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JAMES P. MAZZULLA M.D.
NPI 1437144946
Internal Medicine in Milwaukee, WI

Active since September 12, 2005PECOS Enrolled
2500 W LAYTON AVE, SUITE 250, MILWAUKEE, WI 53221(414) 282-2006(414) 281-8704 Get Directions Write a Review

NPPES record last updated: November 20, 2008. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About James P. Mazzulla M.d. NPPES

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

JAMES P. MAZZULLA M.D. (NPI 1437144946) is an individual internal medicine provider in Milwaukee, Wisconsin, licensed in Wisconsin (20804) and active in the NPI registry since September 2005. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1437144946
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameJAMES P. MAZZULLACredential: M.D.
Location Address2500 W LAYTON AVE, SUITE 250Milwaukee, WI 53221-5420
Mailing AddressPo Box 689711Milwaukee, WI 53268-9711 · (414) 456-3100 · Fax (414) 456-3113
Phone(414) 282-2006
Fax(414) 281-8704
Sole ProprietorNo
Enumeration DateSeptember 12, 2005
Last NPPES UpdateNovember 20, 2008
✔ NPI 1437144946 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in WI · 20804
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
2500 W LAYTON AVE, Milwaukee, WI 53221
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Other Identifiers 5

Medicare UPINB54897WI
Medicare OSCAR/certification738400512WI
Medicaid30321000WI
Medicare OSCAR/certification684800469WI
Medicare ID-Type Unspecified0005-02475WI

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

James P. Mazzulla M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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 Reassignment

Medicare enrollment records show James Mazzulla reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Ascension Medical Group-Southeast Wisconsin Inc
7.7 mi
Anesthesiology
2301 N LAKE DR
Milwaukee, WI 53211
  • Reassigned Medicare billing, Wisconsin enrollment
  • 1,343 clinicians in this Medicare group
NPI 1194473066 (414) 585-1000

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 53221 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.

Referred Medical Equipment & Supplies CMS DME claims 5

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253
DME-Other DME · category DE017N
7 suppliers17 claims60 services$6.61 avg. paid by Medicare
Filter, disposable, used with positive airway pressure device A7038
DME-Other DME · category DE001N
4 suppliers12 claims72 services$1.35 avg. paid by Medicare
Hospital bed, semi-electric (head and foot adjustment), with any type side rails, with mattress E0260
DME-Hospital Beds · category DB000N
1 supplier12 claims12 services$40.91 avg. paid by Medicare
Nebulizer, with compressor E0570
DME-Other DME · category DE000N
1 supplier21 claims21 services$2.89 avg. paid by Medicare
Supply allowance for therapeutic continuous glucose monitor (cgm), includes all supplies and accessories, 1 month supply = 1 unit of service K0553
DME-Other DME · category DE017N
5 suppliers42 claims42 services$179.26 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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.

ASHA PUMPHREY PT
Physical Therapist
2500 W LAYTON AVE, SUITE 160
MILWAUKEE, WI 53221
Milwaukee County (414) 389-3023
DR. CONSTANCE M. GANAPES M.D.
Internal Medicine
2500 W LAYTON AVE, SUITE 250
MILWAUKEE, WI 53221
Milwaukee County (414) 282-2006
MICHELLE L. FERGUSON P.T.
Physical Therapist
2500 W LAYTON AVE, SUITE 160
MILWAUKEE, WI 53221
Milwaukee County (414) 817-5740
STEPHANIE M MCDONALD PT
Physical Therapist
2500 W LAYTON AVE, SUITE 160
MILWAUKEE, WI 53221
Milwaukee County (414) 389-3023
BENJAMIN J VOLZ PT
Physical Therapist
2500 W LAYTON AVE, SUITE 160
MILWAUKEE, WI 53221
Milwaukee County (414) 389-3023
ANDY J. FELD P.T.
Physical Therapist
2500 W LAYTON AVE, SUITE 160
MILWAUKEE, WI 53221
Milwaukee County (414) 817-5740
MH IMAGING - MKE 3T
Clinic/Center (Radiology)
2500 W LAYTON AVE
MILWAUKEE, WI 53221
Milwaukee County (262) 261-9423
DR. JEFFREY PHILLIP ROGERS M.D.
Internal Medicine (Cardiovascular Disease)
2500 W LAYTON AVE, SUITE 200
MILWAUKEE, WI 53221
Milwaukee County (414) 281-3444

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 James Mazzulla's NPI number?

The NPI number for James Mazzulla is 1437144946. It was assigned to this individual provider in the NPPES registry on September 12, 2005.

Where is James Mazzulla located?

James Mazzulla practices at 2500 W Layton Ave Suite 250, Milwaukee, WI 53221. The listed phone number is (414) 282-2006.

What is James Mazzulla's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is James Mazzulla enrolled in Medicare?

Yes. James Mazzulla is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for James Mazzulla's services?

According to the CMS Revalidation Reassignment List (October 2026 release), James Mazzulla reassigns Medicare benefits to Ascension Medical Group-Southeast Wisconsin Inc (Milwaukee, WI). The 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 James Mazzulla's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for James Mazzulla was last updated on November 20, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 years 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.