Javier L. Deleon, M.D.
Internal Medicine Physician · Walnut Creek, CA
Javier L. Deleon, M.D. is an internal medicine physician with a practice address in Walnut Creek, California, and NPI 1598833790, issued on Dec 4, 2006. Check the license (California A87324, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Javier L. Deleon
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A87324 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1210 Rossmoor Pkwy, Walnut Creek, CA 94595
- Phone
- (925) 933-1210
- Enumerated
- Dec 4, 2006
- Record last updated
- Dec 15, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (925) 933-2051
- Medicare enrollment
- Enrolled (PECOS I20051220001006); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 1210 Rossmoor Pkwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Epifanio Deleon, M.D.Internal Medicine Physician1124194907
- Nie Coleen Ebajay, FNP-CFamily Nurse Practitioner1811780034
- Jonathan Frank, M.D.Internal Medicine Physician1215003090
- Elizabeth Seet, M.D.Internal Medicine Physician1497821276
- Rita Sharma, PA-CPhysician Assistant1184585796
- Pedram Taher, M.DRheumatology Physician1669625125
Verify Javier L. Deleon in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A87324Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.2 times the Medicare Part D claims of the average internal medicine physician in 2024
6,917 Medicare Part D claims for 843 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims. 355 claims were for opioids.
Most prescribed
- Atorvastatin Calcium624 claims
- Amlodipine Besylate328 claims
- Lisinopril288 claims
- Losartan Potassium224 claims
- Levothyroxine Sodium196 claims
- Hydrocodone-Acetaminophen178 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: $59.84
1 payment: food and beverage; the largest payer was Atricure, Inc. The 50,334 providers of this specialty with any payment received $1,303.06 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
- Permanente Medical Group IncWalnut Creek, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Javier L. Deleon among 17,696 internal medicine physician records in California
Javier L. Deleon, M.D. is one of 17,696 internal medicine physician records with a practice address in California. 79% 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 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2002 · median 2004 among the 11,065 with a school on file
- Record last updated2021 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
183 internal medicine physician records list a practice address in Walnut Creek
They are 183 of the 6,170 NPPES records with a practice address in Walnut Creek, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Walnut Creek → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Viviane Alfandary, M.D.Walnut Creek, CA 945951053338095
- Sukhjinder Brah, M.D.Walnut Creek, CA 945951023044559
- Lonnie Bristow, M.D.Walnut Creek, CA 945951871510529
- Smita Chandra, M.D.Walnut Creek, CA 945951811917826
- Han Kyo Chang, M.DWalnut Creek, CA 945951235127150
- Russell Everest, M.D.Walnut Creek, CA 945951528085404
- Kamal Ghei, M.D.Walnut Creek, CA 945951366490120
- Lavinia Herbei, M.D.Walnut Creek, CA 945951508834946
Common questions
What is Javier L. Deleon, M.D.'s NPI number?
Javier L. Deleon, M.D.'s National Provider Identifier (NPI) is 1598833790, issued on Dec 4, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Javier L. Deleon, M.D. located?
The NPPES record lists a practice address at 1210 Rossmoor Pkwy, Walnut Creek, CA, 94595. Phone: (925) 933-1210. Providers update this record themselves, so call before visiting.
How can I verify Javier L. Deleon, M.D.'s license?
NPPES lists California license number A87324, 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 Javier L. Deleon, M.D. prescribe under Medicare Part D?
In 2024, Javier L. Deleon, M.D. had 6,917 Medicare Part D claims for 843 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.