Patrick E. Callahan, MD
Anesthesiology Physician · Chestertown, MD
Patrick E. Callahan, MD is an anesthesiology physician with a practice address in Chestertown, Maryland, and NPI 1447218060, issued on May 3, 2006. Check the license (Maryland D0046630, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Patrick E. Callahan
- Credential
- MD
- Primary taxonomy
- Anesthesiology Physician 207L00000X
- License number
- D0046630 MD
Self-reported in NPPES; status is on the state search - Practice location
- 100 Brown St, Chestertown, MD 21620
- Phone
- (410) 778-3300
- Enumerated
- May 3, 2006
- Record last updated
- Nov 8, 2023
- Fax
- (410) 810-7808
- Medicaid ID
- 245941800 MD
- Medicare enrollment
- Enrolled (PECOS I20101108000137); accepts Medicare assignment
- Medical or professional school
- Eastern Virginia Medical School, 1991
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest anesthesiology physician records → All 1,253 in Maryland → Look up another NPI →
Also registered at 100 Brown St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Freddy Araujo-Vidal, M.D.Specialist1689612103
- Teresa Campos, PA-CPhysician Assistant1942489430
- Beverly Clarke, M.S.N., R.N., C.R.N.Family Nurse Practitioner1407941214
- Peter Clements, RNFARegistered Nurse First Assistant1114123007
- Keri Jacobs, MDEmergency Medical Services (Emergency Medicine) Physician1104952308
- Rudolph Jenkins, PA-CPhysician Assistant1790867364
Verify Patrick E. Callahan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D0046630Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
18.4 times the Medicare Part D claims of the average anesthesiology physician in 2024
7,377 Medicare Part D claims for 448 beneficiaries, against an average of 402 among the 4,319 providers of this specialty who prescribed in Part D. Brand-name drugs were 4% of claims. 3,825 claims were for opioids.
Most prescribed
- Oxycodone Hcl2,184 claims
- Gabapentin603 claims
- Oxycodone-Acetaminophen500 claims
- Pregabalin368 claims
- Tizanidine Hcl294 claims
- Hydrocodone-Acetaminophen276 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): 82.5 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).
Bills Medicare through 2 group practices
- Agape Physical Therapy And Sports Rehabilitation LPForest Hill, MD
- Chesapeake Anesthesiology And Pain Management Physicians LLCChestertown, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Patrick E. Callahan among 1,253 anesthesiology physician records in Maryland
Patrick E. Callahan, MD is one of 1,253 anesthesiology physician records with a practice address in Maryland. 72% 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 15% of them.
- NPI issued2006 · 15% of these records are older, 49% newer
- In a Medicare fileYes · 72% of these records are
- In the CMS Doctors and Clinicians fileYes · 65% of these records are
- Graduated1991 · median 2005 among the 813 with a school on file
- Record last updated2023 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207L00000X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Anesthesiology Physician providers in Maryland
There are 1,253 anesthesiology physician records in Maryland.
All 1,253 in Maryland → Every provider in Chestertown → Anesthesiology Physician nationwide →
The 8 anesthesiology physician records with the nearest ZIP codes
- Christine Garey, M.D.Cambridge, MD 216131265414205
- David Brandon, MDEaston, MD 216011922137942
- Manjit Chowdhary, M.DEaston, MD 216011538176250
- Y. Ding, M.D.Easton, MD 216011538141510
- Ona Kareiva, M.D.Easton, MD 216011225010267
- Bradley Kleinert, D.O.Easton, MD 216011619137890
- Stephen Lemke, DOEaston, MD 216011114245354
- Kathryn Meyer, M.D.Easton, MD 216011124000153
Common questions
What is Patrick E. Callahan, MD's NPI number?
Patrick E. Callahan, MD's National Provider Identifier (NPI) is 1447218060, issued on May 3, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Patrick E. Callahan, MD located?
The NPPES record lists a practice address at 100 Brown St, Chestertown, MD, 21620. Phone: (410) 778-3300. Providers update this record themselves, so call before visiting.
How can I verify Patrick E. Callahan, MD's license?
NPPES lists Maryland license number D0046630, as entered by the provider. Search the Maryland Board of Physicians at https://www.mbp.state.md.us/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Patrick E. Callahan, MD prescribe under Medicare Part D?
In 2024, Patrick E. Callahan, MD had 7,377 Medicare Part D claims for 448 beneficiaries; the average among anesthesiology physician prescribers was 402. Part D covers Medicare prescriptions only.
What is Patrick E. Callahan, MD's MIPS final score?
The 2023 MIPS final score is 82.5 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.