Jonathan D. Lopez, MD
Hematology & Oncology Physician · Fairfield, CA
Jonathan D. Lopez, MD is a hematology & oncology physician with a practice address in Fairfield, California, and NPI 1881682714, issued on Oct 13, 2005. Check the license (California A102015, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Jonathan D. Lopez
- Credential
- MD
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- A102015 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1860 Pennsylvania Ave, Fairfield, CA 94533
- Phone
- (707) 646-4000
- Enumerated
- Oct 13, 2005
- Record last updated
- Mar 7, 2023
- Fax
- (707) 646-4004
- Medicare enrollment
- Enrolled (PECOS I20111025000035); accepts Medicare assignment
- Medical or professional school
- Uniformed Services Uhs Fe Hebert School Of Med, 1998
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 1,583 in California → Look up another NPI →
Also registered at 1860 Pennsylvania Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Donald Doyle, MDPulmonary Disease Physician1699766220
Verify Jonathan D. Lopez in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A102015Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
31% more Medicare Part D claims than the average hematology & oncology physician in 2024
1,145 Medicare Part D claims for 166 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. 140 claims were for opioids.
Most prescribed
- Lorazepam64 claims
- Ondansetron Hcl59 claims
- Anastrozole56 claims
- Dexamethasone48 claims
- Oxycodone Hcl41 claims
- Aprepitant40 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: $211.07
9 payments; by number, the most common kind was food and beverage; the largest payer was Pfizer Inc. The 8,560 providers of this specialty with any payment received $7,481.41 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
- Northbay Physicians Surgery Center, LLCFairfield, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jonathan D. Lopez among 1,583 hematology & oncology physician records in California
Jonathan D. Lopez, MD is one of 1,583 hematology & oncology physician records with a practice address in California. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 92% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated1998 · median 2003 among the 1,124 with a school on file
- Record last updated2023 · 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 207RH0003X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology & Oncology Physician providers in California
There are 1,583 hematology & oncology physician records in California.
All 1,583 in California → Every provider in Fairfield → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Yelena Krijanovski, M.D.Fairfield, CA 945341497877500
- Kanwaldeep Rasila, M.D.Fairfield, CA 945341649492166
- Jiyon Choi, MDAntioch, CA 945311144437567
- John Ganey, MDAntioch, CA 945311215935713
- William Huang, MDTravis Afb, CA 945351821177569
- Jacob Kjelland, MDTravis Afb, CA 945351043604606
- Vasyl Nesteryuk, DOTravis Afb, CA 945351851896732
- Bimal Patel, M.D.Antioch, CA 945311841298221
Common questions
What is Jonathan D. Lopez, MD's NPI number?
Jonathan D. Lopez, MD's National Provider Identifier (NPI) is 1881682714, issued on Oct 13, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Jonathan D. Lopez, MD located?
The NPPES record lists a practice address at 1860 Pennsylvania Ave, Fairfield, CA, 94533. Phone: (707) 646-4000. Providers update this record themselves, so call before visiting.
How can I verify Jonathan D. Lopez, MD's license?
NPPES lists California license number A102015, 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 Jonathan D. Lopez, MD prescribe under Medicare Part D?
In 2024, Jonathan D. Lopez, MD had 1,145 Medicare Part D claims for 166 beneficiaries; the average among hematology & oncology physician prescribers was 877. 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.