Nayyar Siddique, MD
Hematology & Oncology Physician · Oceanside, CA
Nayyar Siddique, MD is a hematology & oncology physician with a practice address in Oceanside, California, and NPI 1497890610, issued on Feb 21, 2007. Check the license (California A62744, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Nayyar Siddique
- Credential
- MD
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License numbers
- A62744 CA
LT20873 ND
Self-reported in NPPES; status is on the state search - Practice location
- 3617 Vista Way, Oceanside, CA 92056
- Phone
- (760) 758-5770
- Enumerated
- Feb 21, 2007
- Record last updated
- Apr 18, 2024
- Fax
- (760) 721-8597
- Medicaid ID
- 00A627440 CA
- Medicare enrollment
- Enrolled (PECOS I20120208000292); accepts Medicare assignment
- Entity
- Type 1 · individual
Also registered at 3617 Vista Way
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Angela AnsonOncology Pharmacist1528993961
- Catherine Quinn, M.D.Hematology & Oncology Physician1427403641
- Himani Singh, MDHematology & Oncology Physician1558546192
- Danielle WattsPhysician Assistant1609608967
Verify Nayyar Siddique in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A62744Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
29% fewer Medicare Part D claims than the average hematology & oncology physician in 2024
620 Medicare Part D claims for 170 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 27% of claims. 27 claims were for opioids.
Most prescribed
- Letrozole67 claims
- Eliquis34 claims
- Gabapentin27 claims
- Prednisone26 claims
- Exemestane25 claims
- Prochlorperazine Maleate24 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: $1,286.52
18 payments; by number, the most common kind was long term medical supply or device loan; the largest payer was Novartis Pharmaceuticals Corporation. 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.
2 hospitals and group practices
- Enloe Specialty Physicians, IncChico, CA
- Northern Montana HospitalHavre, MT · Critical Access Hospitals
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov).
Hematology & Oncology Physician providers in California
There are 1,583 hematology & oncology physician records in California.
Other hematology & oncology physician records in California
- Mark Abate, M.D.Santa Barbara, CA1588778674
- Iman Abdalla, MDLos Angeles, CA1730248311
- Haifaa Abdulhaq, MDFresno, CA1508024647
- Nihal Abdulla, MDLos Alamitos, CA1750585345
- Mehrad Abedi, M.D.Sacramento, CA1467459222
- Oyewale Abidoye, M.D.La Jolla, CA1790841815
- Mohammed Abu Zaanona, MDSanta Barbara, CA1922591197
- Mohamad Adada, M.D., PHDRoseville, CA1528590734
- Jesse Adams, MDSacramento, CA1851479554
- Thompson Adams, MDSanta Monica, CA1407880891
Common questions
What is Nayyar Siddique, MD's NPI number?
Nayyar Siddique, MD's National Provider Identifier (NPI) is 1497890610, issued on Feb 21, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Nayyar Siddique, MD located?
The NPPES record lists a practice address at 3617 Vista Way, Oceanside, CA, 92056. Phone: (760) 758-5770. Providers update this record themselves, so call before visiting.
How can I verify Nayyar Siddique, MD's license?
NPPES lists California license number A62744, 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 Nayyar Siddique, MD prescribe under Medicare Part D?
In 2024, Nayyar Siddique, MD had 620 Medicare Part D claims for 170 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.