What is Joshua Greenstein's specialty?

Joshua Greenstein (NPI 1104881457) is a Medicare-billing provider whose primary specialty is Nephrology in Escondido, CA.

Where does Joshua Greenstein practice?

Joshua Greenstein practices in Escondido, CA, based on the location reported in the CMS Medicare provider datasets for NPI 1104881457.

How much does Medicare pay Joshua Greenstein?

Joshua Greenstein (NPI 1104881457) received approximately $205K in total Medicare Part B payments, serving 473 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1104881457

Joshua GreensteinM.D.

NephrologyEscondido, CAI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

1,183

Unique beneficiaries

—

Total services

2,927

Distinct HCPCS

Medicare payment

$186K

Peer benchmark

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

PRESCRIBING · PART D · 2024

Total Rx claims

2,082

Beneficiaries

—

Total drug cost

$218K

Distinct drugs

Brand share

14.1%

Top prescribed drugs

Amlodipine Besylate179 claims

Furosemide100 claims

Lisinopril89 claims

Calcitriol76 claims

Atorvastatin Calcium73 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

No data available for this provider in 2025.

FACILITY AFFILIATIONS

Hospital & Facility Affiliations (5)

Dialysis facility

Dialysis facility

Dialysis facility

Hospital

Hospital

REFERRAL NETWORK

Where Joshua Greenstein'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). 52 inbound referrers · 92 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
PALOMAR HEALTH	195	690
NPI 1255335535	125	648
Mohammed Neyaz Nephrology · Escondido, CA	91	238
Kiran Patel Diagnostic Radiology · Oceanside, CA	86	176
PALOMAR HEALTH	74	280
SAN MARCOS DIALYSIS LLC	71	231
NPI 1245331230	53	118
Jeffrey Miller Diagnostic Radiology · Oceanside, CA	47	114
NPI 1063473429	42	77
Tan Nguyen Diagnostic Radiology · Dallas, TX	41	92
William Kakimoto Diagnostic Radiology · La Jolla, CA	37	76
Michael Noud Diagnostic Radiology · Oceanside, CA	35	64

Refers patients to

Outbound — where patients go next

Physician	Patients	Visits
PALOMAR HEALTH	172	736
Laboratory Corporation Of America Clinical Laboratory · San Diego, CA	141	524
Joseph Hebreo Nephrology · Escondido, CA	127	484
NPI 1255335535	125	636
Mark Shapiro Internal Medicine · Escondido, CA	112	492
Osman Khawar Nephrology · Escondido, CA	109	409
Mohammed Neyaz Nephrology · Escondido, CA	88	249
SAN MARCOS DIALYSIS LLC	68	376
DVA RENAL HEALTHCARE INC	66	709
Kiran Patel Diagnostic Radiology · Oceanside, CA	65	158
DOVES DIALYSIS LLC	65	517
Jeremy Stupin Diagnostic Radiology · Escondido, CA	63	161

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