NPPES file of Aug 9, 2026

Mary S. Ahn, M.D.

Child & Adolescent Psychiatry Physician · Boston, MA

Mary S. Ahn, M.D. is a child & adolescent psychiatry physician with a practice address in Boston, Massachusetts, and NPI 1952429532, issued on Mar 26, 2007. Check the license (Massachusetts 212339, 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 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1952429532
Name
Mary S. Ahn
Credential
M.D.
Primary taxonomy
Child & Adolescent Psychiatry Physician 2084P0804X
License number
212339 MA
Self-reported in NPPES; status is on the state search
Practice location
50 Staniford St, Boston, MA 02114
Phone
(617) 726-2241
Enumerated
Mar 26, 2007
Record last updated
Dec 4, 2007 (not updated in 19 years: call before relying on the address or phone)
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.
Download card Updates feed

8 nearest child & adolescent psychiatry physician records → All 336 in Massachusetts → Look up another NPI →

Also registered at 50 Staniford St

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

  1. Robert Amrhein, M.D.Specialist1972676781
  2. Richard Anderson, MDDermatology Physician1700869831
  3. Anjum Ansari, D.M.D.General Practice Dentistry1578783346
  4. Alison Avram, M.D.Dermatology Physician1083721781
  5. Mathew Avram, MDDermatology Physician1295717296
  6. Lloyd Axelrod, MDInternal Medicine Physician1285625830

Verify Mary S. Ahn 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 212339    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.

Is this page about you? You can ask us to correct, restrict or remove it: how.

Industry payments in 2024: $151.93

1 payment: food and beverage; the largest payer was Galderma Laboratories, L.P. The 1,578 providers of this specialty with any payment received $1,427.96 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Mary Ahn$151.93
  2. Specialty average$1,427.96

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

Mary S. Ahn among 336 child & adolescent psychiatry physician records in Massachusetts

Mary S. Ahn, M.D. is one of 336 child & adolescent psychiatry physician records with a practice address in Massachusetts. 51% 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 47% of them.

  • NPI issued2007 · 47% of these records are older, 39% newer
  • In a Medicare fileYes · 51% of these records are
  • In the CMS Doctors and Clinicians fileNo · 29% of these records are
  • Record last updated2007 · 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 2084P0804X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Child & Adolescent Psychiatry Physician providers in Massachusetts

There are 336 child & adolescent psychiatry physician records in Massachusetts.

All 336 in Massachusetts → Every provider in Boston → Child & Adolescent Psychiatry Physician nationwide →

The 8 child & adolescent psychiatry physician records with the nearest ZIP codes

  1. Annah Abrams, MDBoston, MA 021141689665234
  2. Donald Condie, MDBoston, MA 021141366417347
  3. Marcus Favero, MDBoston, MA 021141730152463
  4. John Julian, MDBoston, MA 021141013998483
  5. Ranna Parekh, MDBoston, MA 021141003840190
  6. Elizabeth Pinsky, M.D.Boston, MA 021141437286895
  7. Lisa Price, MDBoston, MA 021141902810435
  8. Jefferson Prince, MDBoston, MA 021141891714804

Common questions

What is Mary S. Ahn, M.D.'s NPI number?

Mary S. Ahn, M.D.'s National Provider Identifier (NPI) is 1952429532, issued on Mar 26, 2007. An NPI identifies a provider in billing; it is not a license.

Where is Mary S. Ahn, M.D. located?

The NPPES record lists a practice address at 50 Staniford St, Boston, MA, 02114. Phone: (617) 726-2241. Providers update this record themselves, so call before visiting.

How can I verify Mary S. Ahn, M.D.'s license?

NPPES lists Massachusetts license number 212339, 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.