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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MARY MOONEY GRETTENBERGER
NPI 1013520550
Social Worker - Clinical in Ira, MI

Active since August 25, 2020PECOS EnrolledAccepts Medicare Assignment
8811 VERNIER RD STE A, IRA, MI 48023(586) 307-4659(586) 500-9584 Get Directions Write a Review

NPPES record last updated: September 23, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Sep 23, 2026, Feb 3, 2023, Aug 25, 2020 (3 updates tracked since 2020).

About Mary Mooney Grettenberger NPPES

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

MARY MOONEY GRETTENBERGER (NPI 1013520550) is an individual clinical provider in Ira, Michigan, licensed in Michigan (6801115354) and active in the NPI registry since August 2020. She is enrolled in Medicare PECOS, maintains a secondary practice location in Ira, and is a graduate of Other (1995).

NPPES Registry Identity

NPI1013520550
Entity TypeIndividualFemale
Primary Taxonomy1041C0700X
Provider Legal NameMARY MOONEY GRETTENBERGER
Location Address8811 VERNIER RD STE AIra, MI 48023-2909
Mailing AddressPo Box 230244Fair Haven, MI 48023-0244 · (586) 307-4659 · Fax (586) 500-9584
Phone(586) 307-4659
Fax(586) 500-9584
Sole ProprietorNo
Medical School CMSOtherGraduated 1995
Enumeration DateAugust 25, 2020
Last NPPES UpdateSeptember 23, 20263 updates tracked since enumeration
NPPES CertifiedSeptember 23, 2026
✔ NPI 1013520550 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySocial Worker · ClinicalBehavioral Health & Social Service Providers
Taxonomy Code1041C0700X
License✔ Licensed in MI · 6801115354
Definition
A social worker who holds a master's or doctoral degree in social work from an accredited school of social work in addition to at least two years of post-master's supervised experience in a clinical setting. The social worker must be licensed, certified, or registered at the clinical level in the jurisdiction of practice. A clinical social worker provides direct services, including interventions focused on interpersonal interactions, intrapsychic dynamics, and life management issues. Clinical social work services are based on bio-psychosocial perspectives. Services consist of assessment, diagnosis, treatment (including psychotherapy and counseling), client-centered advocacy, consultation, evaluation, and prevention of mental illness, emotional, or behavioral disturbances.
8811 VERNIER RD STE A, Ira, MI 48023
Open in Google Maps ↗

Secondary Practice Location 1

Location 18811 Vernier Rd Ste AIra, MI 48023-2909 · Phone (586) 307-4659 · Fax (586) 500-9584

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Care Network of Michigan, Blue Cross Blue Shield of Michigan Mutual Insurance Company, Oscar Insurance Company 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

Mary Mooney Grettenberger 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 ID6406228451
PECOS Enrollment IDI20230221001380
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 Mary Grettenberger reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Dove Of Peace Christian Counseling PLLC
Same address
Mental Health
8811 VERNIER RD
Ira, MI 48023
  • Reassigned Medicare billing, Michigan enrollment
NPI 1225746969 (586) 307-4659

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 48023 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
$0.00 typical visit price
range $54.34 – $166.68
Typical copayment $0.00 (range $13.58 – $41.67)
Most-billed visit code NA
Established Patient
$68.07 typical visit price
range $17.09 – $135.40
Typical copayment $17.01 (range $4.27 – $33.85)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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 Mary Grettenberger's NPI number?

The NPI number for Mary Grettenberger is 1013520550. It was assigned to this individual provider in the NPPES registry on August 25, 2020.

Where is Mary Grettenberger located?

Mary Grettenberger practices at 8811 Vernier Rd Ste A, Ira, MI 48023. The listed phone number is (586) 307-4659.

What is Mary Grettenberger's specialty?

The primary specialty registered for this NPI is Social Worker, specializing in Clinical, with taxonomy code 1041C0700X.

Is Mary Grettenberger enrolled in Medicare?

Yes. Mary Grettenberger 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 Mary Grettenberger's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mary Grettenberger reassigns Medicare benefits to Dove Of Peace Christian Counseling PLLC (Ira, MI). 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 Mary Grettenberger's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Mary Grettenberger accept?

Health plans from Blue Care Network of Michigan, Blue Cross Blue Shield of Michigan Mutual Insurance Company, Oscar Insurance Company, Priority Health and UnitedHealthcare list Mary Grettenberger 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 Mary Grettenberger was last updated on September 23, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 35 days 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.