PROVIDER PROFILE · NPI 1861406316

Mark NorthfieldMD

Orthopedic SurgeryPetaluma, CAI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

800

Unique beneficiaries

—

Total services

5,218

Distinct HCPCS

Medicare payment

$65K

Peer benchmark

Total Medicare services vs. 1,921 Orthopedic Surgery providers in CA — top quintile (cohort median 1,100).

PRESCRIBING · PART D · 2024

Total Rx claims

188

Beneficiaries

—

Total drug cost

$2K

Distinct drugs

Brand share

68.1%

Top prescribed drugs

Hydrocodone/Acetaminophen90 claims

Oxycodone Hcl/Acetaminophen38 claims

Oxycodone Hcl26 claims

Celecoxib21 claims

Tramadol Hcl13 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 Northfield'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). 16 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
NORCAL HEALTHCONNECT LLC	143	612
NPI 1316037856	50	139
ST. JOSEPH HEALTH NORTHERN CALIFORNIA, LLC	42	102
John Mcgovern Diagnostic Radiology · Santa Rosa, CA	40	105
Rajina Ranadive Internal Medicine · Petaluma, CA	23	73
Tashfeen Ekram Diagnostic Radiology · Mchenry, IL	23	78
Paul Wasserstein Pathology · Greenbrae, CA	22	61
LOZANO, ALEXANDER	19	92
Rajesh Ranadive Internal Medicine · Petaluma, CA	19	45
Nurit Licht Family Practice · Novato, CA	19	172
Jay Goldberg Emergency Medicine · Sonoma, CA	17	68
Falck Northern California Corp. Ambulance Service Provider · Hayward, CA	17	29

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