Alexander Lemmer, M.D.
Alexander Lemmer, M.D. is a Transplant Hepatology Physician in Atlanta, GA, registered under NPI 1104168681. This provider registers 4 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
The practice address on file is 1968 PEACHTREE RD NW BLDG 77, 5TH FLR, Atlanta, GA 30309. We have not yet mapped what surrounds this office — parking, transit, and nearby pharmacies are added as our data collection reaches each location.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| 84644 | GA | Transplant Hepatology Physician primary |
| 84644 | GA | Internal Medicine Physician |
| 036.139115 | IL | Internal Medicine Physician |
| 84644 | GA | Gastroenterology Physician |
| 84644 | GA | Hepatology Physician |
Licences are recorded in 2 states: GA, IL. Providers licensed in several states often practise near a state border or deliver telehealth across state lines.
- Status
- Approved
- Provider type
- Practitioner - Internal Medicine
- PAC ID
- 6406150481
Medicare enrolment is recorded as approved under the provider type Practitioner - Internal Medicine. This means the provider is enrolled to bill Medicare, though it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
Licensed in 2 states
This provider holds licences in 2 states: Georgia and Illinois. The practice address on file is in Atlanta, GA, but a licence in another state usually means they see patients there too — either at a second location or by telehealth. If the address above is far from you, it is worth calling to ask whether they practise closer to where you live.
- Licence
- 84644
- Specialty
- Transplant Hepatology Physician
Licence numbers are self-reported to NPPES at registration. They do not confirm a licence is currently active, in good standing, or valid for the specialty shown — only the state board can tell you that, which is why we link to each one.
What Transplant Hepatology covers
An internist with special knowledge and the skill required of a gastroenterologist to care for patients prior to and following hepatic transplantation that spans all phases of liver transplantation. Selection of appropriate recipients requires assessment by a team having experience in evaluating the severity and prognosis of patients with liver disease. NUCC Health Care Provider Taxonomy, code 207RT0003X
All registered taxonomy codes
This provider registers 5 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 207RT0003X | Transplant Hepatology Physician Transplant Hepatology | 84644 | GA | primary |
| 207R00000X | Internal Medicine Physician | 84644 | GA | |
| 207R00000X | Internal Medicine Physician | 036.139115 | IL | |
| 207RG0100X | Gastroenterology Physician Gastroenterology | 84644 | GA | |
| 207RI0008X | Hepatology Physician Hepatology | 84644 | GA |
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.
| NPI | 1104168681 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Mar 21, 2013 |
| Last updated | Jul 24, 2020 |
| Status | Active |
| Sole proprietor | No |
| Credential | M.D. |
| Practice address |
1968 PEACHTREE RD NW BLDG 77, 5TH FLR Atlanta, GA 30309 (404) 605-4600 |
| Mailing address |
201 E HURON GALTER 3-150 Chicago, IL 60611 |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 1 | 0 | 4 | 1 | 6 | 8 | 6 | 8 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 1 | 0 | 4 | 2 | 6 | 7 | 6 | 7 |
Sum = 59 · next multiple of 10 = 60 · check digit = 1 · actual last digit = 1
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.