What is Lewis Leng's specialty?

Lewis Leng (NPI 1508018508) is a Medicare-billing provider whose primary specialty is Neurosurgery in San Francisco, CA.

Where does Lewis Leng practice?

Lewis Leng practices in San Francisco, CA, based on the location reported in the CMS Medicare provider datasets for NPI 1508018508.

How much does Medicare pay Lewis Leng?

Lewis Leng (NPI 1508018508) received approximately $177K in total Medicare Part B payments, serving 363 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1508018508

Lewis LengM.D.

NeurosurgerySan Francisco, CAI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

459

Unique beneficiaries

—

Total services

503

Distinct HCPCS

Medicare payment

$65K

Peer benchmark

Total Medicare services vs. 497 Neurosurgery providers in CA — top quintile (cohort median 341).

PRESCRIBING · PART D · 2024

Total Rx claims

Beneficiaries

—

Total drug cost

$349

Distinct drugs

Brand share

0.0%

Top prescribed drugs

Meloxicam27 claims

Gabapentin23 claims

Baclofen14 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

Total received

$210

Payment records

By payment type

Food and Beverage$210

Top paying entities

Food and Beverage$210

REFERRAL NETWORK

Where Lewis Leng'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). 10 inbound referrers · 27 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
Derk Purcell Diagnostic Radiology · San Francisco, CA	35	90
CARPENTER, HOWARD	34	74
MOON, KIRK	25	57
Thomas Kaiser Cardiology · San Francisco, CA	24	45
RICHEY, LUTHER	20	68
City & County Of San Francisco Ambulance Service Provider · San Francisco, CA	17	29
Lily Park Dermatology · Modesto, CA	16	49
NPI 1275567943	13	34
Stefani Wedl Internal Medicine · Castro Valley, CA	12	41
Ovidiu Dumitrescu Internal Medicine · San Francisco, CA	11	28

Refers patients to

Outbound — where patients go next

Physician	Patients	Visits
SUTTER BAY HOSPITALS	137	460
Jerome Barakos Diagnostic Radiology · San Francisco, CA	55	147
SUTTER BAY HOSPITALS	53	147
OSHITA, ALLEN	40	110
Brian Andrews Neurosurgery · San Francisco, CA	36	101
William Harvey Diagnostic Radiology · San Francisco, CA	28	67
Maya Meux Diagnostic Radiology · San Francisco, CA	27	67
Amy Huang Diagnostic Radiology · San Francisco, CA	27	73
Protransport 1 Ambulance Service Provider · Rohnert Park, CA	26	64
Thomas Kaiser Cardiology · San Francisco, CA	25	75
CARPENTER, HOWARD	22	73
Laboratory Corporation Of America Clinical Laboratory · San Diego, CA	22	62

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