Kristin M. O'Neil-Callahan, M.D.
Internal Medicine Physician · Peabody, MA
Kristin M. O'Neil-Callahan, M.D. is an internal medicine physician with a practice address in Peabody, Massachusetts, and NPI 1215985445, issued on May 4, 2006. Check the license (Massachusetts 214128, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Kristin M. O'Neil-Callahan
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 214128 MA
Self-reported in NPPES; status is on the state search - Practice location
- 2 Essex Dr, Peabody, MA 01960
- Phone
- (978) 532-2800
- Enumerated
- May 4, 2006
- Record last updated
- Jun 8, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (978) 977-4492
- Medicaid ID
- 0175111 MA
- Medicare enrollment
- Enrolled (PECOS I20040726000793); accepts Medicare assignment
- Medical or professional school
- Georgetown University School Of Medicine, 1999
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 6,825 in Massachusetts → Look up another NPI →
Also registered at 2 Essex Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- William Boyd, M.D.Internal Medicine Physician1922066885
- Marvin Clopper, M.D.Internal Medicine Physician1912965047
- Mary Cunningham, D.O.Internal Medicine Physician1013975457
- Irena Druzba-Lobsenz, M.D.Internal Medicine Physician1417915554
- Eileen Haley, M.D.Internal Medicine Physician1780642983
- Maria Palermo, NPAdult Health Nurse Practitioner1093771487
Verify Kristin M. O'Neil-Callahan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 214128Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
29% more Medicare Part D claims than the average internal medicine physician in 2024
4,091 Medicare Part D claims for 496 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 16 claims were for opioids.
Most prescribed
- Atorvastatin Calcium293 claims
- Lisinopril265 claims
- Levothyroxine Sodium216 claims
- Amlodipine Besylate189 claims
- Hydrochlorothiazide181 claims
- Simvastatin175 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Mass General Brigham Medical Group Northern Massachusetts IncDanvers, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Kristin M. O'Neil-Callahan among 6,825 internal medicine physician records in Massachusetts
Kristin M. O'Neil-Callahan, M.D. is one of 6,825 internal medicine physician records with a practice address in Massachusetts. 75% 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, 54% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated1999 · median 2004 among the 4,103 with a school on file
- Record last updated2011 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
46 internal medicine physician records list a practice address in Peabody
They are 46 of the 1,313 NPPES records with a practice address in Peabody, and 6,825 internal medicine physician records in Massachusetts.
All 6,825 in Massachusetts → Every provider in Peabody → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Joseph August, M.D.Peabody, MA 019601902802879
- Leonard Austin, M.D.Peabody, MA 019601669443917
- James Brown, MDPeabody, MA 019601134194855
- Irena Druzba-Lobsenz, M.D.Peabody, MA 019601417915554
- Feng Ge, MDPeabody, MA 019601922004803
- Louis Giorgio, MDPeabody, MA 019601376533497
- Michael Golden, MDPeabody, MA 019601609872571
- Donald Kleykamp, MDPeabody, MA 019601689662504
Common questions
What is Kristin M. O'Neil-Callahan, M.D.'s NPI number?
Kristin M. O'Neil-Callahan, M.D.'s National Provider Identifier (NPI) is 1215985445, issued on May 4, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Kristin M. O'Neil-Callahan, M.D. located?
The NPPES record lists a practice address at 2 Essex Dr, Peabody, MA, 01960. Phone: (978) 532-2800. Providers update this record themselves, so call before visiting.
How can I verify Kristin M. O'Neil-Callahan, M.D.'s license?
NPPES lists Massachusetts license number 214128, 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.
How much does Kristin M. O'Neil-Callahan, M.D. prescribe under Medicare Part D?
In 2024, Kristin M. O'Neil-Callahan, M.D. had 4,091 Medicare Part D claims for 496 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
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.