DR. IRL BRIAN GREENWELL M.D.
NPI 1043573009
Internal Medicine - Hematology & Oncology in Charleston, SC

Q: What is Irl Greenwell's NPI number?

The NPI number for Irl Greenwell is 1043573009. It was assigned to this individual provider in the NPPES registry on June 24, 2012.

Q: What is Irl Greenwell's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.

Q: When was this NPI record last updated?

The NPPES record for Irl Greenwell was last updated on January 4, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 22 months 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.

Active since June 24, 2012PECOS EnrolledAccepts Medicare Assignment

2085 HENRY TECKLENBURG DR, CHARLESTON, SC 29414(843) 577-6957(843) 577-6523 Get Directions Write a Review

NPPES record last updated: January 4, 2025. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Jan 4, 2025, Jun 18, 2024, Mar 2, 2022 and 1 more (4 updates tracked since 2018).

On this page

About Dr. Irl Brian Greenwell M.d. NPPES

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

DR. IRL BRIAN GREENWELL M.D. (NPI 1043573009) is an individual hematology & oncology provider in Charleston, South Carolina, licensed in South Carolina (52275) and active in the NPI registry since June 2012. He is enrolled in Medicare PECOS, is affiliated with Musc Medical Center, and is a graduate of Medical University Of South Carolina College Of Medicine (2012).

NPPES Registry Identity

NPI1043573009

Entity TypeIndividualMale

Primary Taxonomy207RH0003X

Provider Legal NameDR. IRL BRIAN GREENWELLCredential: M.D.

Location Address2085 HENRY TECKLENBURG DRCharleston, SC 29414-7710

Mailing AddressPo Box 751874Charlotte, NC 28275-1874 · (843) 402-5200 · Fax (843) 402-5296

Phone(843) 577-6957

Fax(843) 577-6523

Sole ProprietorNo

Medical School CMSMedical University Of South Carolina College Of MedicineGraduated 2012

Enumeration DateJune 24, 2012

Last NPPES UpdateJanuary 4, 20254 updates tracked since enumeration

NPPES CertifiedJanuary 4, 2025

✔ NPI 1043573009 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Hematology & OncologyAllopathic & Osteopathic Physicians

Taxonomy Code207RH0003X

License✔ Licensed in SC · 52275

Definition

An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered.

2085 HENRY TECKLENBURG DR, Charleston, SC 29414

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Other Identifiers 1

Medicaid522759SC

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include BlueCross BlueShield of South Carolina, First Choice Next, Oscar Health Plan of North Carolina, Inc.Insurance ›

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

Dr. Irl Brian Greenwell M.d. 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 ID5597994921

PECOS Enrollment IDI20180815000614

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 Reassignments

Medicare enrollment records show Irl Greenwell reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Bon Secours St. Francis Xavier Hosptial, Inc.

Same address

Hematology & Oncology

2085 HENRY TECKLENBURG DR STE 320
Charleston, SC 29414

Reassigned Medicare billing, South Carolina enrollment
Medicare enrollment name: Bon Secours St Francis Xavier Hospital Inc
129 clinicians in this Medicare group

NPI 1952034183 (843) 763-5104

University Medical Associates

0.4 mi

Multi-Specialty

2125 CHARLIE HALL BLVD, SUITE 100
Charleston, SC 29414

Reassigned Medicare billing, South Carolina enrollment
Medicare enrollment name: University Medical Associates Of The Medical University Of South Carol
2,594 clinicians in this Medicare group

NPI 1760413835 (843) 792-1414

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

Areas of Expertise CMS Part B claims 12

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233

Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.

190 services46 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

61 services33 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

51 services32 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

47 services40 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

46 services46 patients

New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205

This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.

38 services38 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

38 services25 patients

Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223

Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.

28 services26 patients

Hospital discharge day management, more than 30 minutes 99239

Hospital discharge day management over 30 minutes involves a detailed process to ensure a smooth transition from hospital to home. It includes final examinations, discussion of your hospital stay, post-discharge instructions, and coordinating follow-up care.

21 services19 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

20 services17 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

19 services19 patients

Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222

Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.

15 services14 patients

Hospital Affiliations CMS Care Compare 5

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Musc Medical Center

Acute Care Hospitals · Charleston, SC

2/5 CMS rating

OwnershipGovernment - Hospital District or Authority

CMS Certification Number420004

Location169 Ashley AveCharleston, SC 29425 · Charleston County

Emergency services Birthing friendly

Bon Secours-St Francis Xavier Hospital

Acute Care Hospitals · Charleston, SC

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number420065

Location2095 Henry Tecklenburg DriveCharleston, SC 29414 · Charleston County

Emergency services Birthing friendly

Roper Hospital

Acute Care Hospitals · Charleston, SC

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number420087

Location316 Calhoun StCharleston, SC 29401 · Charleston County

Emergency services

Mount Pleasant Hospital

Acute Care Hospitals · Mount Pleasant, SC

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number420104

Location3510 Highway 17 North Suite 140Mount Pleasant, SC 29466 · Charleston County

Emergency services

Roper St Francis Hospital-Berkeley Inc

Acute Care Hospitals · Summerville, SC

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number420110

Location300 Callen BlvdSummerville, SC 29486 · Dorchester County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 29414 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

$95.12 typical visit price

range $16.96 – $133.52

Typical copayment $23.78 (range $4.24 – $33.38)

Most-billed visit code 99214

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.

ROPER SAINT FRANCIS PHYSICIANS NETWORK

Internal Medicine (Pulmonary Disease)

2085 HENRY TECKLENBURG DR, SUITE 320
CHARLESTON, SC 29414

Charleston County (843) 763-3360

CHARLESTON HEMATOLOGY ONCOLOGY ASSOCIATES PA

Internal Medicine (Hematology & Oncology)

2085 HENRY TECKLENBURG DR, 2ND FLOOR
CHARLESTON, SC 29414

Charleston County (843) 577-6957

MR. GEORGE FREDERICK GEILS JR. M.D.

Internal Medicine (Hematology & Oncology)

2085 HENRY TECKLENBURG DR
CHARLESTON, SC 29414

Charleston County (843) 577-6957

ROPER SAINT FRANCIS PHYSICIANS NETWORK

Surgery

2085 HENRY TECKLENBURG DR, SUITE 310
CHARLESTON, SC 29414

Charleston County (843) 266-5500

BON SECOURS ST FRANCIS XAVIER HOSPITAL, INC.

Internal Medicine (Hematology & Oncology)

2085 HENRY TECKLENBURG DR
CHARLESTON, SC 29414

Charleston County (843) 577-6957

DELANEY PATRICE CANTON DNP, FNP

Nurse Practitioner (Family)

2085 HENRY TECKLENBURG DR
CHARLESTON, SC 29414

Charleston County (843) 577-6957

ALEXANDER JON LEVERETT AGACNP

Nurse Practitioner (Acute Care)

2085 HENRY TECKLENBURG DR
CHARLESTON, SC 29414

Charleston County (843) 577-6957

THE CHARLOTTE-MECKLENBURG HOSPITAL AUTHORITY

Internal Medicine (Hematology & Oncology)

2085 HENRY TECKLENBURG DR, SUITE 320
CHARLESTON, SC 29414

Charleston County (864) 724-1912

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 Irl Greenwell's NPI number?

The NPI number for Irl Greenwell is 1043573009. It was assigned to this individual provider in the NPPES registry on June 24, 2012.

Where is Irl Greenwell located?

Irl Greenwell practices at 2085 Henry Tecklenburg Dr, Charleston, SC 29414. The listed phone number is (843) 577-6957.

What is Irl Greenwell's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.

Is Irl Greenwell enrolled in Medicare?

Yes. Irl Greenwell 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 organizations bill Medicare for Irl Greenwell's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Irl Greenwell reassigns Medicare benefits to 2 organizations: Bon Secours St. Francis Xavier Hosptial, Inc. (Charleston, SC) and University Medical Associates (Charleston, SC). Each 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 Irl Greenwell's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Irl Greenwell accept?

Health plans from BlueCross BlueShield of South Carolina, First Choice Next and Oscar Health Plan of North Carolina, Inc list Irl Greenwell as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Irl Greenwell affiliated with any hospitals?

According to CMS data, Irl Greenwell is affiliated with Musc Medical Center, Bon Secours-St Francis Xavier Hospital, Roper Hospital, Mount Pleasant Hospital and Roper St Francis Hospital-Berkeley Inc.

When was this NPI record last updated?

The NPPES record for Irl Greenwell was last updated on January 4, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 22 months 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.