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2026 NPPES data Hospice and Palliative Medicine (Internal Medicine) Physician NPI 1285630020 M.D.
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Keith Guest, M.D.

Hospice and Palliative Medicine (Internal Medicine) Physician in Lexington, South Carolina.

This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 1,541 in Hospice and Palliative Medicine (Internal Medicine) Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.

Federal data, no proprietary rating. We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
10K
Medicare Part D claims · 336 beneficiaries · Hospice and Palliative Medicine (Internal Medicine) Physician avg: 1K
Generic prescribing
90%
generic claims · 9% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
64.7/100
▼ 19 pts below national avg 83.5 · Mid-tier
Verify NPI on CMS Methodology
Compiled from official public sources by the editorial process.

What the federal data shows

Keith Guest, M.D. reported a CMS MIPS final score of 64.7/100 - below the 83.5 national average - and filed 10,292 Medicare Part D claims in 2023.

64.7/100
MIPS score · -19 vs avg
10K
Part D claims, 2023
90%
generic prescribing
Likely
board-certified (heuristic)

Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.

CMS NPPES provider registry desk

NPI 1285630020 · Hospice and Palliative Medicine (Internal Medicine) Physician

NPI-10 · ENUM-LEGACY · TAX-NARROW · MIPS-LOW · RX-HEAVY · BOOK-THIN · PHOTO-FINISH

  • NPI-10 1285630020
  • ENUM-LEGACY 2005
  • TAX-NARROW 1,541
  • MIPS-LOW 64.7/100
  • RX-HEAVY 10K claims
  • BOOK-THIN 23 in South Carolina
  • PHOTO-FINISH Christopher Black · ±0.0

MIPS final-score neighbourhood

Same-specialty nationwide peers by CMS final score, not geographic proximity

MIPS pts

What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).

Source CMS Quality Payment Program (MIPS) As of 2023

Keith Guest, M.D.'s MIPS score vs every measured U.S. clinician

CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure. Clinicians whose score CMS assigned without scoring any category are excluded.

65 ≥ 7th percentile 7% of 454,083 measured providers are in lower value bands

0–10: 8,684 measured providers (2%). Below this entry. 10–20: 3,008 measured providers (1%). Below this entry. 20–30: 3,069 measured providers (1%). Below this entry. 30–40: 2,746 measured providers (1%). Below this entry. 40–50: 2,928 measured providers (1%). Below this entry. 50–60: 5,882 measured providers (1%). Below this entry. 60–70: 13,906 measured providers (3%). This entry sits in this band. 70–80: 94,570 measured providers (21%). Above this entry. 80–90: 129,887 measured providers (29%). Above this entry. 90+: 189,403 measured providers (42%). Above this entry. This provider 0 100 every measured MIPS clinician, bucketed by value

Each bar is a band; taller bars hold more measured providers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

The percentile is a conservative whole-score-point band: it counts only measured clinicians in lower score bands. A CMS MIPS metric is not a recommendation or a clinical-quality rating by PlainDoctor. See methodology § corpus placement.

Source CMS Merit-based Incentive Payment System (MIPS) · 2023

Where Keith Guest, M.D. sits

This provider among hospice and palliative medicine (internal medicine) physician peers

Across the 313 hospice and palliative medicine (internal medicine) physician providers who report both Medicare Part D prescribing and a MIPS quality score, Keith Guest, M.D. writes more Part D claims than 98% of them and scores higher on MIPS quality than 4% - placing this provider in the high-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.

Lower volume · High qualityHigh volume · High qualityLower volume · Lower qualityHigh volume · Lower quality0255075100024.448.873.297.7Part D claim volume, percentile in specialtyMIPS quality, percentilePoint, Part D claim volume, percentile in specialty: 2 · MIPS quality, percentile: 75Point, Part D claim volume, percentile in specialty: 55 · MIPS quality, percentile: 42Point, Part D claim volume, percentile in specialty: 93 · MIPS quality, percentile: 83Point, Part D claim volume, percentile in specialty: 85 · MIPS quality, percentile: 93Point, Part D claim volume, percentile in specialty: 32 · MIPS quality, percentile: 80Point, Part D claim volume, percentile in specialty: 48 · MIPS quality, percentile: 63Point, Part D claim volume, percentile in specialty: 58 · MIPS quality, percentile: 93Point, Part D claim volume, percentile in specialty: 65 · MIPS quality, percentile: 38Point, Part D claim volume, percentile in specialty: 22 · MIPS quality, percentile: 93Point, Part D claim volume, percentile in specialty: 8 · MIPS quality, percentile: 28Point, Part D claim volume, percentile in specialty: 40 · MIPS quality, percentile: 18Point, Part D claim volume, percentile in specialty: 60 · MIPS quality, percentile: 58Point, Part D claim volume, percentile in specialty: 57 · MIPS quality, percentile: 42Point, Part D claim volume, percentile in specialty: 17 · MIPS quality, percentile: 75Point, Part D claim volume, percentile in specialty: 78 · MIPS quality, percentile: 48Point, Part D claim volume, percentile in specialty: 42 · MIPS quality, percentile: 27Point, Part D claim volume, percentile in specialty: 33 · MIPS quality, percentile: 20Point, Part D claim volume, percentile in specialty: 8 · MIPS quality, percentile: 12Point, Part D claim volume, percentile in specialty: 98 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 47 · MIPS quality, percentile: 50Point, Part D claim volume, percentile in specialty: 63 · MIPS quality, percentile: 70Point, Part D claim volume, percentile in specialty: 87 · MIPS quality, percentile: 3Point, Part D claim volume, percentile in specialty: 15 · MIPS quality, percentile: 20Point, Part D claim volume, percentile in specialty: 17 · MIPS quality, percentile: 93Point, Part D claim volume, percentile in specialty: 17 · MIPS quality, percentile: 32Point, Part D claim volume, percentile in specialty: 28 · MIPS quality, percentile: 32Point, Part D claim volume, percentile in specialty: 75 · MIPS quality, percentile: 25Point, Part D claim volume, percentile in specialty: 45 · MIPS quality, percentile: 85Point, Part D claim volume, percentile in specialty: 95 · MIPS quality, percentile: 68Point, Part D claim volume, percentile in specialty: 23 · MIPS quality, percentile: 17Point, Part D claim volume, percentile in specialty: 37 · MIPS quality, percentile: 67Point, Part D claim volume, percentile in specialty: 67 · MIPS quality, percentile: 65Point, Part D claim volume, percentile in specialty: 38 · MIPS quality, percentile: 7Point, Part D claim volume, percentile in specialty: 53 · MIPS quality, percentile: 82Point, Part D claim volume, percentile in specialty: 2 · MIPS quality, percentile: 78Point, Part D claim volume, percentile in specialty: 62 · MIPS quality, percentile: 20Point, Part D claim volume, percentile in specialty: 50 · MIPS quality, percentile: 93Point, Part D claim volume, percentile in specialty: 30 · MIPS quality, percentile: 62Point, Part D claim volume, percentile in specialty: 83 · MIPS quality, percentile: 28Point, Part D claim volume, percentile in specialty: 52 · MIPS quality, percentile: 10Point, Part D claim volume, percentile in specialty: 80 · MIPS quality, percentile: 37Point, Part D claim volume, percentile in specialty: 5 · MIPS quality, percentile: 55Point, Part D claim volume, percentile in specialty: 12 · MIPS quality, percentile: 70Point, Part D claim volume, percentile in specialty: 68 · MIPS quality, percentile: 47Point, Part D claim volume, percentile in specialty: 92 · MIPS quality, percentile: 90Point, Part D claim volume, percentile in specialty: 77 · MIPS quality, percentile: 57Point, Part D claim volume, percentile in specialty: 27 · MIPS quality, percentile: 88Point, Part D claim volume, percentile in specialty: 25 · MIPS quality, percentile: 92Point, Part D claim volume, percentile in specialty: 88 · MIPS quality, percentile: 15Point, Part D claim volume, percentile in specialty: 90 · MIPS quality, percentile: 35Point, Part D claim volume, percentile in specialty: 70 · MIPS quality, percentile: 73Point, Part D claim volume, percentile in specialty: 97 · MIPS quality, percentile: 13Point, Part D claim volume, percentile in specialty: 73 · MIPS quality, percentile: 52Point, Part D claim volume, percentile in specialty: 72 · MIPS quality, percentile: 5Point, Part D claim volume, percentile in specialty: 0 · MIPS quality, percentile: 2Point, Part D claim volume, percentile in specialty: 35 · MIPS quality, percentile: 40Point, Part D claim volume, percentile in specialty: 13 · MIPS quality, percentile: 42Point, Part D claim volume, percentile in specialty: 43 · MIPS quality, percentile: 53Point, Part D claim volume, percentile in specialty: 7 · MIPS quality, percentile: 60Point, Part D claim volume, percentile in specialty: 82 · MIPS quality, percentile: 87Keith Guest, M.D., Part D claim volume, percentile in specialty: 98 · MIPS quality, percentile: 4
Part D claim volume vs MIPS quality, by specialty percentile

Each dot is one hospice and palliative medicine (internal medicine) physician peer from a representative sample of 60; the gold marker is Keith Guest, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.

✓
Board certification likely (heuristic, not verified)

Keith Guest, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 1 hospital affiliation - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

What does the federal data show about Keith Guest, M.D.?

Below national average

NPI registry status

Active

Issued 06/27/2005

NPI 1285630020

Primary specialty

Hospice and Palliative Medicine (Internal Medicine) Physician

Niche

1,541 US NPIs in this specialty

Medicare Part D claims

10,292 8× vs specialty avg

2023 prescription claims

Specialty avg: 1,275

MIPS final score

64.7/100 18.8 pts vs avg

Mid-tier band

vs 83.5 national avg

Specialty distribution in South Carolina

How Hospice and Palliative Medicine (Internal Medicine) Physician compares to other specialties among South Carolina providers

South Carolina providers
Pharmacist6.2%Mental Health Counselor5.1%Family Nurse Practitioner4.6%Physical Therapist4.5%Behavior Technician3.8%Speech-Language Pathologist3.7%Hospice and Palliative Medic…0%
Largest specialties in South Carolina (% of in-state providers)

Medicare quality performance, MIPS

Keith Guest, M.D.'s 2023 MIPS final score plotted against the Hospice and Palliative Medicine (Internal Medicine) Physician national average

Below national average
MIPS Final Score
64.7/100
vs 83.5 national avg · 2023 performance year
0%100%National avg84%64.7%
MIPS final score (Hospice and Palliative Medicine (Internal Medicine) Physician) - 64.7/100 vs national avg 83.5
How MIPS and board certification work

The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.

Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).

Practice Address

PO BOX 487
Lexington, SC 29071
(803) 699-9073

Provider Details

NPI 1285630020
Specialty Hospice and Palliative Medicine (Internal Medicine) Physician
Credentials M.D.
Gender Male
NPI Issued 06/27/2005

CMS Quality Score (MIPS)

Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.

64.7135
Final Score
Measured-score avg: 83.5
61.3243
Quality
19.1243
Cost

Reporting: Group practice

Hospital and facility affiliations

Facilities where Keith Guest, M.D. bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.

Senior Health Associates, PA
Beaufort, SC

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

Brand vs generic prescribing mix · Generic-heavy

Keith Guest, M.D. - brand share 9.0%
Hospice and Palliative Medicine (Internal Medicine) Physician average

9% brand-name claims vs 90% generic, on 10,292 2023 Medicare Part D claims.

The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

10,292
Total Claims
$422K
Total Drug Cost
336
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
10,479
Total Day Supply
194,664
Brand vs Generic
9% brand / 90% generic
Brand Drug Cost
$238K
Generic Drug Cost
$176K
Opioid Claims
70 (0.7% rate)
Antibiotic Claims
74

Patient Demographics

Average Patient Age
79.6 years
Avg HCC Risk Score
2.13
Gender Split
68% female / 32% male
Age Distribution
<65: 25, 65-74: 80, 75-84: 113, 85+: 118

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

What Keith Guest, M.D. prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Amlodipine Besylate
 565
Atorvastatin Calcium
 528
Furosemide
 398
Levothyroxine Sodium
 378
Gabapentin
 372
Pantoprazole Sodium
 276
Eliquis
Apixaban
275
Metoprolol Tartrate
 272
Omeprazole
 269
Potassium Chloride
 245

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

More Hospice and Palliative Medicine (Internal Medicine) Physician in SC → All providers in South Carolina → Compare specialties →

Hospice and Palliative Medicine (Internal Medicine) Physician Overview

How Keith Guest, M.D. fits within the Hospice and Palliative Medicine (Internal Medicine) Physician landscape nationally.

1,541
Hospice and Palliative Medicine (Internal Medicine) Physician Providers in US
51
States with Hospice and Palliative Medicine (Internal Medicine) Physician
1,275
Avg Claims per Provider

Keith Guest, M.D.'s 10,292 claims are above the specialty average of 1,275.

Nationwide Hospice and Palliative Medicine (Internal Medicine) Physician peers with similar MIPS or enrollment year

Two federal-record peer sets for Guest, both outside South Carolina so the neighborhoods are not geographic containment.

Similar MIPS final score

Nearest same-specialty clinicians by CMS MIPS final score (64.7 here).

Christopher Black 64.7 MO Michelle Issac 64.8 FL Ayesha Sooriabalan 65.4 NY Christopher Ahern 69.4 NH

Same NPPES enumeration year (2005)

Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.

Bradley Goad Roanoke, VA Juan Escobales St Petersburg, FL Eduard Porosnicu Brooklyn, NY William Miller Nevada City, CA

Nearby Hospice and Palliative Medicine (Internal Medicine) Physician Providers in South Carolina

Other clinicians with the same primary specialty enrolled in South Carolina, drawn from the same CMS NPPES roster as Guest.

One of 23 Hospice and Palliative Medicine (Internal Medicine) Physician providers enrolled in South Carolina, 5 are shown here.

Dr. Tonya Alexander
FNP-BC
Florence, SC
Dr. Joshua Arenth
MD
Charleston, SC
Dr. Aye Aung
M.D.,
Columbia, SC
Dr. Elizabeth Burpee
MD
Seneca, SC
Dr. Christopher Cauto
M.D.
Charleston, SC

Compare Hospice and Palliative Medicine (Internal Medicine) Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is Keith Guest, M.D.'s specialty? ▼
Keith Guest, M.D. specializes in Hospice and Palliative Medicine (Internal Medicine) Physician and practices in Lexington, South Carolina. Credentials: M.D..
How much does Keith Guest, M.D. prescribe under Medicare Part D? ▼
In 2023, Keith Guest, M.D. wrote 10,292 Medicare Part D claims totaling $422K in drug costs for 336 beneficiaries.
What is Keith Guest, M.D.'s Medicare quality score? ▼
Keith Guest, M.D. has a CMS MIPS Final Score of 64.7/100 (Quality: 61.3, Cost: 19.1). The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Keith Guest, M.D. located? ▼
Keith Guest, M.D. is located at PO BOX 487, Lexington, SC, 29071. Phone: (803) 699-9073.
What is Keith Guest, M.D.'s NPI number? ▼
Keith Guest, M.D.'s National Provider Identifier (NPI) is 1285630020, issued on 06/27/2005.
Does Keith Guest, M.D. prescribe more brand-name or generic drugs? ▼
Keith Guest, M.D.'s prescribing is 9% brand-name and 90% generic drugs by claim count, with $238K in brand drug costs.
Does Keith Guest, M.D. prescribe opioids? ▼
Yes, Keith Guest, M.D. had 70 opioid claims in 2023 with an opioid prescribing rate of 0.7%.
How many Hospice and Palliative Medicine (Internal Medicine) Physician providers are there in the US? ▼
There are 1,541 Hospice and Palliative Medicine (Internal Medicine) Physician providers across 51 states in the US. The average Hospice and Palliative Medicine (Internal Medicine) Physician provider writes 1,275 Medicare Part D claims per year.
What drugs does Keith Guest, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Keith Guest, M.D.'s most frequently prescribed drugs include Amlodipine Besylate, Atorvastatin Calcium, Furosemide. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Keith Guest, M.D. accept Medicare? ▼
Keith Guest, M.D. appears in CMS Medicare data with 10,292 Part D claims and 336 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Keith Guest, M.D.'s credentials? ▼
Keith Guest, M.D.'s NPI is 1285630020 with credentials M.D.. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.

Data Sources

View source datasets and methodology notes
Provider Directory
CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
Specialty Classification
NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
Prescribing Data
CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
Quality Performance
CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
Limitations
Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.

See our complete data methodology for details on how we collect and process government data.

Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).

Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology

Compiled from official public sources by the editorial process.

Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.