caretrace.iopowered by▸healthparse
SearchCohort Builder
Tools▾
KOL FinderTerritoriesDrug Compare
AI Query
Browse▾
By stateBy specialty
Pricing
SearchCohort BuilderToolsKOL FinderTerritoriesDrug CompareAI QueryBrowseBy stateBy specialtyPricing
PROVIDER PROFILE · NPI 1003933326

William AschM.D., PH.D.

NephrologyNew Haven, CTI
CROSS-REFERENCE

Related data on other Healthparse brands

ProviderScore
OIG/SAM exclusion screening, sanctions history
© 2026 CareTrace
PricingContactPrivacyTerms
QUALITY · MIPS · 2024
Final MIPS score
87.4
Quality
77.4
Cost
74.3
Improvement activities
40.0
Promoting interop.
100.0
Payment adjustment
0.52%
Group
PRESCRIBING · PART D · 2024
Total Rx claims
1,553
Beneficiaries
—
Total drug cost
$87K
Distinct drugs
35
Brand share
11.3%
Top prescribed drugs
Prednisone256 claims
Amlodipine Besylate135 claims
Carvedilol118 claims
Tamsulosin Hcl88 claims
Sulfamethoxazole/Trimethoprim80 claims
FACILITY AFFILIATIONS

Hospital & Facility Affiliations (5)

CCN 070002
Hospital
CCN 070007
Hospital
CCN 070010
Hospital
CCN 070018
Hospital
CCN 070022
Hospital
MEDICARE UTILIZATION · PART B · 2024
Total beneficiaries
316
Unique beneficiaries
—
Total services
560
Distinct HCPCS
6
Medicare payment
$40K
Peer benchmark
Q1
Q2
Q3
Q4
Q5
Total Medicare services vs. 109 Nephrology providers in CT — below median (cohort median 1,019).
INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024
No data available for this provider in 2024.
REFERRAL NETWORK

Where William Asch'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). 38 inbound referrers · 59 outbound destinations.

Receives referrals from
Inbound — who sends patients here
PhysicianPatientsVisits
YALE NEW HAVEN HOSPITAL124373
Quest Diagnostics Llc
Clinical Laboratory · Wallingford, CT
108804
Margaret Bia
Internal Medicine · New Haven, CT
96672
Yale University
Clinical Laboratory · New Haven, CT
81352
Isaac Hall
Nephrology · Durango, CO
71334
Sanjay Kulkarni
General Surgery · New Haven, CT
44183
Peter Yoo
General Surgery · Hartford, CT
42232
David Mulligan
General Surgery · Seattle, WA
35195
American Medical Response Of Connecticut Incorporated
Ambulance Service Provider · New Haven, CT
3583
RODRIGUEZ-DAVALOS, MANUEL33172
Leslie Scoutt
Diagnostic Radiology · New Haven, CT
3294
Jonathan Kirsch
Diagnostic Radiology · New Haven, CT
32102
Refers patients to
Outbound — where patients go next
PhysicianPatientsVisits
YALE NEW HAVEN HOSPITAL3653,980
Richard Formica
Nephrology · New Haven, CT
2191,374
James Smith
Internal Medicine · New Haven, CT
141871
Margaret Bia
Internal Medicine · New Haven, CT
106710
Yale University
Clinical Laboratory · New Haven, CT
98353
Quest Diagnostics Llc
Clinical Laboratory · Wallingford, CT
91606
YALE NEW HAVEN HOSPITAL75231
Isaac Hall
Nephrology · Durango, CO
70370
Rachel Lampert
Clinical Cardiac Electrophysiology · New Haven, CT
46144
Sanjay Kulkarni
General Surgery · New Haven, CT
39190
Peter Yoo
General Surgery · Hartford, CT
38195
Lisa Fox
Nurse Practitioner · New Haven, CT
36122
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.