John W. Gnann, MD
Infectious Disease Physician · Charleston, SC
John W. Gnann, MD is an infectious disease physician with a practice address in Charleston, South Carolina, and NPI 1467498659, issued on Jun 22, 2006. Check the license (South Carolina AL35447, as entered in NPPES) on the South Carolina Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- John W. Gnann
- Credential
- MD
- Primary taxonomy
- Infectious Disease Physician 207RI0200X
- License numbers
- AL35447 SC
08890 AL
Self-reported in NPPES; status is on the state search - Practice location
- 171 Ashley Ave, Charleston, SC 29425
- Phone
- (843) 792-1414
- Enumerated
- Jun 22, 2006
- Record last updated
- Oct 22, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicaid ID
- 000080315 AL
- Medicare enrollment
- Enrolled (PECOS I20130327000529); accepts Medicare assignment
- Medical or professional school
- Duke University School Of Medicine, 1978
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest infectious disease physician records → All 119 in South Carolina → Look up another NPI →
Also registered at 171 Ashley Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Andrea Abbott, MDSurgical Oncology Physician1245473354
- Miguel Abboud, MDPediatric Hematology & Oncology Physician1619292851
- Ahmed Abdelkader, MD, PHDNephrology Physician1629743000
- Mohamed Abdelwahab, MDOtolaryngology Physician1528679768
- Anne Abel, MDChild Abuse Pediatrics Physician1043328990
- Christina Abrams, M.D.Pediatric Hematology & Oncology Physician1376920207
Verify John W. Gnann in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersSouth Carolina Board of Medical Examiners
Search for license AL35447Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average infectious disease physician in 2024
25 Medicare Part D claims, against an average of 689 among the 7,388 providers of this specialty who prescribed in Part D.
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.
Industry payments in 2024: $7,500.00
1 payment: consulting fee; the largest payer was BioCryst Pharmaceuticals, Inc. The 3,895 providers of this specialty with any payment received $4,362.19 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 one group practice
- University Medical Associates OF The Medical University OF South CarolCharleston, SC
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John W. Gnann among 119 infectious disease physician records in South Carolina
John W. Gnann, MD is one of 119 infectious disease physician records with a practice address in South Carolina. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 8% of them.
- NPI issued2006 · 8% of these records are older, 59% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 75% of these records are
- Graduated1978 · median 2005 among the 89 with a school on file
- Record last updated2020 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RI0200X and a South Carolina practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Infectious Disease Physician providers in South Carolina
There are 119 infectious disease physician records in South Carolina.
All 119 in South Carolina → Every provider in Charleston → Infectious Disease Physician nationwide →
The 8 infectious disease physician records with the nearest ZIP codes
- Joseph Cantey, MDCharleston, SC 294251073621926
- L.w. Church, MDCharleston, SC 294251033227087
- Scott Curry, M.D.Charleston, SC 294251982806063
- Victor Del Bene, MDCharleston, SC 294251700994654
- Susan Dorman, M.D.Charleston, SC 294251134169253
- Evgenia Kagan, M.D.Charleston, SC 294251578759502
- Jessica Lewis, M.D.Charleston, SC 294251205095726
- Camelia Marculescu, MDCharleston, SC 294251477661338
Common questions
What is John W. Gnann, MD's NPI number?
John W. Gnann, MD's National Provider Identifier (NPI) is 1467498659, issued on Jun 22, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John W. Gnann, MD located?
The NPPES record lists a practice address at 171 Ashley Ave, Charleston, SC, 29425. Phone: (843) 792-1414. Providers update this record themselves, so call before visiting.
How can I verify John W. Gnann, MD's license?
NPPES lists South Carolina license number AL35447, as entered by the provider. Search the South Carolina Board of Medical Examiners at https://verify.llronline.com/LicLookup/Med/Med.aspx?div=22. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John W. Gnann, MD prescribe under Medicare Part D?
In 2024, John W. Gnann, MD had 25 Medicare Part D claims; the average among infectious disease physician prescribers was 689. Part D covers Medicare prescriptions only.
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.