NPPES file of Aug 9, 2026

Ronald K. Warren, M.D.

Neurological Surgery Physician · Cambridge, MA

Ronald K. Warren, M.D. is a neurological surgery physician with a practice address in Cambridge, Massachusetts, and NPI 1760446520, issued on Apr 17, 2006. Check the license (Massachusetts 44013, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; 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
1760446520
Name
Ronald K. Warren
Credential
M.D.
Primary taxonomy
Neurological Surgery Physician 207T00000X
License number
44013 MA
Self-reported in NPPES; status is on the state search
Practice location
300 Mount Auburn St, Cambridge, MA 02138
Phone
(617) 491-6766
Enumerated
Apr 17, 2006
Record last updated
Jun 30, 2015 (not updated in 11 years: call before relying on the address or phone)
Fax
(617) 491-2552
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 neurological surgery physician records → All 236 in Massachusetts → Look up another NPI →

Also registered at 300 Mount Auburn St

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

  1. Karen Ahlert, M.D.Surgery Physician1083819502
  2. John Anderson, MDGeriatric Medicine (Internal Medicine) Physician1568462620
  3. Daniel Asnes, M.D.Psychiatry Physician1316093628
  4. Julio Ayala, MDGastroenterology Physician1104883347
  5. Elizabeth Baker, M.D.Obstetrics & Gynecology Physician1659579969
  6. Paul Bertozzi, MDPulmonary Disease Physician1346312733

Verify Ronald K. Warren in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
    Search for license 44013    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 Massachusetts license search

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Ronald K. Warren among 236 neurological surgery physician records in Massachusetts

Ronald K. Warren, M.D. is one of 236 neurological surgery physician records with a practice address in Massachusetts. 74% 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 12% of them.

  • NPI issued2006 · 12% of these records are older, 58% newer
  • In a Medicare fileNo · 74% of these records are
  • In the CMS Doctors and Clinicians fileNo · 65% of these records are
  • Record last updated2015 · 69% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207T00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Neurological Surgery Physician providers in Massachusetts

There are 236 neurological surgery physician records in Massachusetts. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 236 in Massachusetts → Every provider in Cambridge → Neurological Surgery Physician nationwide →

The 8 neurological surgery physician records with the nearest ZIP codes

  1. Tina Lin, MDCambridge, MA 021381447225156
  2. Katherine Wang, MDCambridge, MA 021381912988486
  3. Ekkehard Kasper, MDBrighton, MA 021351053354852
  4. Zachary Tataryn, MDBrighton, MA 021351518251834
  5. James Reed, M.D.Boston, MA 021321427027788
  6. Nicolas Marcotte, MD.FRCSC.FACS.Boston, MA 021201225260102
  7. Gerwin Neumann, M.D.Roxbury Crossing, MA 021201972640217
  8. Eric Woodard, M.D.Roxbury Crossing, MA 021201932101433

Common questions

What is Ronald K. Warren, M.D.'s NPI number?

Ronald K. Warren, M.D.'s National Provider Identifier (NPI) is 1760446520, issued on Apr 17, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Ronald K. Warren, M.D. located?

The NPPES record lists a practice address at 300 Mount Auburn St, Cambridge, MA, 02138. Phone: (617) 491-6766. Providers update this record themselves, so call before visiting.

How can I verify Ronald K. Warren, M.D.'s license?

NPPES lists Massachusetts license number 44013, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. 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.