What is Peter Chang's specialty?

Peter Chang (NPI 1801107859) is a Medicare-billing provider whose primary specialty is Ophthalmology in Waltham, MA.

Where does Peter Chang practice?

Peter Chang practices in Waltham, MA, based on the location reported in the CMS Medicare provider datasets for NPI 1801107859.

How much does Medicare pay Peter Chang?

Peter Chang (NPI 1801107859) received approximately $2.2M in total Medicare Part B payments, serving 1,024 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1801107859

Peter ChangM.D.

OphthalmologyWaltham, MAI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

3,883

Unique beneficiaries

—

Total services

32,526

Distinct HCPCS

Medicare payment

$1.9M

Peer benchmark

Total Medicare services vs. 558 Ophthalmology providers in MA — top quintile (cohort median 1,976).

PRESCRIBING · PART D · 2024

Total Rx claims

2,153

Beneficiaries

—

Total drug cost

$4.6M

Distinct drugs

Brand share

47.4%

Top prescribed drugs

Dorzolamide Hcl/Timolol Maleat171 claims

Prednisolone Acetate156 claims

Brimonidine Tartrate150 claims

Methotrexate Sodium133 claims

Timolol Maleate130 claims

QUALITY · MIPS · 2024

Final MIPS score

100.0

Quality

0.0

Cost

71.4

Improvement activities

40.0

Promoting interop.

100.0

Payment adjustment

1.05%

Group

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024

Total received

$204K

Payment records

215

By payment type

Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$153K

Honoraria$19K

Consulting Fee$12K

Travel and Lodging$12K

Food and Beverage$7K

Top paying entities

Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$153K

Honoraria$19K

Consulting Fee$12K

Travel and Lodging$12K

Food and Beverage$7K

REFERRAL NETWORK

Where Peter Chang'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). 4 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
FINDER, ANTHONY	33	38
Jennifer Lim Ophthalmology · Chicago, IL	19	64
William Mieler Ophthalmology · Burr Ridge, IL	17	90
Yannek Leiderman Ophthalmology · Chicago, IL	15	47

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