What is Martha O'brien's specialty?

Martha O'brien (NPI 1356437081) is a Medicare-billing provider whose primary specialty is Certified Registered Nurse Anesthetist (CRNA) in Boston, MA.

Where does Martha O'brien practice?

Martha O'brien practices in Boston, MA, based on the location reported in the CMS Medicare provider datasets for NPI 1356437081.

How much does Medicare pay Martha O'brien?

Martha O'brien (NPI 1356437081) received approximately $8K in total Medicare Part B payments, serving 102 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1356437081

Martha O'brienCRNA

Certified Registered Nurse Anesthetist (CRNA)Boston, MAI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

Unique beneficiaries

—

Total services

Distinct HCPCS

Medicare payment

$3K

Peer benchmark

Total Medicare services vs. 1,019 Certified Registered Nurse Anesthetist (CRNA) providers in MA — below median (cohort median 159).

PRESCRIBING · PART D · 2024

No data available for this provider in 2024.

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 Martha O'brien'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). 5 inbound referrers · 15 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
Tom Hsu Ophthalmology · Boston, MA	51	87
Peter Rapoza Ophthalmology · Boston, MA	41	79
THE GENERAL HOSPITAL CORPORATION	24	35
DOLL, DAVID	19	19
Quest Diagnostics Massachusetts Llc Clinical Laboratory · Marlborough, MA	17	19

Refers patients to

Outbound — where patients go next

Physician	Patients	Visits
Boston Eye Surgery & Laser Center Trust Ambulatory Surgical Center · Waltham, MA	328	416
JOHNSON, MARK	132	147
COHEN, STEPHEN	114	144
HENDERSON, BONNIE	59	149
Michael Raizman Ophthalmology · Boston, MA	57	125
AMRHEIN, ROBERT	57	59
JAMISON, STEPHEN	42	42
Claudia Richter Ophthalmology · Boston, MA	36	79
Nicoletta Fynn-Thompson Ophthalmology · Boston, MA	30	51
Laura Fine Ophthalmology · Boston, MA	26	60
NEWTON-WELLESLEY HOSPITAL	19	32
VHS ACQUISITION SUBSIDIARY NUMBER 9 INC	14	16

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