PROVIDER PROFILE · NPI 1891766994

John HammesM.D.

NephrologySan Diego, CAI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

832

Unique beneficiaries

—

Total services

2,257

Distinct HCPCS

Medicare payment

$232K

Peer benchmark

Total Medicare services vs. 985 Nephrology providers in CA — above median (cohort median 1,482).

PRESCRIBING · PART D · 2024

Total Rx claims

1,206

Beneficiaries

—

Total drug cost

$325K

Distinct drugs

Brand share

16.3%

Top prescribed drugs

Furosemide144 claims

Losartan Potassium88 claims

Sevelamer Carbonate69 claims

Atorvastatin Calcium59 claims

Chlorthalidone50 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024

Total received

$59

Payment records

By payment type

Food and Beverage$59

REFERRAL NETWORK

Where John Hammes'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). 72 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
Jason Davis Nephrology · San Diego, CA	147	1,496
SPECTRA LABORATORIES INC	84	407
Alfred Horowitz Diagnostic Radiology · Berkeley, CA	80	1,528
American Medical Response Ambulance Service, Inc. Ambulance Service Provider · San Diego, CA	59	524
SHARP MEMORIAL HOSPITAL	48	217
Unilab Corporation Clinical Laboratory · West Hills, CA	38	158
NPI 1386630937	38	387
SAN DIEGO MEDICAL SERVICES ENTERPRISE, LLC	36	128
John Johnson Diagnostic Radiology · San Diego, CA	35	163
David Riker Pulmonary Disease · San Diego, CA	34	139
SHARP CORONADO HOSPITAL AND HEALTHCARE CENTER	34	175
David Namazy Nephrology · San Diego, CA	34	111

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