What is Sergei Tatishchev's specialty?

Sergei Tatishchev (NPI 1639317340) is a Medicare-billing provider whose primary specialty is Pathology in Los Angeles, CA.

Where does Sergei Tatishchev practice?

Sergei Tatishchev practices in Los Angeles, CA, based on the location reported in the CMS Medicare provider datasets for NPI 1639317340.

How much does Medicare pay Sergei Tatishchev?

Sergei Tatishchev (NPI 1639317340) received approximately $75K in total Medicare Part B payments, serving 685 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1639317340

Sergei TatishchevM.D.

PathologyLos Angeles, CAI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

954

Unique beneficiaries

—

Total services

2,437

Distinct HCPCS

Medicare payment

$74K

Peer benchmark

Total Medicare services vs. 1,209 Pathology providers in CA — above median (cohort median 1,423).

PRESCRIBING · PART D · 2024

No data available for this provider in 2024.

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

No data available for this provider in 2025.

REFERRAL NETWORK

Where Sergei Tatishchev's patients come from & go

Directional shared-patient flow from Medicare claims — who sends patients to this provider (inbound) and where this provider's patients go next (outbound). 30 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
DIGNITY COMMUNITY CARE	217	308
Kellie Curtis General Surgery · Northridge, CA	69	117
Unilab Corporation Clinical Laboratory · West Hills, CA	65	132
City Of Los Angeles Ambulance Service Provider · Los Angeles, CA	44	54
Somnath Basu Diagnostic Radiology · Riverside, CA	43	68
OLYMPIA HEALTH CARE LLC	32	46
Raluca Arimie Cardiology · West Hills, CA	29	40
HRONEK, IVAN	27	39
Leo Kassabian Cardiology · Encino, CA	26	50
BERMAN, GERALD	24	26
Path Md, Inc. Clinical Laboratory · Los Angeles, CA	22	23
Eric Montoya Physician Assistant · Woodland Hills, CA	21	30

Refers patients to

Outbound — where patients go next

No outbound pairs above the suppression threshold.

Source: CMS Physician Shared Patient Patterns (30-day window, Medicare FFS). Direction = a beneficiary seen by the first provider, then the second, within 30 days; a proxy for referral, not a documented referral. Pairs with fewer than 11 shared beneficiaries are suppressed.

CROSS-REFERENCE

Related data on other Healthparse brands

ProviderScore

OIG/SAM exclusion screening, sanctions history

Healthparse Signals

Monitor this provider for changes — dated NPI change events