What is William Ko's specialty?

William Ko (NPI 1841230976) is a Medicare-billing provider whose primary specialty is Dermatology in Phoenix, AZ.

Where does William Ko practice?

William Ko practices in Phoenix, AZ, based on the location reported in the CMS Medicare provider datasets for NPI 1841230976.

How much does Medicare pay William Ko?

William Ko (NPI 1841230976) received approximately $653K in total Medicare Part B payments, serving 780 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1841230976

William KoM.D.

DermatologyPhoenix, AZI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

4,093

Unique beneficiaries

—

Total services

25,816

Distinct HCPCS

Medicare payment

$609K

Peer benchmark

Total Medicare services vs. 277 Dermatology providers in AZ — top quintile (cohort median 4,361).

PRESCRIBING · PART D · 2024

Total Rx claims

1,234

Beneficiaries

—

Total drug cost

$373K

Distinct drugs

Brand share

13.9%

Top prescribed drugs

Mupirocin484 claims

Ketoconazole115 claims

Valacyclovir Hcl84 claims

Fluticasone Propionate79 claims

Imiquimod67 claims

QUALITY · MIPS · 2024

Final MIPS score

83.5

Quality

82.3

Cost

76.8

Improvement activities

40.0

Promoting interop.

83.0

Payment adjustment

0.36%

Group

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

Total received

$3K

Payment records

151

By payment type

Food and Beverage$3K

Top paying entities

Food and Beverage$3K

REFERRAL NETWORK

Where William Ko'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). 6 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
John Ebner Dermatology · Phoenix, AZ	389	673
Richard Bernert Pathology · Scottsdale, AZ	23	42
FLORES, NICHOLAS	18	65
Tirsa Quartullo Nurse Practitioner · Phoenix, AZ	16	21
HONORHEALTH	15	30
MAYO CLINIC ARIZONA	13	25

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