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MS. DENISE MAAS LMHC
NPI 1215923958
Counselor - Mental Health in Waterloo, IA

Active since September 27, 2005PECOS EnrolledAccepts Medicare Assignment
847 W 4TH ST, WATERLOO, IA 50702(319) 226-3220(319) 226-3220 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Ms. Denise Maas Lmhc NPPES

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

MS. DENISE MAAS LMHC (NPI 1215923958) is an individual mental health provider in Waterloo, Iowa, licensed in Iowa (00386) and active in the NPI registry since September 2005. She is enrolled in Medicare PECOS and is a graduate of Other (1997).

NPPES Registry Identity

NPI1215923958
Entity TypeIndividualFemale
Primary Taxonomy101YM0800X
Provider Legal NameMS. DENISE MAASCredential: LMHC
Location Address847 W 4TH STWaterloo, IA 50702-2141
Mailing Address847 W 4th StWaterloo, IA 50702-2141 · (319) 226-3220 · Fax (319) 226-3220
Phone(319) 226-3220
Fax(319) 226-3220
Sole ProprietorYes
Medical School CMSOtherGraduated 1997
Enumeration DateSeptember 27, 2005
Last NPPES UpdateJuly 8, 2007
✔ NPI 1215923958 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyCounselor · Mental HealthBehavioral Health & Social Service Providers
Taxonomy Code101YM0800X
License✔ Licensed in IA · 00386
847 W 4TH ST, Waterloo, IA 50702
Open in Google Maps ↗

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Oscar Health, Oscar Insurance Company, UnitedHealthcare and more.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

Ms. Denise Maas Lmhc 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 ID4183121627
PECOS Enrollment IDI20251009001889
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 Denise Maas reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Midwest Post Acute Care PLLC
244 mi
Nurse Practitioner
3000 N HALSTED ST STE 803
Chicago, IL 60657
  • Reassigned Medicare billing, Iowa enrollment
  • 41 clinicians in this Medicare group
NPI 1083012074 (888) 705-8722

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

Other Providers at the Same Location NPPES 5

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

CHRISTENSEN,CHRISTENSEN & FREESEMAN,PC
Dentist (Orthodontics and Dentofacial Orthopedics)
847 W 4TH ST
WATERLOO, IA 50702
Black Hawk County (319) 234-4486
DR. MICHAEL PAUL FREESEMAN DDS MS
Dentist (Orthodontics and Dentofacial Orthopedics)
847 W 4TH ST
WATERLOO, IA 50702
Black Hawk County (319) 234-4486
MR. JOHN R. CHURCH LMHC
Counselor (Mental Health)
847 W 4TH ST
WATERLOO, IA 50702
Black Hawk County (319) 215-8197
DR. GREGORY PAUL CHRISTENSEN DDS MS
Dentist (Orthodontics and Dentofacial Orthopedics)
847 W 4TH ST
WATERLOO, IA 50702
Black Hawk County (319) 234-4486
DR. ROGER A DAY DDS
Dentist (Pediatric Dentistry)
847 W 4TH ST
WATERLOO, IA 50702
Black Hawk County (319) 234-4486

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 Denise Maas's NPI number?

The NPI number for Denise Maas is 1215923958. It was assigned to this individual provider in the NPPES registry on September 27, 2005.

Where is Denise Maas located?

Denise Maas practices at 847 W 4th St, Waterloo, IA 50702. The listed phone number is (319) 226-3220.

What is Denise Maas's specialty?

The primary specialty registered for this NPI is Counselor, specializing in Mental Health, with taxonomy code 101YM0800X.

Is Denise Maas enrolled in Medicare?

Yes. Denise Maas 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 organization bills Medicare for Denise Maas's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Denise Maas reassigns Medicare benefits to Midwest Post Acute Care PLLC (Chicago, IL). 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 Denise Maas's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Denise Maas accept?

Health plans from Oscar Health, Oscar Insurance Company, UnitedHealthcare and Wellmark Health Plan of Iowa, Inc. list Denise Maas 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.

When was this NPI record last updated?

The NPPES record for Denise Maas was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.