PROVIDER PROFILE · NPI 1568402931

Anna ChangM.D.

PRACTICEJOHN MUIR PHYSICIAN NETWORKSee all providers at this practice →

EndocrinologyConcord, CAI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

1,137

Unique beneficiaries

—

Total services

4,475

Distinct HCPCS

Medicare payment

$158K

Peer benchmark

Total Medicare services vs. 633 Endocrinology providers in CA — top quintile (cohort median 1,164).

PRESCRIBING · PART D · 2024

Total Rx claims

2,686

Beneficiaries

—

Total drug cost

$1.3M

Distinct drugs

Brand share

49.4%

Top prescribed drugs

Levothyroxine Sodium426 claims

Metformin Hcl239 claims

Empagliflozin215 claims

Semaglutide185 claims

Tirzepatide126 claims

QUALITY · MIPS · 2024

Final MIPS score

90.3

Quality

89.5

Cost

74.3

Improvement activities

40.0

Promoting interop.

100.0

Payment adjustment

0.64%

Group

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024

Total received

$447

Payment records

By payment type

Food and Beverage$447

Top paying entities

Food and Beverage$447

REFERRAL NETWORK

Where Anna 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). 2 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
Colleen Kenney Podiatry · Concord, CA	15	25
Lindsay Chong Endocrinology · Concord, CA	15	32

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