What is Sabrina Witherby's specialty?

Sabrina Witherby (NPI 1881811008) is a Medicare-billing provider whose primary specialty is Hematology-Oncology in Providence, RI.

Where does Sabrina Witherby practice?

Sabrina Witherby practices in Providence, RI, based on the location reported in the CMS Medicare provider datasets for NPI 1881811008.

How much does Medicare pay Sabrina Witherby?

Sabrina Witherby (NPI 1881811008) received approximately $29K in total Medicare Part B payments, serving 193 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1881811008

Sabrina WitherbyM.D.

Hematology-OncologyProvidence, RII

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

212

Unique beneficiaries

—

Total services

309

Distinct HCPCS

Medicare payment

$23K

Peer benchmark

Total Medicare services vs. 46 Hematology-Oncology providers in RI — below median (cohort median 408).

PRESCRIBING · PART D · 2024

Total Rx claims

512

Beneficiaries

—

Total drug cost

$1.3M

Distinct drugs

Brand share

16.8%

Top prescribed drugs

Letrozole211 claims

Anastrozole70 claims

Dexamethasone53 claims

Abemaciclib38 claims

Ondansetron Hcl33 claims

QUALITY · MIPS · 2024

Final MIPS score

83.7

Quality

65.3

Cost

71.0

Improvement activities

40.0

Promoting interop.

100.0

Payment adjustment

0.37%

Group

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

No data available for this provider in 2025.

REFERRAL NETWORK

Where Sabrina Witherby'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). 11 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
MEMORIAL HOSPITAL	184	2,871
Aamir Ahmad Diagnostic Radiology · Fall River, MA	28	103
THE MIRIAM HOSPITAL	20	116
Alice Kim Cardiology · Halfmoon, NY	18	49
WOMEN & INFANTS HOSPITAL OF RHODE ISLAND	17	605
David Rowe Diagnostic Radiology · Warwick, RI	15	36
Christina Pinto Diagnostic Radiology · Providence, RI	15	49
Hemali Desai Diagnostic Radiology · Boston, MA	13	33
Christine Emmick General Surgery · Providence, RI	13	80
Ali Akhtar Internal Medicine · Providence, RI	11	53
Mazen Al-Qadi Pulmonary Disease · Pittsburgh, PA	11	47

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