AMY M MAASS APNP
NPI 1659857977
Nurse Practitioner in Neenah, WI

Q: What is Amy Maass's NPI number?

The NPI number for Amy Maass is 1659857977. It was assigned to this individual provider in the NPPES registry on July 19, 2018.

Q: What is Amy Maass's specialty?

The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.

Q: When was this NPI record last updated?

The NPPES record for Amy Maass was last updated on January 29, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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 July 19, 2018PECOS EnrolledAccepts Medicare Assignment

97.32/100

CMS Quality Rating

130 2ND ST, NEENAH, WI 54956(920) 729-2933(920) 727-4511 Get Directions Write a Review

NPPES record last updated: January 29, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Jan 29, 2026, Nov 24, 2021, Sep 10, 2020 and 3 more (6 updates tracked since 2018).

On this page

About Amy M Maass Apnp NPPES

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

AMY M MAASS APNP (NPI 1659857977) is an individual nurse practitioner in Neenah, Wisconsin, licensed in Wisconsin (8660-33) and active in the NPI registry since July 2018. She is enrolled in Medicare PECOS, is affiliated with Ascension Ne Wisconsin - St Elizabeth Campus, and is a graduate of Other (2018).

NPPES Registry Identity

NPI1659857977

Entity TypeIndividualFemale

Primary Taxonomy363L00000X

Provider Legal NameAMY M MAASSCredential: APNP

Location Address130 2ND STNeenah, WI 54956-2883

Mailing Address3 Neenah CtrNeenah, WI 54956-3070 · (920) 729-2933

Phone(920) 729-2933

Fax(920) 727-4511

Sole ProprietorNo

Medical School CMSOtherGraduated 2018

Enumeration DateJuly 19, 2018

Last NPPES UpdateJanuary 29, 20266 updates tracked since enumeration

NPPES CertifiedJanuary 29, 2026

✔ NPI 1659857977 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyNurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers

Taxonomy Code363L00000X

License✔ Licensed in WI · 8660-33

Definition

(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.

Also ListedNurse Practitioner · FamilyTaxonomy 363LF0000X · License 8660-33 (WI)

130 2ND ST, Neenah, WI 54956

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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield, CareSource (Common Ground Healthcare), Network Health and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Amy M Maass Apnp 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 ID7911251822

PECOS Enrollment IDI20181113000808

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.

Areas of Expertise CMS Part B claims 4

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.

488 services138 patients

Testing for presence of drug, by chemistry analyzers 80307

Chemistry analyzers are used to detect the presence of drugs in your system. This test involves taking a small sample of your blood or urine. The sample is then analyzed for specific substances. The results help in understanding your health condition better.

161 services87 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

101 services64 patients

Electronic analysis reprogramming and refill of spinal canal drug infusion pump by physician 62370

This procedure involves a physician checking and adjusting your spinal canal drug infusion pump. The pump's programming is updated electronically and the medication reservoir is refilled, ensuring effective pain management and optimal device performance.

39 services14 patients

Hospital Affiliations CMS Care Compare 3

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

Ascension NE Wisconsin - St Elizabeth Campus

Acute Care Hospitals · Appleton, WI

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number520009

Location1506 S Oneida StAppleton, WI 54915 · Outagamie County

Emergency services Birthing friendly

Thedacare Regional Med Ctr - Neenah

Acute Care Hospitals · Neenah, WI

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number520045

Location130 2nd StNeenah, WI 54956 · Winnebago County

Emergency services Birthing friendly

Thedacare Regional Medical Center - Appleton Inc

Acute Care Hospitals · Appleton, WI

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number520160

Location1818 N Meade StAppleton, WI 54911 · Outagamie County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 54956 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

$82.92 typical visit price

range $53.90 – $163.24

Typical copayment $20.73 (range $13.47 – $40.81)

Most-billed visit code 99203

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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

97.32/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored as part of a group practice

Quality

88.78

Improvement Activities

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.

JENNIFER MARIE KETTERHAGEN PHARMD

Pharmacist

130 2ND ST
NEENAH, WI 54956

Winnebago County (920) 454-5080

JAMES P MANDERLE MD

Nurse Anesthetist, Certified Registered

130 2ND ST, STE. A107
NEENAH, WI 54956

Winnebago County (920) 729-3332

ALLISON A HOELZEL OT

Occupational Therapist

130 2ND ST
NEENAH, WI 54956

Winnebago County (920) 729-2616

ELIZABETH BONSON PT

Physical Therapist

130 2ND ST
NEENAH, WI 54956

Winnebago County (920) 729-2155

SARAH M MARTIN

Physical Therapist

130 2ND ST
NEENAH, WI 54956

Winnebago County (920) 454-2973

JUSTIN EISBERNER

Nurse Anesthetist, Certified Registered

130 2ND ST
NEENAH, WI 54956

Winnebago County (920) 729-3100

DR. ERIK VERHAGE MD

Pediatrics (Neonatal-Perinatal Medicine)

130 2ND ST
NEENAH, WI 54956

Winnebago County (920) 969-7900

ALYSSA ANN ROTZENBERG

Physical Therapist

130 2ND ST
NEENAH, WI 54956

Winnebago County (920) 729-3100

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 Amy Maass's NPI number?

The NPI number for Amy Maass is 1659857977. It was assigned to this individual provider in the NPPES registry on July 19, 2018.

Where is Amy Maass located?

Amy Maass practices at 130 2nd St, Neenah, WI 54956. The listed phone number is (920) 729-2933.

What is Amy Maass's specialty?

The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.

Is Amy Maass enrolled in Medicare?

Yes. Amy Maass 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.

What insurance does Amy Maass accept?

Health plans from Anthem Blue Cross and Blue Shield, CareSource (Common Ground Healthcare), Network Health, Security Health Plan and UnitedHealthcare list Amy Maass 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 Amy Maass affiliated with any hospitals?

According to CMS data, Amy Maass is affiliated with Ascension NE Wisconsin - St Elizabeth Campus, Thedacare Regional Med Ctr - Neenah and Thedacare Regional Medical Center - Appleton Inc.

When was this NPI record last updated?

The NPPES record for Amy Maass was last updated on January 29, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.