PROVIDER PROFILE · NPI 1710023692

John Lenahan

DermatologySan Francisco, CAI

MEDICARE UTILIZATION · PART B · 2024

No data available for this provider in 2024.

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 John Lenahan'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). 13 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
UCSF HEALTH COMMUNITY HOSPITALS	61	144
NPI 1447682380	33	177
SETON MEDICAL CENTER	29	81
Ka Kam Chan Internal Medicine · San Francisco, CA	23	132
ZISMAN, KATERINA	21	28
PINTER, MARK	18	38
Yong Liu Internal Medicine · San Francisco, CA	18	66
HILLHAVEN - MSC PARTNERSHIP	16	64
ADHAM ZOOBY	16	42
Gerald Murphy Internal Medicine · San Francisco, CA	15	58
Alexander Lee Ophthalmology · San Jose, CA	15	29
UCSF HEALTH COMMUNITY HOSPITALS	13	48

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