Independent US Healthcare Provider Directory & Public Medical Database Patient Guides

Dr. Peter J Katz , MD

Dermatology • Appleton, WI

Active NPI 1477725141 Individual Practitioner Male Practitioner Accepts Medicare assignment
Practice location in NPPES

3935 N Lightning Dr
Appleton, WI 549136717

Call 9209681790 Location details and other listings
Medical Disclaimer

This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.

Practice Location & Contact Primary Location

Practice Address

3935 N Lightning Dr

Appleton, WI 549136717

Telephone 9209681790
Fax 9209681794
Organization at the Same NPPES Address or Phone
Forefront Dermatology, S.c. Facility NPI 1083768253

Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.

Other Listings in Public Data

NPPES lists 6 distinct additional practice-address records in Fond Du Lac, WI; Green Bay, WI; Kaukauna, WI and 3 more. See the list

Source: CMS NPPES NPI Registry, practice location records; release date unavailable.

CMS Doctors and Clinicians lists 1 group name: Forefront Dermatology Sc. See the list

Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.

Listings do not confirm current availability, employment or a shared ownership network.

Medicare Profile & Education

Source: CMS Doctors and Clinicians National Downloadable File

Medical School

Medical College Of Wisconsin

Graduation Year

2007

Medicare patients

519 people with Original Medicare in 2024

Different Original Medicare patients in 2024; counts below 11 are hidden; this does not show availability or quality.

Source: CMS, Medicare Physician & Other Practitioners – by Provider, 2024.

Medicare-allowed amount

About $206,342 in 2024

The total amount Medicare approved for these services in 2024. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.

What this does not show: Medicare-allowed amount

This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.

Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024.

Paid by Medicare

About $153,206 in 2024

The part of the Medicare-allowed amount that Medicare itself paid in 2024, after patients' deductibles and coinsurance.

What this does not show: Paid by Medicare

This is not the clinician's income and not a measure of quality.

Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024.

30-day fills

1,493 standardized 30-day fills in 2024

CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.

What this does not show: 30-day fills

It is not a count of patients and not a measure of quality.

Part D drug cost

$452,752 in 2024

The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.

What this does not show: Part D drug cost

A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.

Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024.

Open Payments general payments, program year 2025

All general payments: $1,309.07 across 52 records.

By nature of payment

  • Food and Beverage: $1,304.07 across 51 records.
  • Education: $5.00 across 1 record.

Reporting-company totals (3 largest of 14)

  • Janssen Pharmaceuticals, Inc: $243.70 across 6 records.
  • Regeneron Pharmaceuticals, Inc.: $232.41 across 9 records.
  • ABBVIE INC.: $186.67 across 10 records.

A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.

See the full table

Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2025 (published June 30, 2026).

Guide: How to read an Open Payments record

Years since graduation

19 years (graduated 2007)

CMS Doctors and Clinicians data list 2007 as the year this clinician finished professional school.

What this does not show: Years since graduation

It is not the number of years in practice, and more years does not mean better care.

Source: CMS Doctors and Clinicians National Downloadable File.

NPI first issued

2008

The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.

What this does not show: NPI first issued

NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.

Source: CMS NPPES NPI Registry.

Accepts Medicare assignment

CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.

Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.

Source: CMS Doctors and Clinicians; Medicare.gov, “Does your provider accept Medicare as full payment?”

Guide: What Medicare assignment means

No telehealth indicator

CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.

Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.

Guide: How Medicare covers telehealth

Enrolled in Medicare (PECOS)

Dr. Katz has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.

It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.

Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.

Guide: What Medicare enrollment (PECOS) means

Can order Medicare-covered services

CMS lists Dr. Katz as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.

What this does not show: Can order Medicare-covered services

It does not mean the clinician offers these services directly.

Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.

Guide: What ordering and referring status means

Compared with the same specialty in Appleton and Wisconsin

Billing and prescribing volume is not a quality rating.

Medicare Part B services

More Medicare Part B services than 65% of clinicians listed under Dermatology in Wisconsin (2024, 214 clinicians with data). Median for this group: 1,785. Middle half: 928 to 2,890.

Too few clinicians listed under Dermatology in Appleton have Medicare Part B data for 2024 to compare.

Medicare-allowed amount

A higher Medicare-allowed amount than 75% of clinicians listed under Dermatology in Wisconsin (2024, 214 clinicians with data). Median for this group: $105,054. Middle half: $63,154 to $179,949.

Too few clinicians listed under Dermatology in Appleton have Medicare Part B data for 2024 to compare.

Paid by Medicare

A higher Medicare payment amount than 80% of clinicians listed under Dermatology in Wisconsin (2024, 214 clinicians with data). Median for this group: $71,909. Middle half: $43,499 to $124,639.

Too few clinicians listed under Dermatology in Appleton have Medicare Part B data for 2024 to compare.

Medicare Part D prescriptions

More Part D prescriptions than 75% of clinicians listed under Dermatology in Wisconsin (2024, 231 clinicians with data). Median for this group: 668. Middle half: 250 to 1,042.

Too few clinicians listed under Dermatology in Appleton have Medicare Part D data for 2024 to compare.

Part D drug cost

A higher Part D drug cost than 75% of clinicians listed under Dermatology in Wisconsin (2024, 231 clinicians with data). Median for this group: $169,477. Middle half: $12,766 to $432,409.

Too few clinicians listed under Dermatology in Appleton have Medicare Part D data for 2024 to compare.

5 active clinicians are listed under Dermatology with a practice address in Appleton, WI (325 in Wisconsin).

Addresses are self-reported to NPPES and may be out of date.

Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.

Text: T-MedInfo · Report an error.

Pharma & Medical Device Financial Disclosures

Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments

Open Payments · Program Year 2025
Disclosure Year:

Program year 2025 (payments made January 1 – December 31, 2025): 52 records totaling $1,309.07.

Manufacturer Payment Nature Product Type Amount ($)
Janssen Pharmaceuticals, Inc
Food and Beverage
In-kind items and services
TREMFYA General $142.16
Galderma Laboratories, L.P.
Food and Beverage
In-kind items and services
NEMLUVIO General $70.49
Regeneron Pharmaceuticals, Inc.
Food and Beverage
In-kind items and services
DUPIXENT General $35.83
Regeneron Pharmaceuticals, Inc.
Food and Beverage
In-kind items and services
DUPIXENT General $35.58
Janssen Pharmaceuticals, Inc
Food and Beverage
In-kind items and services
TREMFYA General $34.14
UCB, Inc.
Food and Beverage
In-kind items and services
Bimzelx General $33.76
LEO Pharma Inc.
Food and Beverage
In-kind items and services
ADBRY General $33.50
Regeneron Pharmaceuticals, Inc.
Food and Beverage
In-kind items and services
DUPIXENT General $32.89
Pfizer Inc.
Food and Beverage
In-kind items and services
EUCRISA General $32.33
Regeneron Pharmaceuticals, Inc.
Food and Beverage
In-kind items and services
DUPIXENT General $32.27
Regeneron Pharmaceuticals, Inc.
Food and Beverage
In-kind items and services
DUPIXENT General $32.24
ABBVIE INC.
Food and Beverage
In-kind items and services
RINVOQ General $29.99
UCB, Inc.
Food and Beverage
In-kind items and services
Bimzelx General $29.80
Novartis Pharmaceuticals Corporation
Food and Beverage
In-kind items and services
COSENTYX General $29.44
Regeneron Pharmaceuticals, Inc.
Food and Beverage
In-kind items and services
DUPIXENT General $28.44
LEO Pharma Inc.
Food and Beverage
In-kind items and services
ADBRY General $28.12
ABBVIE INC.
Food and Beverage
In-kind items and services
SKYRIZI General $27.89
Eli Lilly and Company
Food and Beverage
In-kind items and services
TALTZ General $26.13
Novartis Pharmaceuticals Corporation
Food and Beverage
In-kind items and services
COSENTYX General $25.02
SUN PHARMACEUTICAL INDUSTRIES INC.
Food and Beverage
In-kind items and services
BLU-U General $24.96
UCB, Inc.
Food and Beverage
In-kind items and services
Bimzelx General $24.62
Janssen Pharmaceuticals, Inc
Food and Beverage
In-kind items and services
TREMFYA General $23.18
ABBVIE INC.
Food and Beverage
In-kind items and services
BOTOX General $22.57
Amgen Inc.
Food and Beverage
In-kind items and services
OTEZLA General $22.12
UCB, Inc.
Food and Beverage
In-kind items and services
Bimzelx General $21.96

(top 25 shown)

Source: CMS Open Payments, program year 2025, released June 30, 2026.

Performed Procedures & Service Volume

Services billed to Original Medicare Part B in 2024.

CMS Part B · Data Year 2024
Reporting Year:

CPT® is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016–2023 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners – by Provider and Service data, 2017–2024; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.

HCPCS Code Services Patients Submitted Charge Medicare Allowed
17003 Destruction of precancer skin growth, 2-14 growths
642 132 $84.00 $6.70
99213 Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
449 327 $263.00 $89.78
17000 Destruction of precancer skin growth, 1 growth
279 200 $303.63 $54.37
96910 Therapy procedure using ultraviolet radiation with tar or petroleum jelly application
221 17 $340.00 $117.92
11102 Biopsy of related skin growth, first growth
140 113 $378.00 $92.37
12032 Intermediate repair of wound of scalp, underarms, trunk, arms, or legs, 2.6-7.5 cm
129 116 $1002.00 $297.52
11602 Removal of cancer skin growth of body, arms, or legs, 1.1-2.0 cm
107 85 $936.14 $122.89
17110 Destruction of skin growth, 1-14 growths
59 54 $419.00 $110.73
11900 Injection into skin growth, 1-7 growths
49 19 $201.78 $49.38
11103 Biopsy of related skin growth, each additional growth
45 29 $205.00 $49.94
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more
42 40 $147.53 $56.05
11603 Removal of cancer skin growth of body, arms, or legs, 2.1-3.0 cm
40 35 $1062.15 $155.31
J3301 Injection, triamcinolone acetonide, not otherwise specified, 10 mg
40 17 $16.33 $0.95
11402 Removal of noncancer skin growth of body, arms, or legs, 1.1-2.0 cm
31 29 $617.67 $88.20
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
23 22 $372.00 $127.05
11104 Punch biopsy, first skin growth
22 20 $475.00 $118.06
96567 Application of light to destroy precancer skin growth
20 17 $495.00 $135.67
J7308 Aminolevulinic acid hcl for topical administration, 20%, single unit dosage form (354 mg)
20 17 $465.28 $388.97
36415 Insertion of needle into vein for collection of blood sample
19 12 $33.41 $8.65
12034 Intermediate repair of wound of scalp, underarms, trunk, arms, or legs, 7.6-12.5 cm
18 18 $941.00 $321.42
99211 Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional
18 18 $100.41 $23.21
12042 Intermediate repair of wound of neck, hands, feet, or genitals, 2.6-7.5 cm
16 16 $920.09 $297.10
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more
16 16 $321.00 $108.66
11622 Removal of cancer skin growth of scalp, neck, hands, feet, or genitals, 1.1-2.0 cm
15 13 $1121.40 $125.28
12031 Intermediate repair of wound of scalp, underarms, trunk, arms, or legs, 2.5 cm or less
11 11 $671.43 $249.92

Source: CMS Part B by Provider and Service, 2024; services under 11 beneficiaries omitted by CMS. Privacy limits

Submitted charges are billed amounts, not a price quote for your visit.

Medicare Part D Prescribing Profile & Medications

Medicare Part D prescriptions filled, including refills, in 2024.

CMS Part D · Data Year 2024
Prescription Year:
Brand Name Generic Name Prescriptions Day Supply Total Cost Patients
Ketoconazole Ketoconazole 137 3,676 $2,477.66 80
Clobetasol Propionate Clobetasol Propionate 133 3,378 $4,213.34 82
Triamcinolone Acetonide Triamcinolone Acetonide 127 3,783 $1,063.63 81
Fluorouracil Fluorouracil 74 2,093 $6,586.31 64
Methotrexate Methotrexate Sodium 63 3,024 $832.86 18
Hydroxychloroquine Sulfate Hydroxychloroquine Sulfate 56 3,482 $1,686.83 12
Doxycycline Monohydrate Doxycycline Monohydrate 56 2,503 $2,148.30 25
Doxycycline Hyclate Doxycycline Hyclate 55 2,125 $1,307.02 12
Minoxidil Minoxidil 55 3,740 $469.28 16
Mupirocin Mupirocin 42 666 $331.90 34
Cephalexin Cephalexin 37 283 $259.71 34
Tacrolimus Tacrolimus 35 932 $6,875.12 19
Prednisone Prednisone 32 1,456 $216.18 13
Metronidazole Metronidazole 31 956 $1,789.11 19
Folic Acid Folic Acid 28 1,183 $96.21 —
Otezla Apremilast 24 720 $112,998.58 —
Enbrel Sureclick Etanercept 18 504 $148,851.46 —
Dupixent Syringe Dupilumab 17 476 $74,557.01 —
Finasteride Finasteride 16 757 $122.15 —
Hydrocortisone Hydrocortisone 16 363 $82.19 13
Mycophenolate Mofetil Mycophenolate Mofetil 16 664 $960.39 —
Pregabalin Pregabalin 16 426 $114.06 —
Clindamycin Phosphate Clindamycin Phosphate 14 530 $630.37 —
Xolair Omalizumab 14 402 $39,062.17 —
Pentoxifylline Pentoxifylline 13 870 $328.02 —

(top 25 shown)

Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits

Specialties & License Numbers Reported to NPPES

Self-certified to NPPES: 2023-10-30
Dermatology Primary Specialty

NUCC Taxonomy Code: 207N00000X

License # reported to NPPES WI 53184-20

A dermatologist is trained to diagnose and treat pediatric and adult patients with benign and malignant disorders of the skin, mouth, external genitalia, hair and nails, as well as a number of sexually transmitted diseases. The dermatologist has had additional training and experience in the diagnosis and treatment of skin cancers, melanomas, moles and other tumors of the skin, the management of contact dermatitis and other allergic and nonallergic skin disorders, and in the recognition of the skin manifestations of systemic (including internal malignancy) and infectious diseases. Dermatologists have special training in dermatopathology and in the surgical techniques used in dermatology. They also have expertise in the management of cosmetic disorders of the skin such as hair loss and scars and the skin changes associated with aging.

Check License Status with the State Board License numbers are self-reported to NPPES; T-MedInfo does not confirm them against state records. Current status: Wisconsin Department of Safety and Professional Services.
Look Up on State Board Site

Medicare (PECOS) Enrollment & Ordering Eligibility

Source: CMS PECOS
Medicare FFS Enrollment Status Medicare Enrollment on File
CMS Provider Specialty

PRACTITIONER - DERMATOLOGY

Medicare Enrollment ID

I20101019001606

Enrollment State Jurisdiction

WI

PECOS Control ID

7113110453

Medicare Order & Referring Eligibility
Clinical Lab & Imaging (Part B) Eligible
Durable Medical Equipment (DME) Eligible
Home Health Agency (HHA) Eligible
Power Mobility Devices (PMD) Eligible

Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.

Medicare Group Practice Enrollments

Source: CMS Doctors and Clinicians National Downloadable File

Forefront Dermatology Sc

3935 N Lightning Dr, Appleton, WI 549136717

Phone: 9209681790

Secondary Practice Locations

2700 Crooks Ave Ste 101

Kaukauna, WI 541303900

Phone: 9205815561

1620 N Shawano St Ste C

New London, WI 549619318

Phone: 9209823870

111 Wisconsin American Dr

Fond Du Lac, WI 549376725

Phone: 9209230788

2806 Riverview Dr

Green Bay, WI 543136717

Phone: 9204987546

2351 State Road 44

Oshkosh, WI 549046333

Phone: 9206518855

W7713 Johnson Ct

Wautoma, WI 549825274

Phone: 9208951004

Clinicians Sharing This Practice Address or Phone

Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.

5 listed
NPI 1053806083

Physician Assistant (Certified), MPAS

NPI 1801802046

Doctor of Medicine (M.D.)

NPI 1972863389

Doctor of Medicine (M.D.)

NPI 1760047112

Doctor of Medicine (M.D.)

Dr. Brent Weed , MD

Dermatology - Dermatopathology

NPI 1104804038

Doctor of Medicine (M.D.)

Career & Practice History

NPI enumerated April 02, 2008.

No changes to the name, practice address, taxonomy or NPI status in this record have been observed in the monthly NPPES data files from January 2017 to August 2026.

No reviews have been published yet. Leave a review.

NPI Administrative Meta

NPI Number: 1477725141
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: April 02, 2008
Last Update: October 30, 2023
Sole Proprietor: No

Other Dermatology Specialists in Appleton

Healthcare providers in Appleton

Mailing Address

801 York St

Manitowoc, WI 542204630

Phone: 9206639008

About This Data NPPES fields (address, phone, specialty, license) are self-reported and may be outdated; Medicare fields follow the CMS dataset named in each section. Correct directly at NPPES.