PROVIDER PROFILE · NPI 1619040227

John RiordanMD

NephrologySan Francisco, CAI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

632

Unique beneficiaries

—

Total services

1,433

Distinct HCPCS

Medicare payment

$209K

Peer benchmark

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

PRESCRIBING · PART D · 2024

Total Rx claims

1,223

Beneficiaries

—

Total drug cost

$362K

Distinct drugs

Brand share

24.2%

Top prescribed drugs

Amlodipine Besylate148 claims

Losartan Potassium133 claims

Lisinopril76 claims

Dapagliflozin Propanediol75 claims

Empagliflozin71 claims

QUALITY · MIPS · 2024

Final MIPS score

96.3

Quality

80.8

Cost

73.6

Improvement activities

40.0

Promoting interop.

100.0

Payment adjustment

0.90%

Group

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024

No data available for this provider in 2024.

REFERRAL NETWORK

Where John Riordan'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). 41 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
Joshua Bernstein Nephrology · San Francisco, CA	63	261
CARPENTER, HOWARD	55	169
STEVENS, SUSAN	54	169
Ilyas Iliya Internal Medicine · San Francisco, CA	54	179
City & County Of San Francisco Ambulance Service Provider · San Francisco, CA	48	103
Derk Purcell Diagnostic Radiology · San Francisco, CA	46	98
Myron Marx Diagnostic Radiology · San Francisco, CA	37	128
NPI 1275567943	36	121
TOTAL RENAL CARE INC	34	567
Edward Baker Diagnostic Radiology · San Francisco, CA	32	74
Brian Bronzo Diagnostic Radiology · San Francisco, CA	31	101
Daniel Nathanson Vascular Surgery · San Francisco, CA	28	82

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