ITAMAR YAAKOV GNATT M.D
NPI 1447781992
Preventive Medicine - Undersea and Hyperbaric Medicine in Milwaukee, WI

Q: What is Itamar Gnatt's NPI number?

The NPI number for Itamar Gnatt is 1447781992. It was assigned to this individual provider in the NPPES registry on March 27, 2017.

Q: What is Itamar Gnatt's specialty?

The primary specialty registered for this NPI is Preventive Medicine, specializing in Undersea and Hyperbaric Medicine, with taxonomy code 2083P0011X.

Q: When was this NPI record last updated?

The NPPES record for Itamar Gnatt was last updated on October 3, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since March 27, 2017PECOS EnrolledAccepts Medicare Assignment

945 N 12TH ST, MILWAUKEE, WI 53233(414) 219-2000 Get Directions Write a Review

NPPES record last updated: October 3, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jan 3, 2025, Nov 12, 2024, Jul 22, 2024 and 4 more (7 updates tracked since 2017).

On this page

About Itamar Yaakov Gnatt M.d NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

ITAMAR YAAKOV GNATT M.D (NPI 1447781992) is an individual undersea and hyperbaric medicine provider in Milwaukee, Wisconsin, licensed in Wisconsin (70439) and active in the NPI registry since March 2017. He is enrolled in Medicare PECOS, is affiliated with Mountainview Hospital, and maintains a secondary practice location in Las Vegas.

NPPES Registry Identity

NPI1447781992

Entity TypeIndividualMale

Primary Taxonomy2083P0011X

Provider Legal NameITAMAR YAAKOV GNATTCredential: M.D

Location Address945 N 12TH STMilwaukee, WI 53233-1305

Mailing AddressPo Box 735044Chicago, IL 60673-5044 · (800) 326-2250

Phone(414) 219-2000

Sole ProprietorYes

Medical School CMSOtherGraduated 2017

Enumeration DateMarch 27, 2017

Last NPPES UpdateOctober 3, 20257 updates tracked since enumeration

NPPES CertifiedOctober 3, 2025

✔ NPI 1447781992 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyPreventive Medicine · Undersea and Hyperbaric MedicineAllopathic & Osteopathic Physicians

Taxonomy Code2083P0011X

Licenses✔ Licensed in WI · 70439✔ Licensed in NV · 26680

Definition

A specialist who treats decompression illness and diving accident cases and uses hyperbaric oxygen therapy to treat such conditions as carbon monoxide poisoning, gas gangrene, non-healing wounds, tissue damage from radiation and burns and bone infections. This specialist also serves as consultant to other physicians in all aspects of hyperbaric chamber operations and assesses risks and applies appropriate standards to prevent disease and disability in divers and other persons working in altered atmospheric conditions.

Also ListedEmergency Medicine · Undersea and Hyperbaric MedicineTaxonomy 207PE0005X · License 70439-20 (WI)

Also ListedFamily MedicineTaxonomy 207Q00000X · License 26680 (NV)

945 N 12TH ST, Milwaukee, WI 53233

Open in Google Maps ↗

Secondary Practice Location 1

Location 16070 S Fort Apache Rd Ste 100Las Vegas, NV 89148-5615 · Phone (702) 803-5534

Other Identifiers 1

Medicaid10005229WI

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Aspirus Health Plan, CareSource (Common Ground Healthcare), UnitedHealthcare.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Itamar Yaakov Gnatt M.d is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID8527306414

PECOS Enrollment IDI20210621002219

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency– Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show Itamar Gnatt reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Aurora Medical Group, Inc.

3.6 mi

Nurse Anesthetist, Certified Registered

3301 W FOREST HOME AVE
Milwaukee, WI 53215

Reassigned Medicare billing, Wisconsin enrollment
4,609 clinicians in this Medicare group

NPI 1427271378 (877) 576-3544

Lakeshore Medical Clinic, LLC

6.1 mi

Family Medicine

2000 E LAYTON AVE STE 100
Saint Francis, WI 53235

Reassigned Medicare billing, Wisconsin enrollment
960 clinicians in this Medicare group

NPI 1003861188 (414) 744-6589

Aurora Advanced Healthcare, Inc.

7.3 mi

Family Medicine

3003 W GOOD HOPE RD
Milwaukee, WI 53209

Reassigned Medicare billing, Wisconsin enrollment
1,615 clinicians in this Medicare group

NPI 1265629133 (414) 352-3100

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 5

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

135 services56 patients

Management of oxygen chamber therapy 99183

Oxygen chamber therapy involves breathing pure oxygen in a pressurized room or tube. It's used to treat various conditions like wounds that won't heal due to diabetes or radiation injury. In this therapy, your body's tissues get more oxygen to promote healing and fight infection.

99 services31 patients

Removal of tissue from wound, 20.0 sq cm or less 97597

This procedure involves the careful removal of damaged or infected tissue from a wound that's 20.0 square cm or less. It's done to promote healing and prevent further infection. The process is carried out under local anesthesia, ensuring minimal discomfort.

58 services36 patients

Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes 99221

Initial hospital inpatient care refers to the first day of your stay in the hospital. This service typically includes a 30-minute check-up with a healthcare professional. They'll assess your health, discuss your condition, and plan your treatment. It's part of ensuring you receive the best possible care.

40 services40 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

34 services29 patients

Hospital Affiliations CMS Care Compare 4

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Mountainview Hospital

Acute Care Hospitals · Las Vegas, NV

4/5 CMS rating

OwnershipProprietary

CMS Certification Number290039

Location3100 N Tenaya WayLas Vegas, NV 89128 · Clark County

Emergency services Birthing friendly

Aurora St Lukes Medical Center

Acute Care Hospitals · Milwaukee, WI

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number520138

Location2900 W Oklahoma AveMilwaukee, WI 53215 · Milwaukee County

Emergency services Birthing friendly

West Allis Memorial Hospital

Acute Care Hospitals · West Allis, WI

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number520139

Location8901 W Lincoln AveWest Allis, WI 53227 · Milwaukee County

Emergency services Birthing friendly

Aurora Medical Center

Acute Care Hospitals · Grafton, WI

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number520207

Location975 Port Washington RoadGrafton, WI 53024 · Ozaukee County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 53233 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$123.69 typical visit price

range $53.90 – $163.24

Typical copayment $30.92 (range $13.47 – $40.81)

Most-billed visit code 99204

Established Patient

$95.41 typical visit price

range $17.40 – $133.76

Typical copayment $23.85 (range $4.35 – $33.44)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

RICHARD COMPTON KURTZ II MD

Family Medicine

945 N 12TH ST
MILWAUKEE, WI 53233

Milwaukee County (414) 219-0000

MS. ANN M YOCKEY APNP

Nurse Practitioner

945 N 12TH ST
MILWAUKEE, WI 53233

Milwaukee County (414) 219-5800

DR. ALINA M WINANS MD

Emergency Medicine

945 N 12TH ST
MILWAUKEE, WI 53233

Milwaukee County (414) 219-2000

MS. MORANDA MARIA MEDINA-LOPEZ RN

Registered Nurse

945 N 12TH ST
MILWAUKEE, WI 53233

Milwaukee County (414) 219-2000

XENAYSHMA ZHAYLEENE GNAS-PACHECO

Registered Nurse (Registered Nurse First Assistant)

945 N 12TH ST
MILWAUKEE, WI 53233

Milwaukee County (414) 000-0000

PROGRESSIVE COMMUNITY HEALTH CENTERS, INC.

Clinic/Center (Federally Qualified Health Center (FQHC))

945 N 12TH ST, URGENT CARE
MILWAUKEE, WI 53233

Milwaukee County (414) 935-8000

JOSEPH SHAOUL

Anesthesiologist Assistant

945 N 12TH ST
MILWAUKEE, WI 53233

Milwaukee County (414) 219-2000

MICHELE DUDA

Nurse Practitioner

945 N 12TH ST
MILWAUKEE, WI 53233

Milwaukee County (414) 219-7021

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Itamar Gnatt's NPI number?

The NPI number for Itamar Gnatt is 1447781992. It was assigned to this individual provider in the NPPES registry on March 27, 2017.

Where is Itamar Gnatt located?

Itamar Gnatt practices at 945 N 12th St, Milwaukee, WI 53233. The listed phone number is (414) 219-2000.

What is Itamar Gnatt's specialty?

The primary specialty registered for this NPI is Preventive Medicine, specializing in Undersea and Hyperbaric Medicine, with taxonomy code 2083P0011X.

Is Itamar Gnatt enrolled in Medicare?

Yes. Itamar Gnatt is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Itamar Gnatt's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Itamar Gnatt reassigns Medicare benefits to 3 organizations: Aurora Medical Group, Inc. (Milwaukee, WI), Lakeshore Medical Clinic, LLC (Saint Francis, WI) and Aurora Advanced Healthcare, Inc. (Milwaukee, WI). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Itamar Gnatt's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Itamar Gnatt accept?

Health plans from Aspirus Health Plan, CareSource (Common Ground Healthcare) and UnitedHealthcare list Itamar Gnatt as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Itamar Gnatt affiliated with any hospitals?

According to CMS data, Itamar Gnatt is affiliated with Mountainview Hospital, Aurora St Lukes Medical Center, West Allis Memorial Hospital and Aurora Medical Center.

When was this NPI record last updated?

The NPPES record for Itamar Gnatt was last updated on October 3, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.