What is John Hammes's specialty?

John Hammes (NPI 1891766994) is a Medicare-billing provider whose primary specialty is Nephrology in San Diego, CA.

Where does John Hammes practice?

John Hammes practices in San Diego, CA, based on the location reported in the CMS Medicare provider datasets for NPI 1891766994.

How much does Medicare pay John Hammes?

John Hammes (NPI 1891766994) received approximately $235K in total Medicare Part B payments, serving 432 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

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

Top paying entities

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