Amber Caswell, MD
Family Medicine Physician in Hilton Head Island, 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 147,640 in Family 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.
What the federal data shows
Amber Caswell, MD reported a CMS MIPS final score of 70.1/100 - below the 83.1 national average - and filed 200 Medicare Part D claims in 2023.
- 70.1/100
- MIPS score · -13 vs avg
- 200
- Part D claims, 2023
- 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.
Amber Caswell, MD's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
70 8th percentile higher than 8% of 477,587 scored providers
Each bar is a band; taller bars hold more scored 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.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where Amber Caswell, MD sits
This provider among family medicine physician peers
Across the 22,040 family medicine physician providers who report both Medicare Part D prescribing and a MIPS quality score, Amber Caswell, MD writes more Part D claims than 12% of them and scores higher on MIPS quality than 11% - placing this provider in the lower-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Part D claim volume vs MIPS quality, by specialty percentile
Each dot is one family medicine physician peer from a representative sample of 60; the gold marker is Amber Caswell, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
Amber Caswell, MD 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 Amber Caswell, MD?
Below national averagePrimary specialty
Medicare Part D claims
MIPS final score
Specialty distribution in South Carolina
How Family Medicine Physician compares to other specialties among South Carolina providers
Largest specialties in South Carolina (% of in-state providers)
Family Medicine Physician ranks #7 among South Carolina's specialties (3.1% of in-state providers)
Each bar is a specialty's share of the South Carolina provider total, by primary NUCC taxonomy. The highlighted bar is Family Medicine Physician; the long tail of smaller specialties is omitted for legibility.
Medicare quality performance, MIPS
Amber Caswell, MD's 2023 MIPS final score plotted against the Family Medicine Physician national average
- MIPS Final Score
- 70.1/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Family Medicine Physician) - 70.1/100 vs national avg 83.1
Quality benchmarks
- National MIPS avg 2023 reporting year
- Quality dim CMS Quality category
- Cost dim CMS Cost category
- Specialty volume Family Medicine Physician US NPIs
70.1/100 MIPS final score - 13.0 pts below the 83.1 national average
Quality, Cost, Promoting Interoperability, and Improvement Activities composite score for the 2023 performance year. Specialty: Family Medicine Physician. Quality dim: 48.2. Cost dim: 53.6.
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).
Amber Caswell, MD appears in the CMS NPPES registry as a Family Medicine Physician provider holding MD credentials at 845 WILLIAM HILTON PKWY, Hilton Head Island, SC, 29928, with a listed phone of (843) 341-2416. NPI 1437303476 was issued on 11/04/2008. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what Caswell most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.
Medicare Part D records for calendar year 2023 show 200 prescription claims written by this provider, covering 130 Medicare beneficiaries and totaling roughly $4K in drug spend. These figures capture only Medicare Part D, commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 70.1/100 for the 2023 performance year (Quality 48.2, Cost 53.6), compared with the national average of 83.1.
Family Medicine Physician is a high-volume specialty nationwide, with 147,640 enrolled providers across 56 states and an average of 3,418 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline. Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist, always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.
Practice Address
Provider Details
| NPI | 1437303476 |
|---|---|
| Specialty | Family Medicine Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 11/04/2008 |
Verify this provider's license
PlainDoctor pulls this profile from the CMS NPPES public registry. Confirm Amber Caswell, MD's current license status, disciplinary history, and board certifications with the South Carolina Board of Medical Examiners in South Carolina before relying on this page for a clinical or care decision.
How we sourced this profile
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
Reporting: Group practice
Hospital and facility affiliations
Facilities where Amber Caswell, MD 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.
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
Prescribing Breakdown
- 30-Day Fills
- 246
- Total Day Supply
- 3,869
- Generic Drug Cost
- $2K
- Antibiotic Claims
- 59
Patient Demographics
- Average Patient Age
- 71.3 years
- Avg HCC Risk Score
- 0.98
- Gender Split
- 57% female / 43% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Amber Caswell, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Methylprednisolone
Methylprednisolone
46 claims
- Nitrofurantoin Mon… 13
Nitrofurantoin Mono-Macro
13 claims
- Doxycycline Hyclate 11
Doxycycline Hyclate
11 claims
| Drug | Claims |
|---|---|
| Methylprednisolone | 46 |
| Nitrofurantoin Mono-Macro Nitrofurantoin Monohyd/M-Cryst | 13 |
| Doxycycline Hyclate | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Family Medicine Physician Overview
How Amber Caswell, MD fits within the Family Medicine Physician landscape nationally.
Amber Caswell, MD's 200 claims are below the specialty average of 3,418.
Nearby Family 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 Caswell.
Compare Family Medicine Physician nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the South Carolina medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Family Medicine Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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Frequently Asked Questions
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Data Sources
- 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