What is David Hartzok's specialty?

David Hartzok (NPI 1558374090) is a Medicare-billing provider whose primary specialty is Optometry in Chambersburg, PA.

Where does David Hartzok practice?

David Hartzok practices in Chambersburg, PA, based on the location reported in the CMS Medicare provider datasets for NPI 1558374090.

How much does Medicare pay David Hartzok?

David Hartzok (NPI 1558374090) received approximately $53K in total Medicare Part B payments, serving 418 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1558374090

David HartzokO.D.

OptometryChambersburg, PAI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

941

Unique beneficiaries

—

Total services

1,130

Distinct HCPCS

Medicare payment

$52K

Peer benchmark

Total Medicare services vs. 1,495 Optometry providers in PA — top quintile (cohort median 322).

PRESCRIBING · PART D · 2024

Total Rx claims

266

Beneficiaries

—

Total drug cost

$8K

Distinct drugs

Brand share

19.5%

Top prescribed drugs

Timolol Maleate108 claims

Latanoprost106 claims

Dorzolamide Hcl/Timolol Maleat37 claims

Brimonidine Tartrate/Timolol15 claims

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 David Hartzok'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). 5 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
V. Eugene Kilmore, Jr. Ophthalmology · Mechanicsburg, PA	20	58
HOLDAWAY, DIANE	16	33
Michael Husar Podiatry · Chambersburg, PA	15	25
Stephen Thuahnai Diagnostic Radiology · Chambersburg, PA	14	18
Betsie Figueroa-Cruz Cardiology · Chambersburg, PA	13	26

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