DR. OLGA SINYAVSKAYA MD
NPI 1861052342
Psychiatry & Neurology - Child & Adolescent Psychiatry in Boston, MA
About Dr. Olga Sinyavskaya Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. OLGA SINYAVSKAYA MD (NPI 1861052342) is an individual child & adolescent psychiatry provider in Boston, Massachusetts, licensed in Massachusetts (292756) and active in the NPI registry since June 2019. She is enrolled in Medicare PECOS and is a graduate of University Of Chicago, Pritzker School Of Medicine (2019).
NPPES Registry Identity
Specialties & Licenses
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Olga Sinyavskaya Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
3Medicare enrollment records show Olga Sinyavskaya reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Boston, MA 02114
- Reassigned Medicare billing, Massachusetts enrollment
- 6,360 clinicians in this Medicare group
Boston, MA 02114
- Reassigned Medicare billing, Massachusetts enrollment
- 6,234 clinicians in this Medicare group
Cambridge, MA 02139
- Reassigned Medicare billing, Massachusetts enrollment
- 362 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
BOSTON, MA 02114
BOSTON, MA 02114
BOSTON, MA 02114
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Olga Sinyavskaya's NPI number?
The NPI number for Olga Sinyavskaya is 1861052342. It was assigned to this individual provider in the NPPES registry on June 18, 2019.
Where is Olga Sinyavskaya located?
Olga Sinyavskaya practices at 55 Fruit St, Boston, MA 02114. The listed phone number is (617) 726-2000.
What is Olga Sinyavskaya's specialty?
The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Child & Adolescent Psychiatry, with taxonomy code 2084P0804X.
Is Olga Sinyavskaya enrolled in Medicare?
Yes. Olga Sinyavskaya is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Olga Sinyavskaya's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Olga Sinyavskaya reassigns Medicare benefits to 3 organizations: Massachusetts General Physicians Organization Inc (Boston, MA), The General Hospital Corporation (Boston, MA) and Cambridge Public Health Commission (Cambridge, MA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Olga Sinyavskaya's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Olga Sinyavskaya accept?
Health plans from Harvard Pilgrim Health Care, Taro Health and WellSense Health Plan list Olga Sinyavskaya as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Olga Sinyavskaya was last updated on June 24, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. Olga Sinyavskaya, MD · NPI 1861052342
Child & Adolescent Psychiatry physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since June 18, 2019.
## Identity
- **NPI:** 1861052342 (Entity type: Individual)
- **Enumerated:** June 18, 2019
- **Primary specialty:** Psychiatry & Neurology - Child & Adolescent Psychiatry · taxonomy 2084P0804X
- **State license:** 292756 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 55 FRUIT ST, Boston, MA 02114-2621
- **Phone:** (617) 726-2000
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): Massachusetts General Physicians Organization Inc (NPI 1801874573, Boston, MA); The General Hospital Corporation (NPI 1023049236, Boston, MA); Cambridge Public Health Commission (NPI 1306908405, Cambridge, MA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Chicago, Pritzker School Of Medicine, class of 2019
## Record status
- **NPPES last updated:** June 24, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1861052342) · Data from the CMS NPPES public registry.