Michael Callahan, M.D.
NPI 1063564243 · Otolaryngic Allergy Physician · Gainesville, GA
Enrolled with Medicare as Practitioner - Otolaryngology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Michael Callahan, M.D. is a Otolaryngic Allergy Physician provider in Gainesville, GA (NPI 1063564243).
Provider details
- NPI number
- 1063564243
- Entity type
- Individual
- Primary specialty
- Otolaryngic Allergy PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 045050 (GA)
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
1,345 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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 334 | $85 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 210 | $103 |
| Diagnostic Exam of Voice Box Using a Flexible Endoscope31575 | 156 | $116 |
| Diagnostic Exam of Nasal Passages Using an Endoscope31231 | 147 | $168 |
| Test to Assess Middle Ear Function92567 | 123 | $15 |
| Removal of Impacted Ear Wax69210 | 86 | $40 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 14 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Ipratropium Bromide | 111 | 57 |
| Fluticasone Propionate | 76 | 45 |
| Azelastine Hcl | 64 | 41 |
| Famotidine | 40 | 30 |
| Ofloxacin | 32 | 28 |
| Mometasone Furoate | 28 | 25 |
| Tobramycin/Dexamethasonebrand: Tobramycin-Dexamethasone | 25 | 17 |
| Prednisone |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$230 across 5 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
- 2007-01-17
- Last updated
- 2011-10-04
Frequently asked questions
- What is Michael Callahan's NPI number?
- Michael Callahan's National Provider Identifier (NPI) is 1063564243, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Callahan's specialty?
- Michael Callahan is listed in the NPPES registry with a primary specialty of Otolaryngic Allergy Physician (Allopathic & Osteopathic Physicians).
- Where is Michael Callahan located?
- Michael Callahan's practice location on file with NPPES is 584 Lanier Park Dr, Gainesville, GA 30501-2000.
- What is Michael Callahan's phone number?
- The practice phone number listed in the NPPES registry for Michael Callahan is (770) 534-5208.
- Does Michael Callahan accept Medicare?
- Michael Callahan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Michael Callahan's NPI active?
- Yes — Michael Callahan's NPI (1063564243) is active in the NPPES registry as of the last update on 2011-10-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.