NPPES file of Aug 9, 2026

Isaac E. Stillman, M.D.

Anatomic Pathology Physician · Boston, MA

Isaac E. Stillman, M.D. is an anatomic pathology physician with a practice address in Boston, Massachusetts, and NPI 1548207723, issued on May 31, 2006. Check the license (Massachusetts 74489, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.

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

NPPES recordNPPES file of Aug 9, 2026
1548207723
Name
Isaac E. Stillman
Credential
M.D.
Primary taxonomy
Anatomic Pathology Physician 207ZP0101X
License number
74489 MA
Self-reported in NPPES; status is on the state search
Practice location
330 Brookline Avenue, Boston, MA 02215
Phone
(617) 667-5959
Enumerated
May 31, 2006
Record last updated
Jul 13, 2026
Medicare enrollment
Enrolled (PECOS I20230706000834); accepts Medicare assignment
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 anatomic pathology physician records → All 277 in Massachusetts → Look up another NPI →

Also registered at 330 Brookline Avenue

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

  1. Karin Adrai, M.D.Neuroradiology Physician1295524338
  2. Adel Alhazzani, M.DVascular Neurology Physician1013156249
  3. Asha Anandaiah, MDPulmonary Disease Physician1184627481
  4. Katherine Armstrong, MDObstetrics & Gynecology Physician1104188853
  5. Joseph Aronovitz, M.D.Radiation Oncology Physician1316995418
  6. Sai Preethi Athota, MBBS, M.DStudent in an Organized Health Care Education/Training Program1811788698

Verify Isaac E. Stillman 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 74489    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

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Bills Medicare through one group practice

  1. Icahn School OF Medicine AT Mount SinaiNew York, NY

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

Isaac E. Stillman among 277 anatomic pathology physician records in Massachusetts

Isaac E. Stillman, M.D. is one of 277 anatomic pathology physician records with a practice address in Massachusetts. 62% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 12% of them.

  • NPI issued2006 · 12% of these records are older, 49% newer
  • In a Medicare fileYes · 62% of these records are
  • In the CMS Doctors and Clinicians fileYes · 60% of these records are
  • Graduated1987 · median 2000 among the 167 with a school on file
  • 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 207ZP0101X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Anatomic Pathology Physician providers in Massachusetts

There are 277 anatomic pathology physician records in Massachusetts.

All 277 in Massachusetts → Every provider in Boston → Anatomic Pathology Physician nationwide →

The 8 anatomic pathology physician records with the nearest ZIP codes

  1. Donald Antonioli, M.D.Boston, MA 022151245345131
  2. Madhu Dahiya, M.D.Boston, MA 022151750338489
  3. Harold Dvorak, M.D.Boston, MA 022151306951454
  4. Jeffrey Goldsmith, M.D.Boston, MA 022151225143282
  5. Joel Henderson, MDBoston, MA 022151437165958
  6. Olivier Nicolas Kocher, M.D.Boston, MA 022151669586566
  7. Imad Ahmad Nasser, M.D.Boston, MA 022151891735338
  8. Jeffrey Saffitz, MD, PHDBoston, MA 022151104898451

Common questions

What is Isaac E. Stillman, M.D.'s NPI number?

Isaac E. Stillman, M.D.'s National Provider Identifier (NPI) is 1548207723, issued on May 31, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Isaac E. Stillman, M.D. located?

The NPPES record lists a practice address at 330 Brookline Avenue, Boston, MA, 02215. Phone: (617) 667-5959. Providers update this record themselves, so call before visiting.

How can I verify Isaac E. Stillman, M.D.'s license?

NPPES lists Massachusetts license number 74489, 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. 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.