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CALVERT GLENDON WARREN MD
NPI 1083727846
Psychiatry & Neurology - Psychiatry in Greenville, SC

Active since August 16, 2006PECOS EnrolledAccepts Medicare Assignment
701 GROVE RD, SUITE 200, GREENVILLE, SC 29605(864) 455-8431(864) 455-8981 Get Directions Write a Review

NPPES record last updated: September 30, 2020. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Calvert Glendon Warren Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

CALVERT GLENDON WARREN MD (NPI 1083727846) is an individual psychiatry provider in Greenville, South Carolina, licensed in South Carolina (36535) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS and is a graduate of University Of Rochester School Of Medicine And Dentistry (1990).

NPPES Registry Identity

NPI1083727846
Entity TypeIndividualMale
Primary Taxonomy2084P0800X
Provider Legal NameCALVERT GLENDON WARRENCredential: MD
Location Address701 GROVE RD, SUITE 200Greenville, SC 29605-4210
Mailing Address130 Highway 252Anderson, SC 29621-5054 · (864) 797-6044 · Fax (864) 797-6198
Phone(864) 455-8431
Fax(864) 455-8981
Sole ProprietorNo
Medical School CMSUniversity Of Rochester School Of Medicine And DentistryGraduated 1990
Enumeration DateAugust 16, 2006
Last NPPES UpdateSeptember 30, 2020
NPPES CertifiedSeptember 30, 2020
✔ NPI 1083727846 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · PsychiatryAllopathic & Osteopathic Physicians
Taxonomy Code2084P0800X
Licenses✔ Licensed in SC · 36535✔ Licensed in NY · 188710-1
Definition
A Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.
701 GROVE RD, Greenville, SC 29605
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Other Identifiers 1

Medicaid01499903NY

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Calvert Glendon Warren Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID3870781909
PECOS Enrollment IDI20140703001429
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Calvert Warren reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

South Carolina Dept Of Mental Health Accounting Office
24 mi
Mental Health (Including Community Mental Health Center)
1 LINWA BLVD
Anderson, SC 29621
  • Reassigned Medicare billing, South Carolina enrollment
  • Also billed through NPI 1376595041 (South Carolina)
  • 236 clinicians in this Medicare group
NPI 1508814625 (864) 260-2220

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 29605 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$163.84 typical visit price
range $53.57 – $163.84
Typical copayment $40.96 (range $13.39 – $40.96)
Most-billed visit code 99205
Established Patient
$67.12 typical visit price
range $16.96 – $133.52
Typical copayment $16.78 (range $4.24 – $33.38)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DANIEL RUIZ
Internal Medicine
701 GROVE RD
GREENVILLE, SC 29605
Greenville County (864) 455-7882
ALAN ROBERT THOMPSON MD
Hospitalist
701 GROVE RD, 5TH FLOOR
GREENVILLE, SC 29605
Greenville County (864) 455-4411
GEORGE R SWEET CRNA
Nurse Anesthetist, Certified Registered
701 GROVE RD, ANESTHESIA DEPT
GREENVILLE, SC 29605
Greenville County (864) 455-7111
CRAIG DOUGLAS YOUNG PHD
Clinical Neuropsychologist
701 GROVE RD
GREENVILLE, SC 29605
Greenville County (864) 455-7000
JENNIFER WEBB GEORGE CRNA
Nurse Anesthetist, Certified Registered
701 GROVE RD
GREENVILLE, SC 29605
Greenville County (864) 455-7111
MEENU MARIE VARGHESE D.O.
Internal Medicine
701 GROVE RD, 5TH FLOOR SUPPORT TOWER
GREENVILLE, SC 29605
Greenville County (864) 455-7882
AMANDA TIPTON LARSON CRNA
Nurse Anesthetist, Certified Registered
701 GROVE RD
GREENVILLE, SC 29605
Greenville County (864) 522-2286
TYLER WITHROW
Nurse Anesthetist, Certified Registered
701 GROVE RD
GREENVILLE, SC 29605
Greenville County (864) 455-7000

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Calvert Warren's NPI number?

The NPI number for Calvert Warren is 1083727846. It was assigned to this individual provider in the NPPES registry on August 16, 2006.

Where is Calvert Warren located?

Calvert Warren practices at 701 Grove Rd Suite 200, Greenville, SC 29605. The listed phone number is (864) 455-8431.

What is Calvert Warren's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

Is Calvert Warren enrolled in Medicare?

Yes. Calvert Warren is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organization bills Medicare for Calvert Warren's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Calvert Warren reassigns Medicare benefits to South Carolina Dept Of Mental Health Accounting Office (Anderson, SC). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Calvert Warren's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Calvert Warren was last updated on September 30, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.