Patrick Callahan, MD
NPI 1447218060 · Anesthesiology Physician · Chestertown, MD
Enrolled with Medicare as Practitioner - Anesthesiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Patrick Callahan, MD is a Anesthesiology Physician provider in Chestertown, MD (NPI 1447218060).
Provider details
- NPI number
- 1447218060
- Entity type
- Individual
- Primary specialty
- Anesthesiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- D0046630 (MD)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
3,977 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 1,438 | $128 |
| Chronic Pain Management and Treatment, Monthly Bundle Including, Diagnosis; Assessment and Monitoring; Administration of a Validated Pain Rating Scale Or Tool; the Development, Implementation, Revision, And/Or Maintenance of a Person-Centered Care Plan ThaG3002 | 1,356 | $82 |
| Destruction of Lower Or Sacral Spinal Facet Joint Nerves Using Imaging Guidance, Each Additional Facet Joint64636 | 192 | $58 |
| Injection of Substance Into Lower Spine Canal Using Imaging Guidance62323 | 191 | $98 |
| Destruction of Lower Or Sacral Spinal Facet Joint Nerves Using Imaging Guidance, Single Facet Joint64635 | 183 | $191 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 46 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Oxycodone Hcl | 2,184 | 224 |
| Gabapentin | 603 | 88 |
| Oxycodone Hcl/Acetaminophenbrand: Oxycodone-Acetaminophen | 500 | 82 |
| Pregabalin | 368 | 74 |
| Tizanidine Hcl | 294 | 59 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 276 | 44 |
| Diazepam |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-03
- Last updated
- 2023-11-08
- Certified
- 2023-11-08
Frequently asked questions
- What is Patrick Callahan's NPI number?
- Patrick Callahan's National Provider Identifier (NPI) is 1447218060, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Patrick Callahan's specialty?
- Patrick Callahan is listed in the NPPES registry with a primary specialty of Anesthesiology Physician (Allopathic & Osteopathic Physicians).
- Where is Patrick Callahan located?
- Patrick Callahan's practice location on file with NPPES is 100 Brown St, Chestertown, MD 21620.
- What is Patrick Callahan's phone number?
- The practice phone number listed in the NPPES registry for Patrick Callahan is (410) 778-3300.
- Does Patrick Callahan accept Medicare?
- Patrick Callahan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Patrick Callahan's NPI active?
- Yes — Patrick Callahan's NPI (1447218060) is active in the NPPES registry as of the last update on 2023-11-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.