John Steven Lammert, MD
NPI 1699727909ActiveIndividual· Internal Medicine· Woodstock, GA
Internal Medicine (MD) in Woodstock, Georgia, trained at Medical College of Georgia School of Medicine (class of 1989). Their prescriptions cost Medicare Part D more than their services did: $214,572 for 4,261 claims, against $70,318 paid for services in 2024. Abbott Laboratories was the largest of 3 companies reporting payments in 2025, $52.05 in all, mostly food and beverage.
Overview
| NPI | 1699727909 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | May 16, 2006 |
| Last updated in NPPES | Oct 17, 2025 |
| Certified by provider | Oct 17, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 33619 | GA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Internal Medicine (GA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 355 |
|---|---|
| Services billed | 1,086 across 29 procedure codes |
| Paid by Medicare | $70,318 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,261 · 11,066 30-day fills |
|---|---|
| Patients | 577 |
| Total drug cost | $214,572 |
| Generic share | 90% of claims |
Education and affiliations
| Medical school | Medical College of Georgia School of Medicine |
|---|---|
| Graduation year | 1989 |
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Perimeter Professional Services, LLCAlpharetta, GA · 21 clinicians
Hospital affiliations
- Northside Hospital CherokeeCanton, GA
- Wellstar Kennestone Regional Medical CenterMarietta, GA
Other facilities
- Wellstar Windy Hill HospitalLong-term care hospital · Marietta, GA
Industry payments (Open Payments)
- 2025$52.05 · 3 payments from 3 companies
- 2024$136.91 · 8 payments from 6 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbott Laboratories | $19.34 | 1 |
| Lilly USA, LLC | $18.33 | 1 |
| Pfizer Inc. | $14.38 | 1 |
What the 2025 payments were for
- Food and Beverage$52.05 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 27 internal medicine physicians in Woodstock · All internal medicine physicians in Georgia