NPI registry status
Active
2026 NPPES data Internal Medicine Physician NPI 1649807462 MD
Verify on CMS → Esther Saul, MD
Internal Medicine Physician in Boston, Massachusetts.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 174,792 in 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
131
Medicare Part D claims · 29 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
43%
generic claims · 57% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Esther Saul, MD filed 131 Medicare Part D claims in 2024 as an Internal Medicine Physician in Boston, Massachusetts, prescribing 43% generic.
- 131
- Part D claims, 2024
- 43%
- generic prescribing
- ≥34th
- pct by Part D claim volume (lower-bound band)
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.
Federal trust snapshot
What official records show about Esther Saul, MD
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1649807462), first enumerated 03/23/2020.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 131 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Practices in an ABMS-board-eligible specialty; board certification not confirmed in federal records.
- State context
State board disciplinary context
Massachusetts statewide board action statistics are published annually — these figures describe aggregate state activity, not Esther Saul, MD's individual license status. Verify directly with the state medical board.
Source: BORIM annual report 2023
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1649807462 · Internal Medicine Physician
NPI-10 · ENUM-RECENT · TAX-MEGA · RX-LIGHT · BOOK-MID · PHOTO-ENUM
- NPI-10 1649807462
- ENUM-RECENT 2020
- TAX-MEGA 175K Internal Medicine
- RX-LIGHT 131
- BOOK-MID 7,865 in Massachusetts
- PHOTO-ENUM Cesar Sanchez · 2020
Esther Saul, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
131 ≥ 34th percentile 34% of 1,416,883 prescribers are in lower value bands
Each bar is a band; taller bars hold more prescribers. 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 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2024
◑
Board-eligible specialty (heuristic, not verified)
Esther Saul, MD practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Esther Saul, MD?
Quality data not reportedPrimary specialty
Internal Medicine Physician
Medicare Part D claims
131 95% vs specialty avg
Specialty distribution in Massachusetts
How Internal Medicine Physician compares to other specialties among Massachusetts providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Internal Medicine Physician. Verify directly:
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
Provider Details
| NPI | 1649807462 |
|---|---|
| Specialty | Internal Medicine Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 03/23/2020 |
License & disciplinary context - Massachusetts BORIM 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~38K Massachusetts medical licensees in 2023 - they are NOT specific to Esther Saul, MD. To verify Esther Saul, MD's current license status, search the BORIM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
80
Total board actions, Massachusetts 2023
Across 78 cases
2.11
Actions per 1,000 licensees
Massachusetts statewide rate
probation
Most common action type
29 cases
BORIM publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Massachusetts disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Brand-heavy
Esther Saul, MD - brand share 57.0%
Internal Medicine Physician average
57% brand-name claims vs 43% generic, on 131 2024 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 2024.
131
Total Claims
$104K
Total Drug Cost
29
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 216.133
- Total Day Supply
- 5,971
- Brand vs Generic
- 57% brand / 43% generic
- Brand Drug Cost
- $102K
- Generic Drug Cost
- $2K
- Antibiotic Claims
- 13
Patient Demographics
- Average Patient Age
- 70.7 years
- Avg HCC Risk Score
- 2.18
- Gender Split
- 52% female / 48% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Esther Saul, MD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Albuterol Sulfate …
Albuterol Sulfate Hfa
22 claims
- Trelegy Ellipta
Trelegy Ellipta
16 claims
- Montelukast Sodium
Montelukast Sodium
11 claims
| Drug | Claims |
|---|---|
| Albuterol Sulfate Hfa Albuterol Sulfate | 22 |
| Trelegy Ellipta Fluticasone/Umeclidin/Vilanter | 16 |
| Montelukast Sodium | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Internal Medicine Physician Overview
How Esther Saul, MD fits within the Internal Medicine Physician landscape nationally.
174,792
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,785
Avg Claims per Provider
Esther Saul, MD's 131 claims are below the specialty average of 2,785.
Nationwide Internal Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Saul, both outside Massachusetts so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2020)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Internal Medicine Physician Providers in Massachusetts
Other clinicians with the same primary specialty enrolled in Massachusetts, drawn from the same CMS NPPES roster as Saul.
One of 7,865 Internal Medicine Physician providers enrolled in Massachusetts, 5 are shown here.
Dr. Nawal Aamir
MD
Worcester, MA
Zainab Abbas
Worcester, MA
Nooshin Abbasi
MD MPH
Newton, MA
Dr. Lauren Abbate
MD
Boston, MA
Dr. Bassima Abdallah
MD
Boston, MA
Compare Internal Medicine Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Esther Saul, MD's specialty? ▼
Esther Saul, MD specializes in Internal Medicine Physician and practices in Boston, Massachusetts. Credentials: MD.
How much does Esther Saul, MD prescribe under Medicare Part D? ▼
In 2024, Esther Saul, MD wrote 131 Medicare Part D claims totaling $104K in drug costs for 29 beneficiaries.
Where is Esther Saul, MD located? ▼
Esther Saul, MD is located at 801 MASSACHUSETTS AVE, SUITE 6B, Boston, MA, 02118. Phone: (617) 414-5951.
What is Esther Saul, MD's NPI number? ▼
Esther Saul, MD's National Provider Identifier (NPI) is 1649807462, issued on 03/23/2020.
Does Esther Saul, MD prescribe more brand-name or generic drugs? ▼
Esther Saul, MD's prescribing is 57% brand-name and 43% generic drugs by claim count, with $102K in brand drug costs.
How many Internal Medicine Physician providers are there in the US? ▼
There are 174,792 Internal Medicine Physician providers across 56 states in the US. The average Internal Medicine Physician provider writes 2,785 Medicare Part D claims per year.
What drugs does Esther Saul, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, Esther Saul, MD's most frequently prescribed drugs include Albuterol Sulfate Hfa, Trelegy Ellipta, Montelukast Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Esther Saul, MD accept Medicare? ▼
Esther Saul, MD appears in CMS Medicare data with 131 Part D claims and 29 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Esther Saul, MD's credentials? ▼
Esther Saul, MD's NPI is 1649807462 with credentials MD. 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 (2024). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- 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 August 2026 (NPPES) / 2024 (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
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 August 2026.