What is Mary Feng's specialty?

Mary Feng (NPI 1720106693) is a Medicare-billing provider whose primary specialty is Radiation Oncology in San Francisco, CA.

Where does Mary Feng practice?

Mary Feng practices in San Francisco, CA, based on the location reported in the CMS Medicare provider datasets for NPI 1720106693.

How much does Medicare pay Mary Feng?

Mary Feng (NPI 1720106693) received approximately $56K in total Medicare Part B payments, serving 70 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1720106693

Mary FengM.D.

Radiation OncologySan Francisco, CAI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

252

Unique beneficiaries

—

Total services

428

Distinct HCPCS

Medicare payment

$46K

Peer benchmark

Total Medicare services vs. 496 Radiation Oncology providers in CA — bottom quintile (cohort median 1,716).

PRESCRIBING · PART D · 2024

No data available for this provider in 2024.

QUALITY · MIPS · 2024

Final MIPS score

84.9

Quality

81.1

Cost

71.5

Improvement activities

40.0

Promoting interop.

0.0

Payment adjustment

0.42%

Group

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

No data available for this provider in 2025.

REFERRAL NETWORK

Where Mary Feng'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). 8 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
REGENTS OF THE UNIVERSITY OF MICHIGAN	165	2,408
FENG, FELIX	28	126
James Hayman Radiation Oncology · Ann Arbor, MI	21	108
EISBRUCH, AVRAHAM	19	83
REGENTS OF THE UNIVERSITY OF MICHIGAN	15	32
JAGSI, RESHMA	15	53
Aamer Chughtai Diagnostic Radiology · Ann Arbor, MI	11	27
PIERCE, LORI	11	24

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