CASEY M MCMILLAN MD
NPI 1861526790
Internal Medicine in Columbia, SC

Q: What is Casey Mcmillan's NPI number?

The NPI number for Casey Mcmillan is 1861526790. It was assigned to this individual provider in the NPPES registry on March 15, 2007.

Q: What is Casey Mcmillan's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Q: When was this NPI record last updated?

The NPPES record for Casey Mcmillan was last updated on August 21, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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 March 15, 2007PECOS EnrolledAccepts Medicare Assignment

87.81/100

CMS Quality Rating

111 DOCTOR CIR, COLUMBIA, SC 29203(800) 491-0909 Get Directions Write a Review

NPPES record last updated: August 21, 2025. Verified against the NPPES registry weekly; last sync: November 01, 2026.

On this page

About Casey M Mcmillan Md NPPES

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

CASEY M MCMILLAN MD (NPI 1861526790) is an individual internal medicine provider in Columbia, South Carolina, licensed in South Carolina (26958) and active in the NPI registry since March 2007. He is enrolled in Medicare PECOS, maintains a secondary practice location in St Augustine, and is a graduate of Medical College Of Georgia School Of Medicine (2004).

NPPES Registry Identity

NPI1861526790

Entity TypeIndividualMale

Primary Taxonomy207R00000X

Provider Legal NameCASEY M MCMILLANCredential: MD

Location Address111 DOCTOR CIRColumbia, SC 29203-6502

Mailing Address111 Doctor CirColumbia, SC 29203-6502 · (800) 491-0909

Phone(800) 491-0909

Sole ProprietorNo

Medical School CMSMedical College Of Georgia School Of MedicineGraduated 2004

Enumeration DateMarch 15, 2007

Last NPPES UpdateAugust 21, 2025

NPPES CertifiedAugust 21, 2025

✔ NPI 1861526790 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207R00000X

Licenses✔ Licensed in SC · 26958✔ Licensed in GA · 89586

Definition

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

Also ListedPediatricsTaxonomy 208000000X · License 26958 (SC)

111 DOCTOR CIR, Columbia, SC 29203

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Secondary Practice Location 1

Location 11301 Plantation Island Dr SSt Augustine, FL 32080-3108 · Phone (800) 491-0909

Other Identifiers 1

Medicaid269587SC

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include BlueCross BlueShield of South Carolina, Molina Healthcare.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

Casey M Mcmillan 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 ID5698838738

PECOS Enrollment IDI20090115000192, I20221229002034, I20250924001585

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 Casey Mcmillan reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Sc House Calls Inc

Same address

Family Medicine

111 DOCTOR CIR
Columbia, SC 29203

Reassigned Medicare billing, Georgia and South Carolina enrollments
139 clinicians in this Medicare group

NPI 1518048859 (800) 491-0909

Apogee Medical Group, South Carolina, P.C.

1.7 mi

Internal Medicine

2435 FOREST DR
Columbia, SC 29204

Reassigned Medicare billing, South Carolina enrollment
Medicare enrollment name: Apogee Medical Group South Carolina
209 clinicians in this Medicare group

NPI 1619028545 (803) 256-5855

The Regional Medical Center Of Orangeburg And Calhoun Counties

36 mi

Hospitalist

3000 ST. MATTHEWS ROAD
Orangeburg, SC 29118

Reassigned Medicare billing, South Carolina enrollment
94 clinicians in this Medicare group

NPI 1003889676 (803) 395-2200

Sound Physicians Of South Carolina, LLC

52 mi

Hospitalist

302 UNIVERSITY PKWY
Aiken, SC 29801

Reassigned Medicare billing, South Carolina enrollment
117 clinicians in this Medicare group

NPI 1922428358 (803) 641-5000

Cogent Healthcare Of Georgia PC

173 mi

Internal Medicine

400 CHARTER BLVD
Macon, GA 31210

Reassigned Medicare billing, South Carolina enrollment
268 clinicians in this Medicare group

NPI 1609827823 (478) 757-8200

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.

Complex chronic care management services for two or more chronic conditions, each additional 60 minutes of clinical staff time directed by health care professional, per calendar month 99489

Complex chronic care management is a service for patients with multiple chronic conditions. It involves an additional 60 minutes per month of clinical staff time directed by a healthcare professional. This service assists in managing your health conditions effectively.

9,554 services459 patients

Complex chronic care management services for two or more chronic conditions, first 60 minutes of clinical staff time directed by health care professional, per calendar month 99487

Complex chronic care management is a service for patients with two or more long-term health conditions. It involves a healthcare professional directing clinical staff in providing care for the first 60 minutes each month. This helps manage your health conditions effectively.

1,579 services469 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.

363 services248 patients

Chronic care management services for two or more chronic conditions, additional 20 minutes of clinical staff time directed by health care professional, per calendar month 99439

Chronic Care Management services involve regular check-ins with healthcare professionals to manage two or more chronic conditions. It includes an additional 20 minutes of clinical staff time per month, directed by a healthcare professional, to ensure optimal health management.

293 services116 patients

Care management services for behavioral health conditions, 20 minutes or more clinical staff time directed by health care professional 99484

Care management for behavioral health involves a healthcare professional directing clinical staff to provide you with support for 20 minutes or more. This service can include planning your care, coordinating services, and managing your health conditions to improve your overall well-being.

256 services102 patients

Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month 99490

Chronic care management services involve a healthcare professional directing clinical staff in managing your chronic conditions. This includes the first 20 minutes per month of services like medication management, care coordination, and health monitoring to help improve your health and quality of life.

228 services143 patients

Residence visit for established patient with moderate level of medical decision making, per day, if using time, at least 40 minutes 99349

An established patient home visit is a medical appointment conducted at your home, typically lasting around 40 minutes. This service is ideal for patients who may find it difficult to travel to a healthcare facility. During this visit, a healthcare professional will evaluate your health status, manage your care, and answer any health-related questions you may have.

128 services97 patients

Advance care planning, first 30 minutes 99497

Advance care planning is a process where you discuss your healthcare preferences with your doctor. This conversation, lasting up to 30 minutes, helps ensure your wishes are respected if you're unable to communicate them in the future. It's about your care, your way.

94 services91 patients

Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439

An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.

52 services52 patients

Physician or allowed practitioner certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians and G0180

This is a service where a doctor or authorized practitioner certifies that you require Medicare-covered home health services. They will communicate with the home health agency and review reports on your health status to ensure you receive appropriate care. This does not involve an in-person visit.

42 services40 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.

36 services36 patients

Physician or allowed practitioner re-certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians a G0179

This procedure involves a doctor or approved practitioner reviewing your health status and re-certifying your need for Medicare-covered home health services. It includes communication with the home health agency and assessment of your health reports, even when you're not physically present.

36 services29 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 29203 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

$124.04 typical visit price

range $53.57 – $163.84

Typical copayment $31.01 (range $13.39 – $40.96)

Most-billed visit code 99204

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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

87.81/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Individually scored

Quality

82.36

Promoting Interoperability

Improvement Activities

Reported Quality Measures

e-Prescribing

94%147 patients2/55-star benchmark: 100%

Provide Patients Electronic Access to Their Health Information

27%656 patients1/55-star benchmark: 100%

Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

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.

LAKETA D RILEY APRN

Nurse Practitioner (Psychiatric/Mental Health)