Mary B. Callahan, D.O.
Cardiovascular Disease Physician · Sandwich, MA
Mary B. Callahan, D.O. is a cardiovascular disease physician with a practice address in Sandwich, Massachusetts, and NPI 1518968882, issued on Aug 9, 2005. Check the license (Massachusetts 160179, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Mary B. Callahan
- Credential
- D.O.
- Primary taxonomy
- Cardiovascular Disease Physician 207RC0000X
- License number
- 160179 MA
Self-reported in NPPES; status is on the state search - Practice location
- 68A Route 6A, Sandwich, MA 02563
- Phone
- (774) 413-5457
- Enumerated
- Aug 9, 2005
- Record last updated
- Jun 26, 2026
- Fax
- (773) 413-5985
- Medicaid ID
- 3200680 MA
- Medicare enrollment
- Enrolled (PECOS I20070814000547); accepts Medicare assignment
- Medical or professional school
- University Of New England, College Of Osteo Medicine, 1992
- Entity
- Type 1 · individual
8 nearest cardiovascular disease physician records → All 1,080 in Massachusetts → Look up another NPI →
Also registered at 68A Route 6A
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ramon Espinosa, M.D.Internal Medicine Physician1245287838
Verify Mary B. 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 160179Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
27% fewer Medicare Part D claims than the average cardiovascular disease physician in 2024
2,246 Medicare Part D claims for 257 beneficiaries, against an average of 3,078 among the 20,728 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims.
Most prescribed
- Metoprolol Succinate321 claims
- Valsartan158 claims
- Rosuvastatin Calcium150 claims
- Amlodipine Besylate144 claims
- Lisinopril139 claims
- Atorvastatin Calcium137 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.
The MIPS final score for 2023 (Medicare payment program): 90.8 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $563.07
28 payments; by number, the most common kind was food and beverage; the largest payer was Novartis Pharmaceuticals Corporation. The 16,686 providers of this specialty with any payment received $3,819.56 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.
Mary B. Callahan among 1,080 cardiovascular disease physician records in Massachusetts
Mary B. Callahan, D.O. is one of 1,080 cardiovascular disease 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 83% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 65% of these records are
- Graduated1992 · median 2001 among the 698 with a school on file
- Record last updated2026 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Cardiovascular Disease Physician providers in Massachusetts
There are 1,080 cardiovascular disease physician records in Massachusetts.
All 1,080 in Massachusetts → Every provider in Sandwich → Cardiovascular Disease Physician nationwide →
The 8 cardiovascular disease physician records with the nearest ZIP codes
- Bruce Brown, MDWareham, MA 025711205896362
- Matthew Costa, D.O.Wareham, MA 025711942464649
- Ashwini Sahni, MDWareham, MA 025711649233529
- Normand Lazarow, MDWoods Hole, MA 025431033292289
- George Christman, MDFalmouth, MA 025401023057361
- John Guerin, M.D.Falmouth, MA 025401740391432
- John Hostetter, M.D.Falmouth, MA 025401518069954
- Jennifer Ladner, MDFalmouth, MA 025401801833488
Common questions
What is Mary B. Callahan, D.O.'s NPI number?
Mary B. Callahan, D.O.'s National Provider Identifier (NPI) is 1518968882, issued on Aug 9, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Mary B. Callahan, D.O. located?
The NPPES record lists a practice address at 68A Route 6A, Sandwich, MA, 02563. Phone: (774) 413-5457. Providers update this record themselves, so call before visiting.
How can I verify Mary B. Callahan, D.O.'s license?
NPPES lists Massachusetts license number 160179, 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 Mary B. Callahan, D.O. prescribe under Medicare Part D?
In 2024, Mary B. Callahan, D.O. had 2,246 Medicare Part D claims for 257 beneficiaries; the average among cardiovascular disease physician prescribers was 3,078. Part D covers Medicare prescriptions only.
What is Mary B. Callahan, D.O.'s MIPS final score?
The 2023 MIPS final score is 90.8 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.