Shaun Shiv Singh, DO
Internal Medicine Physician · Downey, CA
Shaun Shiv Singh, DO is an internal medicine physician with a practice address in Downey, California, and NPI 1871054684, issued on Mar 26, 2019. Check the license (California 20A19788, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Shaun Shiv Singh
- Credential
- DO
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 20A19788 CA
Self-reported in NPPES; status is on the state search - Practice location
- 10441 Lakewood Blvd Ste AB, Downey, CA 90241
- Phone
- (714) 443-4512
- Enumerated
- Mar 26, 2019
- Record last updated
- Nov 28, 2025
- Medicare enrollment
- Enrolled (PECOS I20241016003772); accepts Medicare assignment
- Medical or professional school
- College Of Osteo Med Of The Pacific At Pomona, 2019
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 10441 Lakewood Blvd Ste AB
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Anne Gail ApostolNurse Practitioner1801633805
- Sophie-Chizoma Asogu-Nwosu, NURSE PRACTITIONERNurse Practitioner1538718598
- Raj Balasundaram, M.D.Internal Medicine Physician1083840367
- Simon Chang, M.D.Family Medicine Physician1760594097
- David Chen, MDInternal Medicine Physician1295315489
Verify Shaun Shiv Singh in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A19788Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
91% fewer Medicare Part D claims than the average internal medicine physician in 2024
299 Medicare Part D claims for 114 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 16 claims were for opioids.
Most prescribed
- Pantoprazole Sodium20 claims
- Atorvastatin Calcium17 claims
- Furosemide17 claims
- Amlodipine Besylate11 claims
- Cephalexin11 claims
- Levofloxacin11 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
- Healthcare Partners Affiliates Medical GroupDowney, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Shaun Shiv Singh among 17,696 internal medicine physician records in California
Shaun Shiv Singh, DO 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 2019, is newer than 86% of them.
- NPI issued2019 · 86% of these records are older, 11% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2019 · median 2004 among the 11,065 with a school on file
- Record last updated2025 · 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).
114 internal medicine physician records list a practice address in Downey
They are 114 of the 3,607 NPPES records with a practice address in Downey, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Downey → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Nazar Al-Bussam, MDDowney, CA 902411003999145
- Domingo Barrientos, M.D.Downey, CA 902411184685281
- Arthur Carrasco, M.D.Downey, CA 902411588601595
- Shahryar Davari, MDDowney, CA 902411346244373
- Henry Do, M.D.Downey, CA 902411538115290
- Alan Frischer, M.D.Downey, CA 902411982701454
- Narayana Gunda, M.D.Downey, CA 902411720026271
- Vinod Patel, M.D.Downey, CA 902411043226756
Common questions
What is Shaun Shiv Singh, DO's NPI number?
Shaun Shiv Singh, DO's National Provider Identifier (NPI) is 1871054684, issued on Mar 26, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Shaun Shiv Singh, DO located?
The NPPES record lists a practice address at 10441 Lakewood Blvd Ste AB, Downey, CA, 90241. Phone: (714) 443-4512. Providers update this record themselves, so call before visiting.
How can I verify Shaun Shiv Singh, DO's license?
NPPES lists California license number 20A19788, 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 Shaun Shiv Singh, DO prescribe under Medicare Part D?
In 2024, Shaun Shiv Singh, DO had 299 Medicare Part D claims for 114 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.