2026 NPPES data Neonatal-Perinatal Medicine Physician NPI 1467435685 MD
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Ian Gross, MD

Neonatal-Perinatal Medicine Physician in New Haven, Connecticut. This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 5,589 in Neonatal-Perinatal 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
25
Medicare Part D claims · Neonatal-Perinatal Medicine Physician avg: 56
Compiled from official public sources by the PlainDoctor editorial team.

What the federal data shows

Ian Gross, MD filed 25 Medicare Part D claims in 2023 as a Neonatal-Perinatal Medicine Physician in New Haven, Connecticut.

25
Part D claims, 2023

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.

Ian Gross, MD's Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023, across all CMS prescribers nationally

25 0th percentile higher than 0% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). This entry sits in this band. 200–400: 182,923 prescribers (13%). Above this entry. 400–600: 90,619 prescribers (7%). Above this entry. 600–800: 56,224 prescribers (4%). Above this entry. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2K+: 213,991 prescribers (16%). Above this entry. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

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.

Source CMS Medicare Part D Prescriber Public Use File · 2023

Board-eligible specialty (heuristic, not verified)

Ian Gross, 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 Ian Gross, MD?

Quality data not reported

NPI registry status

Active

Issued 11/22/2005

NPI 1467435685

Primary specialty

Neonatal-Perinatal Medicine Physician

Mid-sized

5,589 US NPIs in this specialty

Medicare Part D claims

25 55% vs specialty avg

2023 prescription claims

Specialty avg: 56

Specialty distribution in Connecticut

How Neonatal-Perinatal Medicine Physician compares to other specialties among Connecticut providers

Connecticut providers
Clinical Social Worker - 8.4%Clinical Social Worker8.4%Student in an Organized Health Care Education/Training Program - 7.7%Student in an Organized Health Care Education/Training Program7.7%Physical Therapist - 4.2%Physical Therapist4.2%Pharmacist - 3.9%Pharmacist3.9%Internal Medicine Physician - 3.4%Internal Medicine Physician3.4%Mental Health Counselor - 3.2%Mental Health Counselor3.2%Neonatal-Perinatal Medicine Physician - 0.1%Neonatal-Perinatal Medicine Physician0.1%
Largest specialties in Connecticut (% of in-state 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 Neonatal-Perinatal Medicine Physician. Verify directly:

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).

Ian Gross, MD appears in the CMS NPPES registry as a Neonatal-Perinatal Medicine Physician provider holding MD credentials at 20 YORK ST, New Haven, CT, 06504, with a listed phone of (203) 688-2320. NPI 1467435685 was issued on 11/22/2005. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what Gross 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 25 prescription claims written by this provider, covering N/A Medicare beneficiaries and totaling roughly $786 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.

Neonatal-Perinatal Medicine Physician is a mid-sized specialty nationwide, with 5,589 enrolled providers across 52 states and an average of 56 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

20 YORK ST
New Haven, CT 06504

Provider Details

NPI 1467435685
Specialty Neonatal-Perinatal Medicine Physician
Credentials MD
Gender Male
NPI Issued 11/22/2005

Medicare Part D Prescribing Data

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

25
Total Claims
$786
Total Drug Cost
N/A
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
75
Total Day Supply
2,250
Brand Drug Cost
$0
Generic Drug Cost
$786

Patient Demographics

Average Patient Age
78.5 years
Avg HCC Risk Score
0.96

Neonatal-Perinatal Medicine Physician Overview

How Ian Gross, MD fits within the Neonatal-Perinatal Medicine Physician landscape nationally.

5,589
Neonatal-Perinatal Medicine Physician Providers in US
52
States with Neonatal-Perinatal Medicine Physician
56
Avg Claims per Provider

Ian Gross, MD's 25 claims are below the specialty average of 56.

Nearby Neonatal-Perinatal Medicine Physician Providers in Connecticut

Other clinicians with the same primary specialty enrolled in Connecticut, drawn from the same CMS NPPES roster as Gross.

Compare Neonatal-Perinatal 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 Connecticut medical board, federal registration is not a license check. Credential verification guide
  • Weigh a second option: compare this provider with a nearby Neonatal-Perinatal 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.

Frequently Asked Questions

What is Ian Gross, MD's specialty?
Ian Gross, MD specializes in Neonatal-Perinatal Medicine Physician and practices in New Haven, Connecticut. Credentials: MD.
How much does Ian Gross, MD prescribe under Medicare Part D?
In 2023, Ian Gross, MD wrote 25 Medicare Part D claims totaling $786 in drug costs for N/A beneficiaries.
Where is Ian Gross, MD located?
Ian Gross, MD is located at 20 YORK ST, New Haven, CT, 06504. Phone: (203) 688-2320.
What is Ian Gross, MD's NPI number?
Ian Gross, MD's National Provider Identifier (NPI) is 1467435685, issued on 11/22/2005.
How many Neonatal-Perinatal Medicine Physician providers are there in the US?
There are 5,589 Neonatal-Perinatal Medicine Physician providers across 52 states in the US. The average Neonatal-Perinatal Medicine Physician provider writes 56 Medicare Part D claims per year.
Does Ian Gross, MD accept Medicare?
Ian Gross, MD appears in CMS Medicare data with 25 Part D claims and N/A Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Ian Gross, MD's credentials?
Ian Gross, MD's NPI is 1467435685 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

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.
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.