Calvert Warren, MD
NPI 1083727846 · Psychiatry Physician · Greenville, SC
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Calvert Warren, MD is a Psychiatry Physician provider in Greenville, SC (NPI 1083727846).
Provider details
- NPI number
- 1083727846
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 188710-1 (NY)
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 tenure33% of score
19 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 12 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Paliperidone Palmitatebrand: Invega Sustenna | 35 |
| Hydroxyzine Hcl | 31 |
| Olanzapine | 28 |
| Lorazepam | 27 |
| Metformin Hcl | 23 |
| Valproic Acid (as Sodium Salt)brand: Valproic Acid | 18 |
| Levothyroxine Sodium | 17 |
| Amlodipine Besylate | 16 |
| Clonazepam | 15 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$17 across 1 record (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
- 2006-08-16
- Last updated
- 2020-09-30
- Certified
- 2020-09-30
Frequently asked questions
- What is Calvert Warren's NPI number?
- Calvert Warren's National Provider Identifier (NPI) is 1083727846, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Calvert Warren's specialty?
- Calvert Warren is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Calvert Warren located?
- Calvert Warren's practice location on file with NPPES is 701 Grove Rd, Greenville, SC 29605-4210.
- What is Calvert Warren's phone number?
- The practice phone number listed in the NPPES registry for Calvert Warren is (864) 455-8431.
- Does Calvert Warren accept Medicare?
- Calvert Warren is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Calvert Warren's NPI active?
- Yes — Calvert Warren's NPI (1083727846) is active in the NPPES registry as of the last update on 2020-09-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.