Samuel Johnson, MD
NPI 1225255128 · Nephrology Physician · Marietta, GA
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Samuel Johnson, MD is a Nephrology Physician provider in Marietta, GA (NPI 1225255128).
Provider details
- NPI number
- 1225255128
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 54909 (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
3,755 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 769 | $79 |
| Manual Urinalysis Test With Examination Using Microscope, Non-Automated81000 | 259 | $4 |
| Use of a Drug to Induce Depression of Consciousness By Physician Performing a Procedure (5 Years Or Older), Initial 15 Minutes99152 | 248 | $12 |
| Ultrasonic Guidance for Blood Vessel Access76937 | 246 | $14 |
| Dialysis Services, 4 Or More Physician Visits Per Month (20 Years Or Older)90960 | 213 | $355 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 196 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 38 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 104 | 37 |
| Furosemide | 97 | 36 |
| Nifedipinebrand: Nifedipine Er | 77 | 23 |
| Losartan Potassium | 69 | 28 |
| Carvedilol | 65 | 21 |
| Allopurinol | 57 | 20 |
| Torsemide | 53 | 20 |
| Lisinopril |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$448 across 20 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
- 2007-04-20
- Last updated
- 2019-08-01
Frequently asked questions
- What is Samuel Johnson's NPI number?
- Samuel Johnson's National Provider Identifier (NPI) is 1225255128, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Samuel Johnson's specialty?
- Samuel Johnson is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Samuel Johnson located?
- Samuel Johnson's practice location on file with NPPES is 55 Whitcher St Ne, Marietta, GA 30060-1155.
- What is Samuel Johnson's phone number?
- The practice phone number listed in the NPPES registry for Samuel Johnson is (770) 427-7389.
- Does Samuel Johnson accept Medicare?
- Samuel Johnson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Samuel Johnson's NPI active?
- Yes — Samuel Johnson's NPI (1225255128) is active in the NPPES registry as of the last update on 2019-08-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.