Charles Leo Callaghan, MD
Internal Medicine Physician · Saint Paul, MN
Charles Leo Callaghan, MD is an internal medicine physician with a practice address in Saint Paul, Minnesota, and NPI 1649369489, issued on Oct 12, 2006. Check the license (Minnesota 37316, as entered in NPPES) on the Minnesota Board of Medical Practice; the Medicare figures below come from public CMS files.
- Name
- Charles Leo Callaghan
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 37316 MN
Self-reported in NPPES; status is on the state search - Practice location
- 17 W Exchange St, Saint Paul, MN 55102
- Phone
- (651) 232-4125
- Enumerated
- Oct 12, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (651) 232-4127
- Medicare enrollment
- Enrolled (PECOS I20100817001696); accepts Medicare assignment
- Medical or professional school
- Loyola University Of Chicago, Stritch School Of Medicine, 1993
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,632 in Minnesota → Look up another NPI →
Verify Charles Leo Callaghan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMinnesota Board of Medical Practice
Search for license 37316Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.8 times the Medicare Part D claims of the average internal medicine physician in 2024
9,049 Medicare Part D claims for 890 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 145 claims were for opioids.
Most prescribed
- Atorvastatin Calcium529 claims
- Losartan Potassium397 claims
- Rosuvastatin Calcium374 claims
- Amlodipine Besylate330 claims
- Levothyroxine Sodium322 claims
- Simvastatin313 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
- Healtheast Medical Research InstituteMaplewood, MN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Charles Leo Callaghan among 2,632 internal medicine physician records in Minnesota
Charles Leo Callaghan, MD is one of 2,632 internal medicine physician records with a practice address in Minnesota. 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 8% of them.
- NPI issued2006 · 8% of these records are older, 58% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 65% of these records are
- Graduated1993 · median 2008 among the 1,700 with a school on file
- Record last updated2007 · 57% 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 Minnesota practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
254 internal medicine physician records list a practice address in Saint Paul
They are 254 of the 10,084 NPPES records with a practice address in Saint Paul, and 2,632 internal medicine physician records in Minnesota.
All 2,632 in Minnesota → Every provider in Saint Paul → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Lisa Anderson, MDSaint Paul, MN 551021023079217
- Eric Anderson, MDSaint Paul, MN 551021225090707
- William Armstrong, MDSaint Paul, MN 551021073570099
- Alfredo Beltran, MDSaint Paul, MN 551021811953359
- Michael Bozivich, MDSaint Paul, MN 551021023073913
- Christine Chua, MDSaint Paul, MN 551021346202777
- James Giefer, MDSaint Paul, MN 551021982669990
- Joshua Hladio, MDSaint Paul, MN 551021780646919
Common questions
What is Charles Leo Callaghan, MD's NPI number?
Charles Leo Callaghan, MD's National Provider Identifier (NPI) is 1649369489, issued on Oct 12, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Charles Leo Callaghan, MD located?
The NPPES record lists a practice address at 17 W Exchange St, Saint Paul, MN, 55102. Phone: (651) 232-4125. Providers update this record themselves, so call before visiting.
How can I verify Charles Leo Callaghan, MD's license?
NPPES lists Minnesota license number 37316, as entered by the provider. Search the Minnesota Board of Medical Practice at https://mn.gov/boards/medical-practice/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Charles Leo Callaghan, MD prescribe under Medicare Part D?
In 2024, Charles Leo Callaghan, MD had 9,049 Medicare Part D claims for 890 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.