Violeta Vallejo-Sinavsky, M.D.
NPI 1013042357 · Internal Medicine Physician · Lancaster, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Violeta Vallejo-Sinavsky, M.D. is a Internal Medicine Physician provider in Lancaster, CA (NPI 1013042357).
Provider details
- NPI number
- 1013042357
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- C42618 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
47 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 17 | $9 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 17 | $99 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 13 | $8 |
Typical Medicare-allowed amounts for these services range $8–$99 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-02-23
- Last updated
- 2007-07-08
Frequently asked questions
- What is Violeta Vallejo-Sinavsky's NPI number?
- Violeta Vallejo-Sinavsky's National Provider Identifier (NPI) is 1013042357, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Violeta Vallejo-Sinavsky's specialty?
- Violeta Vallejo-Sinavsky is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Violeta Vallejo-Sinavsky located?
- Violeta Vallejo-Sinavsky's practice location on file with NPPES is 44900 60th St W, Lancaster, CA 93536-7618.
- What is Violeta Vallejo-Sinavsky's phone number?
- The practice phone number listed in the NPPES registry for Violeta Vallejo-Sinavsky is (661) 948-8581.
- Does Violeta Vallejo-Sinavsky accept Medicare?
- Violeta Vallejo-Sinavsky is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Violeta Vallejo-Sinavsky's NPI active?
- Yes — Violeta Vallejo-Sinavsky's NPI (1013042357) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.