Casey Mcmillan, MD
NPI 1861526790 · Internal Medicine Physician · Columbia, SC
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Casey Mcmillan, MD is a Internal Medicine Physician provider in Columbia, SC (NPI 1861526790).
Provider details
- NPI number
- 1861526790
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 89586 (GA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 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
12,914 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) |
|---|---|---|
| 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 Month99489 | 9,554 | $69 |
| 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 Month99487 | 1,579 | $128 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 363 | $120 |
| Chronic Care Management Services for Two Or More Chronic Conditions, Additional 20 Minutes of Clinical Staff Time Directed By Health Care Professional, Per Calendar Month99439 | 293 | $46 |
| Care Management Services for Behavioral Health Conditions, 20 Minutes Or More Clinical Staff Time Directed By Health Care Professional99484 | 256 | $53 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 15 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 122 | 40 |
| Atorvastatin Calcium | 31 | 17 |
| Gabapentin | 24 | 14 |
| Oxycodone Hcl/Acetaminophenbrand: Oxycodone-Acetaminophen | 21 | — |
| Levothyroxine Sodium | 20 | — |
| Furosemide | 19 | 12 |
Practice location
Mailing address
Additional practice locations (1)
- 1301 Plantation Island Dr SSt Augustine, FL 32080-3108Phone: (800) 491-0909
Registry dates
- Enumerated
- 2007-03-15
- Last updated
- 2025-08-21
- Certified
- 2025-08-21
Frequently asked questions
- What is Casey Mcmillan's NPI number?
- Casey Mcmillan's National Provider Identifier (NPI) is 1861526790, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Casey Mcmillan's specialty?
- Casey Mcmillan is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Casey Mcmillan located?
- Casey Mcmillan's practice location on file with NPPES is 111 Doctor Cir, Columbia, SC 29203-6502.
- What is Casey Mcmillan's phone number?
- The practice phone number listed in the NPPES registry for Casey Mcmillan is (800) 491-0909.
- Does Casey Mcmillan accept Medicare?
- Casey Mcmillan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Casey Mcmillan's NPI active?
- Yes — Casey Mcmillan's NPI (1861526790) is active in the NPPES registry as of the last update on 2025-08-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.