PROVIDER PROFILE · NPI 1962486332

Mark SingerM.D.

Internal MedicineNapa, CAI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

537

Unique beneficiaries

—

Total services

1,103

Distinct HCPCS

Medicare payment

$109K

Peer benchmark

Total Medicare services vs. 10,499 Internal Medicine providers in CA — above median (cohort median 531).

PRESCRIBING · PART D · 2024

Total Rx claims

2,873

Beneficiaries

—

Total drug cost

$184K

Distinct drugs

Brand share

23.3%

Top prescribed drugs

Levothyroxine Sodium220 claims

Apixaban171 claims

Atorvastatin Calcium142 claims

Gabapentin107 claims

Trazodone Hcl106 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024

No data available for this provider in 2024.

REFERRAL NETWORK

Where Mark Singer'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
ST. JOSEPH HEALTH NORTHERN CALIFORNIA, LLC	93	778
COLLABRIA CARE	28	245
GROTEN, DAWN	22	242
Edmund Schumacher Podiatry · Napa, CA	12	74
WESTERN HEALTH RESOURCES	12	83
Bruce Troup Diagnostic Radiology · Napa, CA	11	41

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