NPI registry status
Active
2026 NPPES data Pediatric Endocrinology Physician NPI 1396760450 MD
Verify on CMS → Ian Marshall, MD
Pediatric Endocrinology Physician in New Brunswick, New Jersey.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 1,498 in Pediatric Endocrinology 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
12
Medicare Part D claims · Pediatric Endocrinology Physician avg: 137
Industry payments
$12.2K
19 payments · CMS Open Payments (Sunshine Act)
What the federal data shows
Ian Marshall, MD filed 12 Medicare Part D claims in 2024 as a Pediatric Endocrinology Physician in New Brunswick, New Jersey.
- 12
- Part D claims, 2024
- Likely
- board-certified (heuristic)
- ≥0th
- 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 Ian Marshall, 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 1396760450), first enumerated 07/12/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 12 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
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- Reported
Industry payment transparency
$12.2K in reported industry payments (19 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- 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 1396760450 · Pediatric Endocrinology Physician
NPI-10 · ENUM-LEGACY · TAX-NARROW · RX-TRACE · BOOK-THIN · PHOTO-ENUM
- NPI-10 1396760450
- ENUM-LEGACY 2006
- TAX-NARROW 1,498
- RX-TRACE 12
- BOOK-THIN 49 in New Jersey
- PHOTO-ENUM Rose Gubitosi-Klug, MD · 2006
Ian Marshall, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
12 ≥ 0th percentile 0% 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 certification likely (heuristic, not verified)
Ian Marshall, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 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 Ian Marshall, MD?
Quality data not reportedPrimary specialty
Pediatric Endocrinology Physician
Medicare Part D claims
12 91% vs specialty avg
Specialty distribution in New Jersey
How Pediatric Endocrinology Physician compares to other specialties among New Jersey 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 Pediatric Endocrinology 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 | 1396760450 |
|---|---|
| Specialty | Pediatric Endocrinology Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 07/12/2006 |
Hospital and facility affiliations
Facilities where Ian Marshall, 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.
Rutgers Health-Rwj Scleroderma Program
New Brunswick, NJ
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Ian Marshall, MD. Source: openpaymentsdata.cms.gov.
Total received
$12.2K
Largest payer
Neurocrine Biosciences, Inc.
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2024.
12
Total Claims
$23K
Total Drug Cost
N/A
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 18
- Total Day Supply
- 540
Patient Demographics
- Average Patient Age
- 42.7 years
- Avg HCC Risk Score
- 1.10
Pediatric Endocrinology Physician Overview
How Ian Marshall, MD fits within the Pediatric Endocrinology Physician landscape nationally.
1,498
Pediatric Endocrinology Physician Providers in US
51
States with Pediatric Endocrinology Physician
137
Avg Claims per Provider
Ian Marshall, MD's 12 claims are below the specialty average of 137.
Nationwide Pediatric Endocrinology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Marshall, both outside New Jersey so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Pediatric Endocrinology Physician Providers in New Jersey
Other clinicians with the same primary specialty enrolled in New Jersey, drawn from the same CMS NPPES roster as Marshall.
One of 49 Pediatric Endocrinology Physician providers enrolled in New Jersey, 5 are shown here.
Dr. Javier Aisenberg
M.D
Hackensack, NJ
Dr. Henry Anhalt
D.O.
Hackensack, NJ
Dr. Valerie Auyeung
MD
Hackensack, NJ
Dr. Mark Bach
M.D., PH.D.
Scotch Plains, NJ
Dr. Frank Barrows
D.O.
Shrewsbury, NJ
Compare Pediatric Endocrinology Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Ian Marshall, MD's specialty? ▼
Ian Marshall, MD specializes in Pediatric Endocrinology Physician and practices in New Brunswick, New Jersey. Credentials: MD.
How much does Ian Marshall, MD prescribe under Medicare Part D? ▼
In 2024, Ian Marshall, MD wrote 12 Medicare Part D claims totaling $23K in drug costs for N/A beneficiaries.
Where is Ian Marshall, MD located? ▼
Ian Marshall, MD is located at 89 FRENCH STREET, New Brunswick, NJ, 08901. Phone: (732) 235-6230.
What is Ian Marshall, MD's NPI number? ▼
Ian Marshall, MD's National Provider Identifier (NPI) is 1396760450, issued on 07/12/2006.
How many Pediatric Endocrinology Physician providers are there in the US? ▼
There are 1,498 Pediatric Endocrinology Physician providers across 51 states in the US. The average Pediatric Endocrinology Physician provider writes 137 Medicare Part D claims per year.
Does Ian Marshall, MD accept Medicare? ▼
Ian Marshall, MD appears in CMS Medicare data with 12 Part D claims and N/A Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Ian Marshall, MD's credentials? ▼
Ian Marshall, MD's NPI is 1396760450 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.