Michael Harris Callahan, M.D.
Otolaryngic Allergy Physician · Gainesville, GA
Michael Harris Callahan, M.D. is an otolaryngic allergy physician with a practice address in Gainesville, Georgia, and NPI 1063564243, issued on Jan 17, 2007. Check the license (Georgia 045050, as entered in NPPES) on the Georgia Composite Medical Board; the Medicare figures below come from public CMS files.
- Name
- Michael Harris Callahan
- Credential
- M.D.
- Primary taxonomy
- Otolaryngic Allergy Physician 207YX0602X
- License number
- 045050 GA
Self-reported in NPPES; status is on the state search - Practice location
- 584 Lanier Park Dr, Gainesville, GA 30501
- Phone
- (770) 534-5208
- Enumerated
- Jan 17, 2007
- Record last updated
- Oct 4, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (770) 534-8512
- Medicaid ID
- 00906386A GA
- Medicare enrollment
- Enrolled (PECOS I20110627000433); accepts Medicare assignment
- Medical or professional school
- Medical College Of Georgia School Of Medicine, 1996
- Entity
- Type 1 · individual
8 nearest otolaryngic allergy physician records → All 11 in Georgia → Look up another NPI →
Also registered at 584 Lanier Park Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Folake Aminu, M.D.Family Medicine Physician1285805986
- Ronald Whitmire, M.D.Otolaryngic Allergy Physician1659423838
Verify Michael Harris Callahan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersGeorgia Composite Medical Board
Search for license 045050Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
30% fewer Medicare Part D claims than the average otolaryngic allergy physician in 2024
606 Medicare Part D claims for 317 beneficiaries, against an average of 867 among the 91 providers of this specialty who prescribed in Part D. Brand-name drugs were 4% of claims.
Most prescribed
- Ipratropium Bromide111 claims
- Fluticasone Propionate76 claims
- Azelastine Hcl64 claims
- Famotidine40 claims
- Ofloxacin32 claims
- Mometasone Furoate28 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 practice group's MIPS final score for 2023 (Medicare payment program): 87.8 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. 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, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $229.87
5 payments; by number, the most common kind was food and beverage; the largest payer was Aerin Medical Inc. The 64 providers of this specialty with any payment received $4,752.63 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Georgialina Physical Therapy Associates LLCAugusta, GA
- Northeast Georgia OtolaryngologyBraselton, GA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michael Harris Callahan among 11 otolaryngic allergy physician records in Georgia
Michael Harris Callahan, M.D. is one of 11 otolaryngic allergy physician records with a practice address in Georgia. 91% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 36% of them.
- NPI issued2007 · 36% of these records are older, 45% newer
- In a Medicare fileYes · 91% of these records are
- In the CMS Doctors and Clinicians fileYes · 91% of these records are
- Graduated1996 · median 2001 among the 10 with a school on file
- Record last updated2011 · 36% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207YX0602X and a Georgia practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Otolaryngic Allergy Physician providers in Georgia
There are 11 otolaryngic allergy physician records in Georgia.
All 11 in Georgia → Every provider in Gainesville → Otolaryngic Allergy Physician nationwide →
The 8 otolaryngic allergy physician records with the nearest ZIP codes
- Ronald Whitmire, M.D.Gainesville, GA 305011659423838
- David Dillard, MDAthens, GA 306061558327072
- Anthony BotrosAtlanta, GA 303221568091916
- John Delgaudio, M.D.Atlanta, GA 303221104937861
- Sarah Wise, MDAtlanta, GA 303221053348060
- Emily BarrowAtlanta, GA 303081508284597
- Daniel Spielman, MDAtlanta, GA 303081790218097
- Michael Sylvester, MDFayetteville, GA 302141245767383
Common questions
What is Michael Harris Callahan, M.D.'s NPI number?
Michael Harris Callahan, M.D.'s National Provider Identifier (NPI) is 1063564243, issued on Jan 17, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Michael Harris Callahan, M.D. located?
The NPPES record lists a practice address at 584 Lanier Park Dr, Gainesville, GA, 30501. Phone: (770) 534-5208. Providers update this record themselves, so call before visiting.
How can I verify Michael Harris Callahan, M.D.'s license?
NPPES lists Georgia license number 045050, as entered by the provider. Search the Georgia Composite Medical Board at https://medicalboard.georgia.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Michael Harris Callahan, M.D. prescribe under Medicare Part D?
In 2024, Michael Harris Callahan, M.D. had 606 Medicare Part D claims for 317 beneficiaries; the average among otolaryngic allergy physician prescribers was 867. Part D covers Medicare prescriptions only.
What is Michael Harris Callahan, M.D.'s MIPS final score?
The 2023 MIPS final score is 87.8 of 100, reported for the practice group. 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.