Katherine Ratzan Peeler, M.D.
Pediatric Critical Care Medicine Physician · Boston, MA
Katherine Ratzan Peeler, M.D. is a pediatric critical care medicine physician with a practice address in Boston, Massachusetts, and NPI 1316268535, issued on Jun 22, 2010. Check the license (Massachusetts 254552, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Katherine Ratzan Peeler
- Credential
- M.D.
- Primary taxonomy
- Pediatric Critical Care Medicine Physician 2080P0203X
- License number
- 254552 MA
Self-reported in NPPES; status is on the state search - Practice location
- 300 Longwood Ave # Bader634, Boston, MA 02115
- Phone
- (617) 355-7327
- Enumerated
- Jun 22, 2010
- Record last updated
- May 20, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (617) 730-0453
- Medicare enrollment
- Enrolled (PECOS I20160811001734); accepts Medicare assignment
- Medical or professional school
- Geisel School Of Medicine At Dartmouth, 2010
- Entity
- Type 1 · individual
8 nearest pediatric critical care medicine physician records → All 121 in Massachusetts → Look up another NPI →
Also registered at 300 Longwood Ave # Bader634
A shared address usually means a shared clinic or building; it does not show who employs whom.
- David Bailly, D.O.Pediatric Critical Care Medicine Physician1851505069
Verify Katherine Ratzan Peeler in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 254552Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $22.98
1 payment: food and beverage; the largest payer was Acadia Pharmaceuticals Inc. The 414 providers of this specialty with any payment received $1,291.66 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Children's Hospital Pediatric Associates, IncBoston, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Katherine Ratzan Peeler among 121 pediatric critical care medicine physician records in Massachusetts
Katherine Ratzan Peeler, M.D. is one of 121 pediatric critical care medicine physician records with a practice address in Massachusetts. 43% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 49% of them.
- NPI issued2010 · 49% of these records are older, 49% newer
- In a Medicare fileYes · 43% of these records are
- In the CMS Doctors and Clinicians fileYes · 45% of these records are
- Graduated2010 · median 2010 among the 55 with a school on file
- Record last updated2016 · 53% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2080P0203X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Pediatric Critical Care Medicine Physician providers in Massachusetts
There are 121 pediatric critical care medicine physician records in Massachusetts.
All 121 in Massachusetts → Every provider in Boston → Pediatric Critical Care Medicine Physician nationwide →
The 8 pediatric critical care medicine physician records with the nearest ZIP codes
- Michael Agus, MDBoston, MA 021151952382301
- Jeffrey Burns, MDBoston, MA 021151821065327
- Robert Graham, MDBoston, MA 021151699743682
- John Kheir, M.D.Boston, MA 021151659355279
- Peter Laussen, MDBoston, MA 021151073584967
- Benjamin Matthews, MDBoston, MA 021151851382436
- Robert Pascucci, MDBoston, MA 021151194793752
- Gregory Priebe, MDBoston, MA 021151285695387
Common questions
What is Katherine Ratzan Peeler, M.D.'s NPI number?
Katherine Ratzan Peeler, M.D.'s National Provider Identifier (NPI) is 1316268535, issued on Jun 22, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Katherine Ratzan Peeler, M.D. located?
The NPPES record lists a practice address at 300 Longwood Ave # Bader634, Boston, MA, 02115. Phone: (617) 355-7327. Providers update this record themselves, so call before visiting.
How can I verify Katherine Ratzan Peeler, M.D.'s license?
NPPES lists Massachusetts license number 254552, 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.
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.