Sean Callahan, M.D.
NPI 1194811828 · Family Medicine Physician · Oak Harbor, OH
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sean Callahan, M.D. is a Family Medicine Physician provider in Oak Harbor, OH (NPI 1194811828).
Provider details
- NPI number
- 1194811828
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 35-07-4846 (OH)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,141 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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 | 550 | $120 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 114 | $83 |
| Hemoglobin A1c Level83036 | 96 | $9 |
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 66 | $102 |
| Subsequent Nursing Facility Care With Straightforward Level of Medical Decision Making, Per Day, If Using Time, 20 Minutes Or More99308 | 65 | $70 |
| Initial Nursing Facility Care With High Level of Medical Decision Making, Per Day, If Using Time, 50 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 173 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 477 | 120 |
| Amlodipine Besylate | 431 | 95 |
| Furosemide | 323 | 78 |
| Potassium Chloride | 309 | 68 |
| Levothyroxine Sodium | 304 | 58 |
| Simvastatin | 275 | 58 |
| Metformin Hcl | 260 | 60 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$990 across 47 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-10-04
- Last updated
- 2020-10-06
- Certified
- 2020-10-06
Frequently asked questions
- What is Sean Callahan's NPI number?
- Sean Callahan's National Provider Identifier (NPI) is 1194811828, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sean Callahan's specialty?
- Sean Callahan is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Sean Callahan located?
- Sean Callahan's practice location on file with NPPES is 11697 W State Route 163, Oak Harbor, OH 43449.
- What is Sean Callahan's phone number?
- The practice phone number listed in the NPPES registry for Sean Callahan is (419) 898-0993.
- Does Sean Callahan accept Medicare?
- Sean Callahan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sean Callahan's NPI active?
- Yes — Sean Callahan's NPI (1194811828) is active in the NPPES registry as of the last update on 2020-10-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.