Marsha Johnson Williams, M.D., MSCR
NPI 1104112606 · Internal Medicine Physician · Charleston, SC
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marsha Johnson Williams, M.D., MSCR is a Internal Medicine Physician provider in Charleston, SC (NPI 1104112606).
Provider details
- NPI number
- 1104112606
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D., MSCR
- Sex
- Female
- Sole proprietor
- No
- License
- 0101255624 (SC)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
14 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
826 Medicare services, 2024 (ranked within specialty)
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 methodology.
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 | 441 | $74 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 243 | $111 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 131 | $107 |
| Hospital Discharge Day Management, 30 Minutes Or Less99238 | 11 | $76 |
Typical Medicare-allowed amounts for these services range $74–$111 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 7 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Cefdinir | 30 | 30 |
| Prednisone | 25 | 25 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 16 | 16 |
| Amlodipine Besylate | 15 | — |
| Azithromycin | 14 | 14 |
| Pantoprazole Sodium | 12 | — |
| Furosemide | 11 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2011-06-22
- Last updated
- 2020-03-12
- Certified
- 2020-03-12
Frequently asked questions
- What is Marsha Johnson Williams's NPI number?
- Marsha Johnson Williams's National Provider Identifier (NPI) is 1104112606, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marsha Johnson Williams's specialty?
- Marsha Johnson Williams is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Marsha Johnson Williams located?
- Marsha Johnson Williams's practice location on file with NPPES is 109 Bee St, Charleston, SC 29401-5703.
- What is Marsha Johnson Williams's phone number?
- The practice phone number listed in the NPPES registry for Marsha Johnson Williams is (843) 577-5011.
- Does Marsha Johnson Williams accept Medicare?
- Marsha Johnson Williams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marsha Johnson Williams's NPI active?
- Yes — Marsha Johnson Williams's NPI (1104112606) is active in the NPPES registry as of the last update on 2020-03-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.