Keith Guest, M.D.
NPI 1285630020 · Geriatric Medicine (Internal Medicine) Physician · Lexington, SC
Enrolled with Medicare as Practitioner - Geriatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Keith Guest, M.D. is a Geriatric Medicine (Internal Medicine) Physician provider in Lexington, SC (NPI 1285630020).
Provider details
- NPI number
- 1285630020
- Entity type
- Individual
- Primary specialty
- Geriatric Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 20934 (SC)
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 tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
677 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) |
|---|---|---|
| Residence Visit for Established Patient With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 40 Minutes99349 | 276 | $120 |
| Residence Visit for Established Patient With Low Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99348 | 93 | $72 |
| Residence Visit for Established Patient With High Level of Medical Decision Making, Per Day, If Using Time, at Least 60 Minutes99350 | 79 | $175 |
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 57 | $101 |
| 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 andG0180 | 46 | $50 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 123 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 513 | 56 |
| Amlodipine Besylate | 422 | 48 |
| Apixabanbrand: Eliquis | 288 | 20 |
| Gabapentin | 253 | 29 |
| Furosemide | 220 | 30 |
| Pantoprazole Sodium | 189 | 23 |
| Famotidine | 186 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-06-27
- Last updated
- 2025-07-21
- Certified
- 2025-07-21
Frequently asked questions
- What is Keith Guest's NPI number?
- Keith Guest's National Provider Identifier (NPI) is 1285630020, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Keith Guest's specialty?
- Keith Guest is listed in the NPPES registry with a primary specialty of Geriatric Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Keith Guest located?
- Keith Guest's practice location on file with NPPES is Po Box 487, Lexington, SC 29071-0487.
- What is Keith Guest's phone number?
- The practice phone number listed in the NPPES registry for Keith Guest is (803) 699-9073.
- Does Keith Guest accept Medicare?
- Keith Guest is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Keith Guest's NPI active?
- Yes — Keith Guest's NPI (1285630020) is active in the NPPES registry as of the last update on 2025-07-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.