NPPES file of Aug 9, 2026

Warren Bradley Fields, M.D.

Pulmonary Disease Physician · Royal Oak, MI

Warren Bradley Fields, M.D. is a pulmonary disease physician with a practice address in Royal Oak, Michigan, and NPI 1225158694, issued on Mar 30, 2007. Check the license (Michigan 4301076558, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1225158694
Name
Warren Bradley Fields
Credential
M.D.
Primary taxonomy
Pulmonary Disease Physician 207RP1001X
License numbers
4301076558 MI
036121035 IL
Self-reported in NPPES; status is on the state search
Practice location
30701 Woodward Ave Ste 200, Royal Oak, MI 48073
Phone
(248) 548-2114
Enumerated
Mar 30, 2007
Record last updated
Sep 12, 2024
Fax
(248) 548-2135
Medicaid ID
036121035 IL
Medicare enrollment
Enrolled (PECOS I20101207000930); accepts Medicare assignment
Medical or professional school
Indiana University School Of Medicine, 2000
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest pulmonary disease physician records → All 526 in Michigan → Look up another NPI →

Also registered at 30701 Woodward Ave Ste 200

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Marc Dunn, M.D.Pulmonary Disease Physician1427002484
  2. Marc Greenberger, M.D.Pulmonary Disease Physician1831145747
  3. Kelly Hope, RN, NPAcute Care Nurse Practitioner1003150392
  4. Peter Howell, LMSWClinical Social Worker1467893966
  5. Mary Nicoletti, LLMSWSocial Worker1316595135
  6. Daniel Rontal, MDOtolaryngology Physician1831152610

Verify Warren Bradley Fields in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
    Search for license 4301076558    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Michigan license search

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58% more Medicare Part D claims than the average pulmonary disease physician in 2024

2,248 Medicare Part D claims for 366 beneficiaries, against an average of 1,425 among the 11,596 providers of this specialty who prescribed in Part D.

  1. Warren Fields2,248
  2. Specialty average1,425

Most prescribed

  1. Albuterol Sulfate Hfa375 claims
  2. Trelegy Ellipta256 claims
  3. Prednisone241 claims
  4. Azelastine Hcl98 claims
  5. Spiriva Respimat82 claims
  6. Breztri Aerosphere80 claims

Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.

Industry payments in 2024: $1,348.73

68 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 8,806 providers of this specialty with any payment received $5,159.88 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Warren Fields$1,348.73
  2. Specialty average$5,159.88

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Bills Medicare through 2 group practices

  1. Beaumont Medical Group- Specialty ServicesFarmington Hills, MI
  2. Greenberger WU Dunn And Fields PLLCRoyal Oak, MI

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Warren Bradley Fields among 526 pulmonary disease physician records in Michigan

Warren Bradley Fields, M.D. is one of 526 pulmonary disease physician records with a practice address in Michigan. 86% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 44% of them.

  • NPI issued2007 · 44% of these records are older, 44% newer
  • In a Medicare fileYes · 86% of these records are
  • In the CMS Doctors and Clinicians fileYes · 74% of these records are
  • Graduated2000 · median 2004 among the 389 with a school on file
  • Record last updated2024 · 52% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RP1001X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Pulmonary Disease Physician providers in Michigan

There are 526 pulmonary disease physician records in Michigan.

All 526 in Michigan → Every provider in Royal Oak → Pulmonary Disease Physician nationwide →

The 8 pulmonary disease physician records with the nearest ZIP codes

  1. Abdulgadir Adam, M.D.Royal Oak, MI 480731942493838
  2. Robert BegleRoyal Oak, MI 480731548239023
  3. Paul Bozyk, M.D.Royal Oak, MI 480731356462279
  4. Enrique Calvo Ayala, M.D.Royal Oak, MI 480731699971713
  5. Marc Dunn, M.D.Royal Oak, MI 480731427002484
  6. Giovi Grasso Knight, MDRoyal Oak, MI 480731518054543
  7. Marc Greenberger, M.D.Royal Oak, MI 480731831145747
  8. Daniel Keena, M.D.Royal Oak, MI 480731528008802

Common questions

What is Warren Bradley Fields, M.D.'s NPI number?

Warren Bradley Fields, M.D.'s National Provider Identifier (NPI) is 1225158694, issued on Mar 30, 2007. An NPI identifies a provider in billing; it is not a license.

Where is Warren Bradley Fields, M.D. located?

The NPPES record lists a practice address at 30701 Woodward Ave Ste 200, Royal Oak, MI, 48073. Phone: (248) 548-2114. Providers update this record themselves, so call before visiting.

How can I verify Warren Bradley Fields, M.D.'s license?

NPPES lists Michigan license number 4301076558, as entered by the provider. Search the Michigan Board of Medicine (LARA) at https://aca-prod.accela.com/MILARA/GeneralProperty/PropertyLookUp.aspx?isLicensee=Y&TabName=APO. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does Warren Bradley Fields, M.D. prescribe under Medicare Part D?

In 2024, Warren Bradley Fields, M.D. had 2,248 Medicare Part D claims for 366 beneficiaries; the average among pulmonary disease physician prescribers was 1,425. Part D covers Medicare prescriptions only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.