NPPES file of Aug 9, 2026

William Marsh Baldwin, M.D.

Anatomic Pathology & Clinical Pathology Physician · Baltimore, MD

William Marsh Baldwin, M.D. is an anatomic pathology & clinical pathology physician with a practice address in Baltimore, Maryland, and NPI 1053376129, issued on Apr 20, 2006. Check the license (Maryland D44172, as entered in NPPES) on the Maryland Board of Physicians; the federal record below is the public data PlainDoctor holds for this provider.

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

NPPES recordNPPES file of Aug 9, 2026
1053376129
Name
William Marsh Baldwin
Credential
M.D.
Primary taxonomy
Anatomic Pathology & Clinical Pathology Physician 207ZP0102X
License number
D44172 MD
Self-reported in NPPES; status is on the state search
Practice location
600 N Wolfe St, Baltimore, MD 21287
Phone
(410) 955-2660
Enumerated
Apr 20, 2006
Record last updated
Jul 13, 2026
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest anatomic pathology & clinical pathology physician records → All 357 in Maryland → Look up another NPI →

Also registered at 600 N Wolfe St

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

  1. Abdulrahman Abodarahim, MBBCHOphthalmology Physician1770182560
  2. Aida Abou-ZamzamStudent in an Organized Health Care Education/Training Program1891456034
  3. Mya AbousyStudent in an Organized Health Care Education/Training Program1700422169
  4. Christopher Abularrage, MDVascular Surgery Physician1063675908
  5. Sahaja Acharya, M.D.Radiation Oncology Physician1639436603
  6. Stephen Achuff, M.D.Cardiovascular Disease Physician1326001033

Verify William Marsh Baldwin in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMaryland Board of Physicians
    Search for license D44172    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 Maryland license search

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William Marsh Baldwin among 357 anatomic pathology & clinical pathology physician records in Maryland

William Marsh Baldwin, M.D. is one of 357 anatomic pathology & clinical pathology physician records with a practice address in Maryland. 59% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 5% of them.

  • NPI issued2006 · 5% of these records are older, 52% newer
  • In a Medicare fileNo · 59% of these records are
  • In the CMS Doctors and Clinicians fileNo · 54% of these records are
  • Record last updated2026 · 58% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207ZP0102X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Anatomic Pathology & Clinical Pathology Physician providers in Maryland

There are 357 anatomic pathology & clinical pathology physician records in Maryland. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 357 in Maryland → Every provider in Baltimore → Anatomic Pathology & Clinical Pathology Physician nationwide →

The 8 anatomic pathology & clinical pathology physician records with the nearest ZIP codes

  1. Robert Anders, M.D.Baltimore, MD 212871841254737
  2. Pedram Argani, M.D.Baltimore, MD 212871972567782
  3. Frederic Askin, M.D.Baltimore, MD 212871649235474
  4. David Berman, M.D.Baltimore, MD 212871487610754
  5. John Boitnott, M.D.Baltimore, MD 212871952367658
  6. Michael Borowitz, M.D.Baltimore, MD 212871689630733
  7. Peter Burger, M.D.Baltimore, MD 212871114985603
  8. Patrizio Caturegli, M.D.Baltimore, MD 212871194774364

Common questions

What is William Marsh Baldwin, M.D.'s NPI number?

William Marsh Baldwin, M.D.'s National Provider Identifier (NPI) is 1053376129, issued on Apr 20, 2006. An NPI identifies a provider in billing; it is not a license.

Where is William Marsh Baldwin, M.D. located?

The NPPES record lists a practice address at 600 N Wolfe St, Baltimore, MD, 21287. Phone: (410) 955-2660. Providers update this record themselves, so call before visiting.

How can I verify William Marsh Baldwin, M.D.'s license?

NPPES lists Maryland license number D44172, as entered by the provider. Search the Maryland Board of Physicians at https://www.mbp.state.md.us/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.