
- Chris Tsimerekis, M.D.Fountain Valley, CA 927081942311832
- Anna Betlachin, MDIrvine, CA 926971396190567
- Neal Maler, MDIrvine, CA 926971497276547
- Qin YangIrvine, CA 926971649408444
Common questions
What is Maruja Del Valle Diaz Arjonilla, MD's NPI number?
Maruja Del Valle Diaz Arjonilla, MD's National Provider Identifier (NPI) is 1841481074, issued on Aug 5, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Maruja Del Valle Diaz Arjonilla, MD located?
The NPPES record lists a practice address at 2212 E 4TH St Ste 304, Santa Ana, CA, 92705. Phone: (714) 288-3230. Providers update this record themselves, so call before visiting.
How can I verify Maruja Del Valle Diaz Arjonilla, MD's license?
NPPES lists California license number A97144, 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 Maruja Del Valle Diaz Arjonilla, MD prescribe under Medicare Part D?
In 2024, Maruja Del Valle Diaz Arjonilla, MD had 3,760 Medicare Part D claims for 396 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. 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.