What is James Karlson's specialty?

James Karlson (NPI 1114915261) is a Medicare-billing provider whose primary specialty is Orthopedic Surgery in Cambridge, MA.

Where does James Karlson practice?

James Karlson practices in Cambridge, MA, based on the location reported in the CMS Medicare provider datasets for NPI 1114915261.

How much does Medicare pay James Karlson?

James Karlson (NPI 1114915261) received approximately $141K in total Medicare Part B payments, serving 477 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1114915261

James KarlsonMD

Orthopedic SurgeryCambridge, MAI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

1,083

Unique beneficiaries

—

Total services

5,190

Distinct HCPCS

Medicare payment

$121K

Peer benchmark

Total Medicare services vs. 531 Orthopedic Surgery providers in MA — top quintile (cohort median 1,092).

PRESCRIBING · PART D · 2024

Total Rx claims

Beneficiaries

—

Total drug cost

$334

Distinct drugs

Brand share

0.0%

Top prescribed drugs

Oxycodone Hcl70 claims

Tramadol Hcl28 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

Total received

$145

Payment records

By payment type

Food and Beverage$145

Top paying entities

Food and Beverage$145

FACILITY AFFILIATIONS

Hospital & Facility Affiliations (1)

CCN 220002

Hospital

REFERRAL NETWORK

Where James Karlson'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). 7 inbound referrers · 12 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
Quest Diagnostics Massachusetts Llc Clinical Laboratory · Marlborough, MA	17	29
Christina Linkiewicz Physician Assistant · Brighton, MA	17	41
Edward Marianacci Diagnostic Radiology · Cambridge, MA	15	42
Philip Rogoff Diagnostic Radiology · Cambridge, MA	14	23
Kyle Pond Cardiology · Cambridge, MA	14	26
Donald Romanelli Diagnostic Radiology · Cambridge, MA	12	25
DESILLIER, PAUL	12	30

Refers patients to

Outbound — where patients go next

Physician	Patients	Visits
MOUNT AUBURN HOSPITAL	155	633
DAVILA, DIEGO	48	113
Christina Linkiewicz Physician Assistant · Brighton, MA	20	66
Alejandro Heffess Diagnostic Radiology · Cambridge, MA	19	46
BETH ISRAEL DEACONESS MEDICAL CENTER, INC.	19	42
Jacques Sasson Diagnostic Radiology · Cambridge, MA	18	40
Kyle Pond Cardiology · Cambridge, MA	18	35
Siew Teoh Diagnostic Radiology · Burlington, MA	16	43
Ralph Reichle Diagnostic Radiology · Cambridge, MA	15	39
John Perry Pathology · Cambridge, MA	14	46
NPI 1710059670	13	22
Quest Diagnostics Massachusetts Llc Clinical Laboratory · Marlborough, MA	12	32

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