What is Mark Sullivan's specialty?

Mark Sullivan (NPI 1871673723) is a Medicare-billing provider whose primary specialty is Family Practice in Fairfield, CA.

Where does Mark Sullivan practice?

Mark Sullivan practices in Fairfield, CA, based on the location reported in the CMS Medicare provider datasets for NPI 1871673723.

How much does Medicare pay Mark Sullivan?

Mark Sullivan (NPI 1871673723) received approximately $174K in total Medicare Part B payments, serving 561 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1871673723

Mark SullivanM.D.

PRACTICESUTTER REGIONAL MEDICAL FOUNDATIONSee all providers at this practice →

Family PracticeFairfield, CAI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

1,380

Unique beneficiaries

—

Total services

2,334

Distinct HCPCS

Medicare payment

$167K

Peer benchmark

Total Medicare services vs. 8,228 Family Practice providers in CA — top quintile (cohort median 411).

PRESCRIBING · PART D · 2024

Total Rx claims

7,640

Beneficiaries

—

Total drug cost

$710K

Distinct drugs

125

Brand share

28.6%

Top prescribed drugs

Amlodipine Besylate458 claims

Atorvastatin Calcium442 claims

Rosuvastatin Calcium247 claims

Hydrocodone/Acetaminophen225 claims

Omeprazole206 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 Sullivan'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). 20 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
Aseem Rawal Diagnostic Radiology · Walnut Creek, CA	75	119
Edward Yoon Cardiology · San Pablo, CA	70	174
Keith Tao Diagnostic Radiology · Walnut Creek, CA	65	104
ANTON, STEVEN	46	108
Donna Hinman-Seabrooks Ophthalmology · Fairfield, CA	45	85
SUTTER VALLEY HOSPITALS	25	45
Robert Stein Emergency Medicine · San Rafael, CA	24	31
Lewis Weisblum Diagnostic Radiology · Fairfield, CA	23	56
Stephen Hesseltine Diagnostic Radiology · Walnut Creek, CA	20	28
Curt Osuga Physical Therapist in Private Practice · Fairfield, CA	20	74
Malalai Mojaddidi Optometry · Fairfield, CA	19	25
Yelena Krijanovski Hematology-Oncology · Fairfield, CA	19	83

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