Melissa Marshall, CAPN, RN
NPI 1558593392 · Psychiatric/Mental Health Nurse Practitioner · Charleston, SC
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Melissa Marshall, CAPN, RN is a Psychiatric/Mental Health Nurse Practitioner provider in Charleston, SC (NPI 1558593392).
Provider details
- NPI number
- 1558593392
- Entity type
- Individual
- Primary specialty
- Psychiatric/Mental Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- CAPN, RN
- Sex
- Female
- Sole proprietor
- Yes
- License
- 21718 (SC)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Nursing Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
16 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
224 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 99 | $97 |
| Psychotherapy With Evaluation and Management Visit, 30 Minutes90833 | 94 | $55 |
| Psychotherapy With Evaluation and Management Visit, 45 Minutes90836 | 18 | $74 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 13 | $133 |
Typical Medicare-allowed amounts for these services range $55–$133 (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 · 17 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Alprazolam | 61 | 13 |
| Escitalopram Oxalate | 43 | 15 |
| Quetiapine Fumarate | 40 | — |
| Clonazepam | 38 | — |
| Trazodone Hcl | 36 | 11 |
| Duloxetine Hcl | 35 | — |
| Lamotrigine | 26 |
Practice location
Mailing address
Additional practice locations (1)
- 2215 Hualapai Mountain RdSiutes H and IKingman, AZ 86401-8324Phone: (928) 753-9387Fax: (928) 753-9404
Registry dates
- Enumerated
- 2009-08-12
- Last updated
- 2023-06-30
- Certified
- 2023-06-30
Frequently asked questions
- What is Melissa Marshall's NPI number?
- Melissa Marshall's National Provider Identifier (NPI) is 1558593392, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Melissa Marshall's specialty?
- Melissa Marshall is listed in the NPPES registry with a primary specialty of Psychiatric/Mental Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Melissa Marshall located?
- Melissa Marshall's practice location on file with NPPES is 109 Bee St, Charleston, SC 29401-5703.
- What is Melissa Marshall's phone number?
- The practice phone number listed in the NPPES registry for Melissa Marshall is (843) 577-5011.
- Does Melissa Marshall accept Medicare?
- Melissa Marshall is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Melissa Marshall's NPI active?
- Yes — Melissa Marshall's NPI (1558593392) is active in the NPPES registry as of the last update on 2023-06-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.