Violeta Vallejo-Sinavsky, M.D.
Internal Medicine Physician · Lancaster, CA
Violeta Vallejo-Sinavsky, M.D. is an internal medicine physician with a practice address in Lancaster, California, and NPI 1013042357, issued on Feb 23, 2007. Check the license (California C42618, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Violeta Vallejo-Sinavsky
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- C42618 CA
Self-reported in NPPES; status is on the state search - Practice location
- 44900 60TH St W, Lancaster, CA 93536
- Phone
- (661) 948-8581
- Enumerated
- Feb 23, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (661) 945-8474
- Medicare enrollment
- Enrolled (PECOS I20090727000726); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 44900 60TH St W
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Nancy Breen, R. N., N.P.Nurse Practitioner1144346594
- Yesenia Castellon, N.P.Family Nurse Practitioner1184927741
- Lessette Cetto, RNPPediatric Nurse Practitioner1134476799
- Canagaretnam Chandradas, M.D.Internal Medicine Physician1093840936
- Dorothy Copeland, R.N., N.P.Nurse Practitioner1831228931
- Henry Elwood, R.N., C.R.N.A.Certified Registered Nurse Anesthetist1710022926
Verify Violeta Vallejo-Sinavsky in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C42618Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average internal medicine physician in 2024
51 Medicare Part D claims for 24 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
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
- County OF Los AngelesCompton, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Violeta Vallejo-Sinavsky among 17,696 internal medicine physician records in California
Violeta Vallejo-Sinavsky, 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 2007, is newer than 44% of them.
- NPI issued2007 · 44% of these records are older, 44% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1969 · median 2004 among the 11,065 with a school on file
- Record last updated2007 · 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).
55 internal medicine physician records list a practice address in Lancaster
They are 55 of the 4,273 NPPES records with a practice address in Lancaster, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Lancaster → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Canagaretnam Chandradas, M.D.Lancaster, CA 935361093840936
- Junaid Fitter, M.D.Lancaster, CA 935361255466835
- Ethan HsuLancaster, CA 935361982270401
- Ali Jafferi, M.D.Lancaster, CA 935361912042235
- Kartikey Mehta, M.D.Lancaster, CA 935361184750473
- Jose Pascual, M.D.Lancaster, CA 935361306981683
- Marvin Ross, M.D.Lancaster, CA 935361659408227
- Sangar Selva, MDLancaster, CA 935361114957925
Common questions
What is Violeta Vallejo-Sinavsky, M.D.'s NPI number?
Violeta Vallejo-Sinavsky, M.D.'s National Provider Identifier (NPI) is 1013042357, issued on Feb 23, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Violeta Vallejo-Sinavsky, M.D. located?
The NPPES record lists a practice address at 44900 60TH St W, Lancaster, CA, 93536. Phone: (661) 948-8581. Providers update this record themselves, so call before visiting.
How can I verify Violeta Vallejo-Sinavsky, M.D.'s license?
NPPES lists California license number C42618, 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 Violeta Vallejo-Sinavsky, M.D. prescribe under Medicare Part D?
In 2024, Violeta Vallejo-Sinavsky, M.D. had 51 Medicare Part D claims for 24 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.