2026 NPPES data Hospitalist Physician NPI 1023512811 MD
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ARUN NACHIAPPAN, MD

Hospitalist Physician in BRIDGEPORT, Connecticut. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
544
Medicare Part D claims · 151 beneficiaries · Hospitalist Physician avg: 888
MIPS score
93.2757/100
▲ 10 pts above national avg 83.1 · [object Object]
What the federal data reveals: ARUN NACHIAPPAN, MD is a Hospitalist Physician ([object Object]) practicing in BRIDGEPORT, Connecticut with a Medicare Part D prescribing footprint of 544 claims across 151 beneficiaries . Their CMS MIPS Final Score of 93.2757/100 (national average: 83.1) reflects performance across Quality, Cost, Interoperability, and Improvement Activities .

What stands out: ARUN NACHIAPPAN, MD reported a CMS MIPS final score of 93.2757 out of 100, above the 83.1 national average, and filed 544 Medicare Part D claims in 2023. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

ARUN NACHIAPPAN, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 2 hospital affiliations — signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

ARUN NACHIAPPAN, MD at a glance

High performer (top quartile)

NPI registry status

Active

Issued 03/19/2018

NPI 1023512811

Primary specialty

Hospitalist Physician

Mid-sized

16,825 US NPIs in this specialty

Medicare Part D claims

544 39% vs specialty avg

2023 prescription claims

Specialty avg: 888

MIPS final score

93.2757/100 10.175700000000006% pts

Exceptional band

vs 83.1 national avg

Specialty distribution in Connecticut

How Hospitalist Physician compares to other specialties among Connecticut providers

Connecticut providers

Hospitalist Physician share within Connecticut

1. Hospitalist Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Hospitalist Physician share within Connecticut

Medicare quality performance — MIPS

ARUN NACHIAPPAN, MD's 2023 MIPS final score plotted against the Hospitalist Physician national average

High performer (top quartile)
MIPS Final Score
93.2757/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Hospitalist Physician) — 93.2757/100 vs national avg 83.1

0%100%National avg83%93.3%
MIPS final score (Hospitalist Physician) — 93.2757/100 vs national avg 83.1

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).

ARUN NACHIAPPAN, MD is a Hospitalist Physician provider practicing in BRIDGEPORT, Connecticut, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD. NPI: 1023512811. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

ARUN NACHIAPPAN, MD appears in the CMS NPPES registry as a Hospitalist Physician provider holding MD credentials at 267 GRANT ST, BRIDGEPORT, CT, 06610, with a listed phone of (281) 797-2850. NPI 1023512811 was issued on 03/19/2018. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what NACHIAPPAN 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 544 prescription claims written by this provider, covering 151 Medicare beneficiaries and totaling roughly $94K in drug spend, with an opioid prescribing rate of 2.8%. 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 93.2757/100 for the 2023 performance year (Quality 81.7219), compared with the national average of 83.1.

Hospitalist Physician is a mid-sized specialty nationwide, with 16,825 enrolled providers across 54 states and an average of 888 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

267 GRANT ST
BRIDGEPORT, CT 06610

Provider Details

NPI 1023512811
Specialty Hospitalist Physician
Credentials MD
Gender Male
NPI Issued 03/19/2018

CMS Quality Score (MIPS)

Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.

93.2757
Final Score
Avg: 83.1
81.7219
Quality
78.0315
Promoting Interoperability

Reporting: Alternative Payment Model

Hospital and facility affiliations

Facilities where ARUN NACHIAPPAN, 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.

ASSOCIATED PHYSICIANS OF HARVARD MEDICAL FACULTY PHYSICIANS AT BETH IS
NEW BEDFORD, MA
HARVARD MEDICAL FACULTY PHYS AT BETH ISRAEL DEACONESS MED CTR INC
BOSTON, MA

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.

544
Total Claims
$94K
Total Drug Cost
151
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
1,001
Total Day Supply
26,514
Generic Drug Cost
$8K
Opioid Claims
15 (2.8% rate)
Antibiotic Claims
65

Patient Demographics

Average Patient Age
76.2 years
Avg HCC Risk Score
3.14
Gender Split
54% female / 46% male
Age Distribution
<65: 13, 65-74: 45, 75-84: 57, 85+: 36

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

Drug Claims
Rosuvastatin Calcium
33
Eliquis
Apixaban
30
Furosemide
26
Prednisone
24
Carvedilol
20
Metoprolol Succinate
19
Spironolactone
16
Famotidine
14
Metoprolol Tartrate
14
Moxifloxacin Hcl
13

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Hospitalist Physician Overview

How ARUN NACHIAPPAN, MD fits within the Hospitalist Physician landscape nationally.

16,825
Hospitalist Physician Providers in US
54
States with Hospitalist Physician
888
Avg Claims per Provider

ARUN NACHIAPPAN, MD's 544 claims are below the specialty average of 888.

Nearby Hospitalist Physician Providers in Connecticut

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

Compare Hospitalist Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is ARUN NACHIAPPAN, MD's specialty?
ARUN NACHIAPPAN, MD specializes in Hospitalist Physician and practices in BRIDGEPORT, Connecticut. Credentials: MD.
How much does ARUN NACHIAPPAN, MD prescribe under Medicare Part D?
In 2023, ARUN NACHIAPPAN, MD wrote 544 Medicare Part D claims totaling $94K in drug costs for 151 beneficiaries.
What is ARUN NACHIAPPAN, MD's Medicare quality score?
ARUN NACHIAPPAN, MD has a CMS MIPS Final Score of 93.2757/100 (Quality: 81.7219). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is ARUN NACHIAPPAN, MD located?
ARUN NACHIAPPAN, MD is located at 267 GRANT ST, BRIDGEPORT, CT, 06610. Phone: (281) 797-2850.
What is ARUN NACHIAPPAN, MD's NPI number?
ARUN NACHIAPPAN, MD's National Provider Identifier (NPI) is 1023512811, issued on 03/19/2018.
Does ARUN NACHIAPPAN, MD prescribe opioids?
Yes, ARUN NACHIAPPAN, MD had 15 opioid claims in 2023 with an opioid prescribing rate of 2.8%.
How many Hospitalist Physician providers are there in the US?
There are 16,825 Hospitalist Physician providers across 54 states in the US. The average Hospitalist Physician provider writes 888 Medicare Part D claims per year.
What drugs does ARUN NACHIAPPAN, MD prescribe most often?
Based on 2023 Medicare Part D data, ARUN NACHIAPPAN, MD's most frequently prescribed drugs include Rosuvastatin Calcium, Eliquis, Furosemide. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does ARUN NACHIAPPAN, MD accept Medicare?
ARUN NACHIAPPAN, MD appears in CMS Medicare data with 544 Part D claims and 151 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify ARUN NACHIAPPAN, MD's credentials?
ARUN NACHIAPPAN, MD's NPI is 1023512811 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.
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