What is Nicholas Tzavalas's specialty?

Nicholas Tzavalas (NPI 1255319687) is a Medicare-billing provider whose primary specialty is Anesthesiology in Derry, NH.

Where does Nicholas Tzavalas practice?

Nicholas Tzavalas practices in Derry, NH, based on the location reported in the CMS Medicare provider datasets for NPI 1255319687.

How much does Medicare pay Nicholas Tzavalas?

Nicholas Tzavalas (NPI 1255319687) received approximately $13K in total Medicare Part B payments, serving 117 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1255319687

Nicholas TzavalasM.D.

PRACTICELAHEY CLINIC, INC.See all providers at this practice →

AnesthesiologyDerry, NHI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

Unique beneficiaries

—

Total services

Distinct HCPCS

Medicare payment

$8K

Peer benchmark

Total Medicare services vs. 223 Anesthesiology providers in NH — below median (cohort median 217).

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 Nicholas Tzavalas'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). 1 inbound referrers · 7 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
HCA HEALTH SERVICES OF NEW HAMPSHIRE INC	41	77

Refers patients to

Outbound — where patients go next

Physician	Patients	Visits
NPI 1255395042	60	100
Francis Lamy Ophthalmology · Londonderry, NH	27	120
HCA HEALTH SERVICES OF NEW HAMPSHIRE INC	19	43
Maurice Cohen Internal Medicine · Salem, NH	16	25
Liliane Yacoub Pathology · Methuen, MA	12	15
Banu Oner Diagnostic Radiology · Derry, NH	11	15
Action Ambulance Service Inc Ambulance Service Provider · Wilmington, MA	11	12

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