2026 NPPES data Internal Medicine Physician NPI 1700102159 M.D.
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NAYAN ARORA, M.D.

Internal Medicine Physician in PORTLAND, Oregon. 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
467
Medicare Part D claims · 80 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
74%
generic claims · 26% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$7.3K
10 payments · CMS Open Payments (Sunshine Act)
What the federal data reveals: NAYAN ARORA, M.D. is a Internal Medicine Physician ([object Object]) practicing in PORTLAND, Oregon with a Medicare Part D prescribing footprint of 467 claims across 80 beneficiaries — 26% brand-name prescribing . Industry payments of $7.3K across 10 transactions are disclosed under CMS Open Payments (Sunshine Act).

What stands out: NAYAN ARORA, M.D. filed 467 Medicare Part D claims in 2023 across PORTLAND, Oregon. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

NAYAN ARORA, M.D. 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).

NAYAN ARORA, M.D. at a glance

Quality data not reported

NPI registry status

Active

Issued 04/09/2010

NPI 1700102159

Primary specialty

Internal Medicine Physician

High-volume

172,858 US NPIs in this specialty

Medicare Part D claims

467 83% vs specialty avg

2023 prescription claims

Specialty avg: 2,716

Specialty distribution in Oregon

How Internal Medicine Physician compares to other specialties among Oregon providers

Oregon providers

Internal Medicine Physician share within Oregon

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

Specialty board-certification context

Estimated specialty board-certified rate — Internal Medicine Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Internal Medicine Physician ABMS/AOA estimate

Est. board-certified rate (Internal Medicine Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Internal Medicine Physician) — ABMS / AOA estimate

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).

NAYAN ARORA, M.D. is a Internal Medicine Physician provider practicing in PORTLAND, Oregon, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: M.D.. NPI: 1700102159. 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.

NAYAN ARORA, M.D. appears in the CMS NPPES registry as a Internal Medicine Physician provider holding M.D. credentials at 3181 SW SAM JACKSON PARK RD, PORTLAND, OR, 97239, with a listed phone of (503) 494-3442. NPI 1700102159 was issued on 04/09/2010. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what ARORA 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 467 prescription claims written by this provider, covering 80 Medicare beneficiaries and totaling roughly $155K in drug spend, split 26% brand-name and 74% generic by claim count. 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.

Internal Medicine Physician is a high-volume specialty nationwide, with 172,858 enrolled providers across 56 states and an average of 2,716 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

3181 SW SAM JACKSON PARK RD
PORTLAND, OR 97239

Provider Details

NPI 1700102159
Specialty Internal Medicine Physician
Credentials M.D.
Gender Male
NPI Issued 04/09/2010

Hospital and facility affiliations

Facilities where NAYAN ARORA, 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.

UNIVERSITY PROFESSIONAL SERVICES
PORTLAND, OR

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 NAYAN ARORA, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$7.3K

Largest payer

Bayer Healthcare Pharmaceuticals Inc.

Most common payment type

Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program

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.

Brand vs generic prescribing mix · Above average

NAYAN ARORA, M.D. — brand share 26.0%
Specialty average (est.)

26% brand-name claims vs 74% generic, on 467 2023 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 2023.

467
Total Claims
$155K
Total Drug Cost
80
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
1,088
Total Day Supply
32,185
Brand vs Generic
26% brand / 74% generic
Brand Drug Cost
$146K
Generic Drug Cost
$10K

Patient Demographics

Average Patient Age
67.5 years
Avg HCC Risk Score
3.18
Gender Split
49% female / 51% male

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Lisinopril
44
Jardiance
Empagliflozin
42
Amlodipine Besylate
38
Chlorthalidone
30
Losartan Potassium
30
Farxiga
Dapagliflozin Propanediol
26
Carvedilol
20
Allopurinol
17
Tamsulosin Hcl
17
Kerendia
Finerenone
15

* 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 NAYAN ARORA, M.D. fits within the Internal Medicine Physician landscape nationally.

172,858
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider

NAYAN ARORA, M.D.'s 467 claims are below the specialty average of 2,716.

Nearby Internal Medicine Physician Providers in Oregon

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

Compare Internal Medicine Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is NAYAN ARORA, M.D.'s specialty?
NAYAN ARORA, M.D. specializes in Internal Medicine Physician and practices in PORTLAND, Oregon. Credentials: M.D..
How much does NAYAN ARORA, M.D. prescribe under Medicare Part D?
In 2023, NAYAN ARORA, M.D. wrote 467 Medicare Part D claims totaling $155K in drug costs for 80 beneficiaries.
Where is NAYAN ARORA, M.D. located?
NAYAN ARORA, M.D. is located at 3181 SW SAM JACKSON PARK RD, PORTLAND, OR, 97239. Phone: (503) 494-3442.
What is NAYAN ARORA, M.D.'s NPI number?
NAYAN ARORA, M.D.'s National Provider Identifier (NPI) is 1700102159, issued on 04/09/2010.
Does NAYAN ARORA, M.D. prescribe more brand-name or generic drugs?
NAYAN ARORA, M.D.'s prescribing is 26% brand-name and 74% generic drugs by claim count, with $146K in brand drug costs.
How many Internal Medicine Physician providers are there in the US?
There are 172,858 Internal Medicine Physician providers across 56 states in the US. The average Internal Medicine Physician provider writes 2,716 Medicare Part D claims per year.
What drugs does NAYAN ARORA, M.D. prescribe most often?
Based on 2023 Medicare Part D data, NAYAN ARORA, M.D.'s most frequently prescribed drugs include Lisinopril, Jardiance, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does NAYAN ARORA, M.D. accept Medicare?
NAYAN ARORA, M.D. appears in CMS Medicare data with 467 Part D claims and 80 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify NAYAN ARORA, M.D.'s credentials?
NAYAN ARORA, M.D.'s NPI is 1700102159 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

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