What is Mark Johnson's specialty?

Mark Johnson (NPI 1578670931) is a Medicare-billing provider whose primary specialty is Nephrology in Morristown, NJ.

Where does Mark Johnson practice?

Mark Johnson practices in Morristown, NJ, based on the location reported in the CMS Medicare provider datasets for NPI 1578670931.

How much does Medicare pay Mark Johnson?

Mark Johnson (NPI 1578670931) received approximately $182K in total Medicare Part B payments, serving 592 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1578670931

Mark JohnsonM.D.

PRACTICEORTHOSURG PCSee all providers at this practice →

NephrologyMorristown, NJI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

948

Unique beneficiaries

—

Total services

1,922

Distinct HCPCS

Medicare payment

$180K

Peer benchmark

Total Medicare services vs. 320 Nephrology providers in NJ — above median (cohort median 1,831).

PRESCRIBING · PART D · 2024

Total Rx claims

217

Beneficiaries

—

Total drug cost

$39K

Distinct drugs

Brand share

12.0%

Top prescribed drugs

Hydrochlorothiazide46 claims

Amlodipine Besylate37 claims

Tamsulosin Hcl34 claims

Calcitriol21 claims

Losartan Potassium20 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

Total received

$184

Payment records

By payment type

Food and Beverage$184

Top paying entities

Food and Beverage$184

REFERRAL NETWORK

Where Mark Johnson'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). 98 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
AHS HOSPITAL CORP.	443	1,065
Atlantic Ambulance Corp. Ambulance Service Provider · Livingston, NJ	134	328
David Paik Diagnostic Radiology · Parsippany, NJ	123	309
Hal Ginsberg Diagnostic Radiology · Morristown, NJ	85	199
NPI 1427148279	72	170
Mark Cosentino Diagnostic Radiology · Morristown, NJ	69	142
Peter Roytman Hospitalist · Morristown, NJ	67	146
Rolando Dominguez Mustafa Hospitalist · Lake City, FL	65	120
Thaddeus Yablonsky Diagnostic Radiology · Morristown, NJ	65	163
Miguel Carreno Internal Medicine · Morris Plains, NJ	62	151
Robyn Murphy Diagnostic Radiology · Morristown, NJ	58	106
Christine Gerges Internal Medicine · Morristown, NJ	55	96

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