What is William Cahill's specialty?

William Cahill (NPI 1366461048) is a Medicare-billing provider whose primary specialty is Interventional Pain Management in San Francisco, CA.

Where does William Cahill practice?

William Cahill practices in San Francisco, CA, based on the location reported in the CMS Medicare provider datasets for NPI 1366461048.

How much does Medicare pay William Cahill?

William Cahill (NPI 1366461048) received approximately $65K in total Medicare Part B payments, serving 175 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1366461048

William CahillMD

Interventional Pain ManagementSan Francisco, CAI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

248

Unique beneficiaries

—

Total services

744

Distinct HCPCS

Medicare payment

$64K

Peer benchmark

Total Medicare services vs. 118 Interventional Pain Management providers in CA — below median (cohort median 1,783).

PRESCRIBING · PART D · 2024

Total Rx claims

Beneficiaries

—

Total drug cost

$267

Distinct drugs

Brand share

0.0%

Top prescribed drugs

Atorvastatin Calcium24 claims

Amlodipine Besylate21 claims

Losartan Potassium12 claims

Gabapentin11 claims

QUALITY · MIPS · 2024

Final MIPS score

100.0

Quality

90.0

Cost

78.4

Improvement activities

40.0

Promoting interop.

100.0

Payment adjustment

1.05%

Group

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

No data available for this provider in 2025.

REFERRAL NETWORK

Where William Cahill'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). 23 inbound referrers · 35 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
Thomas Kaiser Cardiology · San Francisco, CA	39	208
CARPENTER, HOWARD	36	137
Derk Purcell Diagnostic Radiology · San Francisco, CA	34	147
MOON, KIRK	32	128
City & County Of San Francisco Ambulance Service Provider · San Francisco, CA	30	152
RICHEY, LUTHER	29	183
Lily Park Dermatology · Modesto, CA	28	179
Stephen Ng Physical Medicine and Rehabilitation · San Francisco, CA	25	188
David Knapp Internal Medicine · San Francisco, CA	24	494
Christopher Brown Pulmonary Disease · San Francisco, CA	23	155
Myron Marx Diagnostic Radiology · San Francisco, CA	23	74
Ovidiu Dumitrescu Internal Medicine · San Francisco, CA	22	115

Refers patients to

Outbound — where patients go next

Physician	Patients	Visits
SUTTER BAY HOSPITALS	102	238
Protransport 1 Ambulance Service Provider · Rohnert Park, CA	44	167
Thomas Kaiser Cardiology · San Francisco, CA	39	140
SUTTER BAY HOSPITALS	38	118
David Knapp Internal Medicine · San Francisco, CA	33	420
Jerome Barakos Diagnostic Radiology · San Francisco, CA	33	115
William Harvey Diagnostic Radiology · San Francisco, CA	32	77
OSHITA, ALLEN	32	96
SUTTER BAY HOSPITALS	31	166
Duc-Uy Quang-Dang Internal Medicine · San Francisco, CA	28	178
SUTTER VISITING NURSE ASSOCIATION AND HOSPICE	27	76
Cleon Yee Internal Medicine · San Francisco, CA	26	171

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