Dr. Patrick E. Callahan, MD
- Medicare services, 2024
- 3,977
- Medicare patients, 2024
- 362
- Part D claims, 2024
- 7,377
- MIPS score, 2024
- 83
- Hospital affiliations
- 2
- Practice address
- 360 East Pulaski Highway, Suite 2a, Elkton, MD 21921
- Practice phone
- Call (410) 620-3348
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Upper Bay Surgery Center
Surgery Center - Medicare-Certified · Elkton, Maryland
Find Dr. Callahan's professional email, personal email and mobile number
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Dr. Patrick E. Callahan is an anesthesiologist in Elkton, Maryland
Dr. Callahan practices at Upper Bay Surgery Center in Elkton, Maryland.
Dr. Callahan's NPI, 1447218060, was assigned on May 3, 2006. Dr. Callahan graduated from Eastern Virginia Medical School in 1991. Dr. Callahan holds Maryland license D0046630.
- NPI
- 1447218060NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5395930150
- NPI enumeration date
- May 3, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (410) 620-3348
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 61
- Medical school graduation
- 1991
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Patrick E. Callahan practices at Upper Bay Surgery Center in Elkton, Maryland
Dr. Callahan's primary practice is Upper Bay Surgery Center, at 360 East Pulaski Highway, Suite 2a, Elkton, MD 21921. The practice phone is (410) 620-3348.
- Upper Bay Surgery Center360 East Pulaski Highway, Suite 2a, Elkton, MD 21921Phone(410) 620-3348
Source: Dmand AI Affiliation Data
Dr. Patrick E. Callahan is affiliated with 3 sites of care and 2 medical groups
Dr. Callahan's primary practice is Upper Bay Surgery Center in Elkton, Maryland. Dr. Callahan is also affiliated with University of Maryland Shore Medical Center at Easton. The medical group on file is Agape Physical Therapy. Dmand AI also links Dr. Callahan to 1 more hospital and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Patrick E. Callahan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Callahan practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Upper Bay Surgery Center | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Patrick E. Callahan is one of 965 anesthesiologists in Maryland
Anesthesiology is Dr. Callahan's primary specialty in the NPI Registry, under taxonomy code 207L00000X. Dr. Callahan is licensed in Maryland.
Specialties and state licenses
- Anesthesiology, MarylandPrimary
Anesthesiologists near Dr. Callahan
Counts of anesthesiologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Patrick E. Callahan billed Medicare for 3,977 services in 2024
CMS data shows 3,977 Medicare services from Dr. Callahan across 12 procedure codes in 2024, for 362 Medicare patients. Medicare paid $324,291 for them.
Dr. Callahan's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1,5082024: 1,6358%
- Other services
- 2023: 8102024: 1,35667%
- Surgery
- 2023: 1,0872024: 9869%
Where Dr. Callahan's Medicare services took place, 2024
- In an office2,99175%
- In a facility98625%
Dr. Callahan compared with the Maryland median for anesthesiologists, 2024
- Dr. Callahan
- Maryland median
- Medicare services
- 3,977vs 10139.4 times
- Medicare patients
- 362vs 1762.1 times
- Part D claims
- 7,216vs 29248.8 times
Medians across 918 anesthesiologists in Maryland with Dmand AI profiles that report each measure.
Dr. Callahan's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Callahan and other anesthesiologists in Maryland.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Patrick E. Callahan treated 362 Medicare patients in 2024, average age 70
CMS counts 362 Medicare patients who saw Dr. Callahan in 2024. The largest group is 65 to 74, with 140 patients. 75% of them have arthritis, and 75% have high blood pressure. 33% are also on Medicaid. Their average risk score is 1.16, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Callahan's median patient age at 65, with 63% women.
Dr. Callahan's Medicare patients by age, 2024
Dr. Callahan's Medicare patients by sex, 2024
- Women21459%
- Men14841%
Chronic conditions among Dr. Callahan's Medicare patients, 2024
- Arthritis75%
- High blood pressure75%
- High cholesterol75%
- Diabetes35%
- Mood disorders33%
- Anxiety31%
- Depression29%
- COPD26%
Share of Medicare patients with each condition. A patient can have several.
Dr. Callahan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 65
Patient panel by sex, all payers
- Women63%
- Men37%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Patrick E. Callahan wrote 7,377 Medicare Part D claims in 2024
In 2024, Dr. Callahan wrote 7,377 Medicare Part D claims for 448 patients. 96% of them were for generic drugs. CMS names the drug for 7,216 of them, across 46 drugs with 11 or more claims each, at $263,743 in total drug cost. In 2023, CMS named 6,809 claims across 46 drugs.
Dr. Callahan's Part D claims by kind of drug, 2024
- Generic7,071 claims96%
- Brand-name306 claims4%
Dr. Callahan's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Callahan's Part D claims, 2024
- Opioids52%3,825 of 7,377 claims
- Antibiotics0%19 of 7,377 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 6,8092024: 7,2166%
Drugs named by CMS: 46 in 2024, 46 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Patrick E. Callahan scored 83 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 83 out of 100 for Dr. Callahan for performance year 2024, reported individually. Dr. Callahan accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Callahan's MIPS scores, performance year 2024
- 83of 100Final score
- 64.6of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 64of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Patrick E. Callahan received $1,652 in industry payments from 2016 to 2023
CMS Open Payments shows 136 general payments to Dr. Callahan from 14 drug and device companies from 2016 to 2023. Food and beverage make up the largest share, 98% of the total. Daiichi Sankyo Inc. paid the most, $815.
General payments to Dr. Callahan by program year, 2016 to 2023
General payments to Dr. Callahan by kind, 2016 to 2023
- Food and beverage$1,62298%
- Education$302%
Companies that paid Dr. Callahan the most, 2016 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Patrick E. Callahan graduated from Eastern Virginia Medical School
Dr. Callahan graduated from Eastern Virginia Medical School in 1991.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Patrick E. Callahan's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Patrick E. Callahan
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Patrick E. Callahan's NPI number?
Dr. Patrick E. Callahan's NPI number is 1447218060. It was assigned on May 3, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Patrick E. Callahan?
Dr. Patrick E. Callahan is an anesthesiologist in Elkton, Maryland. The primary specialty in the NPI Registry is Anesthesiology Physician (taxonomy code 207L00000X).
Where does Dr. Patrick E. Callahan practice?
Dr. Callahan practices at 360 East Pulaski Highway, Suite 2a, Elkton, MD 21921. Dr. Callahan's primary practice is Upper Bay Surgery Center in Elkton, Maryland. Dmand AI also links Dr. Callahan to 1 hospital and 1 medical group.
What is Dr. Patrick E. Callahan's office phone number?
The practice phone on file for Dr. Callahan is (410) 620-3348.
What is Dr. Patrick E. Callahan's medical license number?
Dr. Callahan holds Maryland license D0046630.
Which hospitals is Dr. Patrick E. Callahan affiliated with?
Dr. Callahan is affiliated with University of Maryland Shore Medical Center at Easton. Dmand AI links Dr. Callahan to 1 more hospital.
What medical group is Dr. Patrick E. Callahan part of?
Dr. Callahan is linked to Agape Physical Therapy. Dmand AI links Dr. Callahan to 1 more medical group.
Does Dr. Patrick E. Callahan accept Medicare?
Yes. CMS data shows Dr. Callahan billed Medicare for 3,977 services in 2024, and Dr. Callahan accepts Medicare assignment.
What is Dr. Patrick E. Callahan's MIPS score?
Dr. Callahan's MIPS final score for performance year 2024 is 83 out of 100, reported individually.
How many Medicare patients does Dr. Patrick E. Callahan see?
CMS counts 362 Medicare patients who saw Dr. Callahan in 2024, with an average age of 70.
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What services does Dr. Patrick E. Callahan bill to Medicare?
In 2024, Dr. Callahan's most billed Medicare services were office visit, established patient (99214), medicare service (G3002) and surgery: brain, spine and nerves (64636).
Where did Dr. Patrick E. Callahan go to medical school?
Dr. Callahan graduated from Eastern Virginia Medical School in 1991.
What drugs does Dr. Patrick E. Callahan prescribe most?
In 2024 Medicare Part D data, Dr. Callahan's most prescribed drugs by claims were Oxycodone HCl, Gabapentin and Oxycodone-Acetaminophen.
Has Dr. Patrick E. Callahan received payments from drug or device companies?
CMS Open Payments shows $1,652 in general payments to Dr. Callahan from 14 companies from 2016 to 2023. The largest total came from Daiichi Sankyo Inc.
How long has Dr. Patrick E. Callahan been practicing?
Dr. Callahan graduated from medical school in 1991, 35 years ago.
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