What is David Grambow's specialty?

David Grambow (NPI 1235178674) is a Medicare-billing provider whose primary specialty is Interventional Cardiology in Milwaukee, WI.

Where does David Grambow practice?

David Grambow practices in Milwaukee, WI, based on the location reported in the CMS Medicare provider datasets for NPI 1235178674.

How much does Medicare pay David Grambow?

David Grambow (NPI 1235178674) received approximately $60K in total Medicare Part B payments, serving 1,008 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1235178674

David GrambowMD

Interventional CardiologyMilwaukee, WII

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

1,499

Unique beneficiaries

—

Total services

1,803

Distinct HCPCS

Medicare payment

$54K

Peer benchmark

Total Medicare services vs. 82 Interventional Cardiology providers in WI — below median (cohort median 1,961).

PRESCRIBING · PART D · 2024

Total Rx claims

7,242

Beneficiaries

—

Total drug cost

$1.6M

Distinct drugs

Brand share

25.9%

Top prescribed drugs

Rosuvastatin Calcium705 claims

Metoprolol Succinate635 claims

Ezetimibe493 claims

Atorvastatin Calcium450 claims

Spironolactone390 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

Total received

$14K

Payment records

By payment type

Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$12K

Travel and Lodging$2K

Food and Beverage$250

Top paying entities

Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$12K

Travel and Lodging$2K

Food and Beverage$250

FACILITY AFFILIATIONS

Hospital & Facility Affiliations (5)

Hospital

Hospital

Hospital

Hospital

Hospital

REFERRAL NETWORK

Where David Grambow'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). 62 inbound referrers · 137 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
COLUMBIA ST MARY'S HOSPITAL OZAUKEE, INC.	119	262
Benjamin Broghammer Diagnostic Radiology · Mequon, WI	114	183
Bell Ambulance, Inc. Ambulance Service Provider · Milwaukee, WI	70	148
Nguyen Phan Clinical Cardiac Electrophysiology · Milwaukee, WI	65	139
Robert Roth Interventional Cardiology · Milwaukee, WI	63	136
Melish Thompson Internal Medicine · Scottsdale, AZ	54	98
Eric Dorn Diagnostic Radiology · Mequon, WI	53	74
Debra Berridge Diagnostic Radiology · Mequon, WI	53	70
Jacqueline Jahnke Diagnostic Radiology · St Francis, WI	50	98
KIM, MITCHEL	50	84
Joshua Liberman Cardiology · Mequon, WI	45	118
FROEDTERT MEMORIAL LUTHERAN HOSPITAL, INC.	42	88

Refers patients to

Outbound — where patients go next

Physician	Patients	Visits
COLUMBIA ST. MARY'S HOSPITAL MILWAUKEE, INC.	765	3,691
COLUMBIA ST MARY'S HOSPITAL OZAUKEE, INC.	214	429
KIM, MITCHEL	99	163
HUXLEY, ROBERT	84	187
Vladimir Ivanovic Diagnostic Radiology · Milwaukee, WI	78	121
A2cl Services, Llc Clinical Laboratory · West Allis, WI	71	206
Jacqueline Jahnke Diagnostic Radiology · St Francis, WI	66	126
ACETO, JAMES	64	92
Robert Roth Interventional Cardiology · Milwaukee, WI	61	172
JARENWATTANANON, APICHAI	61	129
AURORA HEALTH CARE METRO, INC.	61	218
Benjamin Broghammer Diagnostic Radiology · Mequon, WI	59	82

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