NPI registry status
Active
2026 NPPES data Hematology & Oncology Physician NPI 1619409257 M.D.
Verify on CMS → Jonathan Alexander, M.D.
Hematology & Oncology Physician in Charleston, 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 11,232 in Hematology & Oncology 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
19
Medicare Part D claims · 11 beneficiaries · Hematology & Oncology Physician avg: 847
MIPS score
73.2/100
▼ 10 pts below national avg 83.1 · Mid-tier
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Jonathan Alexander, M.D. reported a CMS MIPS final score of 73.2/100 - below the 83.1 national average - and filed 19 Medicare Part D claims in 2023.
- 73.2/100
- MIPS score · -10 vs avg
- 19
- 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.
Jonathan Alexander, M.D.'s MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
73 11th percentile higher than 11% 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 Jonathan Alexander, M.D. sits
This provider among hematology & oncology physician peers
Across the 4,233 hematology & oncology physician providers who report both Medicare Part D prescribing and a MIPS quality score, Jonathan Alexander, M.D. writes more Part D claims than 1% of them and scores higher on MIPS quality than 9% - 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 hematology & oncology physician peer from a representative sample of 60; the gold marker is Jonathan Alexander, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Jonathan Alexander, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 3 hospital affiliations - 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 Jonathan Alexander, M.D.?
Below national averagePrimary specialty
Hematology & Oncology Physician
Medicare Part D claims
19 98% vs specialty avg
MIPS final score
73.2/100 9.9 pts vs avg
Specialty distribution in South Carolina
How Hematology & Oncology Physician compares to other specialties among South Carolina providers
Medicare quality performance, MIPS
Jonathan Alexander, M.D.'s 2023 MIPS final score plotted against the Hematology & Oncology Physician national average
- MIPS Final Score
- 73.2/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Hematology & Oncology Physician) - 73.2/100 vs national avg 83.1
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).
Jonathan Alexander, M.D. appears in the CMS NPPES registry as a Hematology & Oncology Physician provider holding M.D. credentials at 39 SABIN ST MSC 635, Charleston, SC, 29425, with a listed phone of (843) 792-4271. NPI 1619409257 was issued on 04/02/2017.
Medicare Part D records for calendar year 2023 show 19 prescription claims written by this provider, covering 11 Medicare beneficiaries and totaling roughly $2K in drug spend. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 73.2/100 for the 2023 performance year (Quality 73, Cost 59.5), compared with the national average of 83.1.
Hematology & Oncology Physician is a mid-sized specialty nationwide, with 11,232 enrolled providers across 54 states and an average of 847 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 | 1619409257 |
|---|---|
| Specialty | Hematology & Oncology Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 04/02/2017 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
73.2438
Final Score
Avg: 83.1
73.0442
Quality
59.5152
Cost
Reporting: Group practice
Hospital and facility affiliations
Facilities where Jonathan Alexander, 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.
According to CMS billing records, Jonathan Alexander, M.D. is affiliated with 3 Medicare-billing facilities across 2 states.
24 ON Physicians OF SC LLC
Charleston, SC
University Health System, Inc.
Knoxville, TN
University Medical Associates OF The Medical University OF South Carol
Charleston, 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).
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
19
Total Claims
$2K
Total Drug Cost
11
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 24
- Total Day Supply
- 572
- Generic Drug Cost
- $231
Patient Demographics
- Average Patient Age
- 66.7 years
- Avg HCC Risk Score
- 2.83
More Hematology & Oncology Physician in SC →
All providers in South Carolina →
Compare specialties →
Hematology & Oncology Physician Overview
How Jonathan Alexander, M.D. fits within the Hematology & Oncology Physician landscape nationally.
11,232
Hematology & Oncology Physician Providers in US
54
States with Hematology & Oncology Physician
847
Avg Claims per Provider
Jonathan Alexander, M.D.'s 19 claims are below the specialty average of 847.
Nearby Hematology & Oncology Physician Providers in South Carolina
Other clinicians with the same primary specialty enrolled in South Carolina, drawn from the same CMS NPPES roster as Alexander.
Dr. Mary Ackerman
MD
Columbia, SC
Dr. Samuel Adediran
M.D.,
Spartanburg, SC
Dr. Priyal Agarwal
MD
Charleston, SC
Dr. Steven Akman
MD
Charleston, SC
Dr. Faria Ali
MD
Myrtle Beach, SC
Compare Hematology & Oncology 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 Hematology & Oncology 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.
Healthcare Guides
Learn more about finding, verifying, and understanding healthcare providers.
How to Find a Doctor
Step-by-step guide to choosing a provider
Verify Credentials
Check NPI, board certification & license status
Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore South Carolina
Frequently Asked Questions
What is Jonathan Alexander, M.D.'s specialty? ▼
Jonathan Alexander, M.D. specializes in Hematology & Oncology Physician and practices in Charleston, South Carolina. Credentials: M.D..
How much does Jonathan Alexander, M.D. prescribe under Medicare Part D? ▼
In 2023, Jonathan Alexander, M.D. wrote 19 Medicare Part D claims totaling $2K in drug costs for 11 beneficiaries.
What is Jonathan Alexander, M.D.'s Medicare quality score? ▼
Jonathan Alexander, M.D. has a CMS MIPS Final Score of 73.2/100 (Quality: 73, Cost: 59.5). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Jonathan Alexander, M.D. located? ▼
Jonathan Alexander, M.D. is located at 39 SABIN ST MSC 635, Charleston, SC, 29425. Phone: (843) 792-4271.
What is Jonathan Alexander, M.D.'s NPI number? ▼
Jonathan Alexander, M.D.'s National Provider Identifier (NPI) is 1619409257, issued on 04/02/2017.
How many Hematology & Oncology Physician providers are there in the US? ▼
There are 11,232 Hematology & Oncology Physician providers across 54 states in the US. The average Hematology & Oncology Physician provider writes 847 Medicare Part D claims per year.
Does Jonathan Alexander, M.D. accept Medicare? ▼
Jonathan Alexander, M.D. appears in CMS Medicare data with 19 Part D claims and 11 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Jonathan Alexander, M.D.'s credentials? ▼
Jonathan Alexander, M.D.'s NPI is 1619409257 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 PlainDoctor editorial team.
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.