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GREENBERGER WU DUNN & FIELDS, PLLC
NPI 1063863850
Internal Medicine - Pulmonary Disease in Royal Oak, MI

Active since June 23, 2016
30701 WOODWARD AVE STE 200, ROYAL OAK, MI 48073(248) 548-2114(248) 548-2135 Get Directions Write a Review

NPPES record last updated: September 12, 2024. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Sep 12, 2024, Nov 24, 2020, Nov 29, 2017 and 2 more (5 updates tracked since 2016).

About Greenberger Wu Dunn & Fields, Pllc NPPES

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

GREENBERGER WU DUNN & FIELDS, PLLC (NPI 1063863850), doing business as Oneill Greenberger Wu Dunn & Fields Pllc, is a healthcare organization registered as a pulmonary disease in Royal Oak, Michigan and active in the NPI registry since June 2016. The organization lists Lesley A Flood, Office Manager, as its authorized official.

NPPES Registry Identity

NPI1063863850
Entity TypeOrganization
Primary Taxonomy207RP1001X
Legal Business NameGREENBERGER WU DUNN & FIELDS, PLLC
Location Address30701 WOODWARD AVE STE 200Royal Oak, MI 48073-0990
Mailing Address30701 Woodward Ave Ste 200Royal Oak, MI 48073-0990 · (248) 548-2114 · Fax (248) 548-2135
Phone(248) 548-2114
Fax(248) 548-2135
Organization SubpartNo
Authorized OfficialLesley A FloodOffice Manager · (248) 548-2114
Enumeration DateJune 23, 2016
Last NPPES UpdateSeptember 12, 20245 updates tracked since enumeration
NPPES CertifiedSeptember 12, 2024
✔ NPI 1063863850 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Pulmonary DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RP1001X
Definition
An internist who treats diseases of the lungs and airways. The pulmonologist diagnoses and treats cancer, pneumonia, pleurisy, asthma, occupational and environmental diseases, bronchitis, sleep disorders, emphysema and other complex disorders of the lungs.
30701 WOODWARD AVE STE 200, Royal Oak, MI 48073
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Other Names 1

Former Legal Business NameOneill Greenberger Wu Dunn & Fields Pllc

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Buckeye Health Plan, Ambetter from Meridian, Ambetter Health and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Greenberger Wu Dunn & Fields, Pllc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

4

Medicare enrollment records show 4 clinicians reassign Medicare billing to Greenberger Wu Dunn & Fields, PLLC, which bills Medicare for the services they deliver. Of these, 4 practice at this address. They are listed nearest first.

Clinicians, nearest first (4)

Marc Dunn, M.D.
Pulmonary Disease
NPI 1427002484
30701 WOODWARD AVE STE 200
Royal Oak, MI 48073
(248) 548-2114
✔ PECOS✔ Accepts MedicareSame address
Warren Fields, M.D.
Pulmonary Disease
NPI 1225158694
30701 WOODWARD AVE STE 200
Royal Oak, MI 48073
(248) 548-2114
✔ PECOS✔ Accepts MedicareSame address
Marc Greenberger, M.D.
Pulmonary Disease
NPI 1831145747
30701 WOODWARD AVE STE 200
Royal Oak, MI 48073
(248) 548-2114
✔ PECOS✔ Accepts MedicareSame address
David Wu, M.D.
Pulmonary Disease
NPI 1740236652
30701 WOODWARD AVE STE 200
Royal Oak, MI 48073
(248) 548-2114
✔ PECOS✔ Accepts MedicareSame address

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

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 Greenberger Wu Dunn & Fields, PLLC's NPI number?

The NPI number for Greenberger Wu Dunn & Fields, PLLC is 1063863850. It was assigned to this organization in the NPPES registry on June 23, 2016. The provider was formerly known as Oneill Greenberger Wu Dunn & Fields PLLC.

Where is Greenberger Wu Dunn & Fields, PLLC located?

Greenberger Wu Dunn & Fields, PLLC is located at 30701 Woodward Ave Ste 200, Royal Oak, MI 48073. The listed phone number is (248) 548-2114.

What is Greenberger Wu Dunn & Fields, PLLC's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Pulmonary Disease, with taxonomy code 207RP1001X.

Is Greenberger Wu Dunn & Fields, PLLC enrolled in Medicare?

Yes. Greenberger Wu Dunn & Fields, PLLC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Greenberger Wu Dunn & Fields, PLLC?

According to the CMS Revalidation Reassignment List (October 2026 release), 4 clinicians, all in Pulmonary Disease, reassign their Medicare billing to Greenberger Wu Dunn & Fields, PLLC. A 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 the clinician's services. Of these, 4 practice at this address. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

What insurance does Greenberger Wu Dunn & Fields, PLLC accept?

Health plans from Ambetter Health, Ambetter from Buckeye Health Plan, Ambetter from Meridian, Blue Care Network of Michigan and Blue Cross Blue Shield of Michigan Mutual Insurance Company list Greenberger Wu Dunn & Fields, PLLC 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 Greenberger Wu Dunn & Fields, PLLC was last updated on September 12, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.