2026 NPPES data Radiation Oncology Physician NPI 1376954693 M.D.
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RAM NARAYAN, M.D.

Radiation Oncology Physician in MERRILLVILLE, Indiana. 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
36
Medicare Part D claims · 22 beneficiaries · Radiation Oncology Physician avg: 186
Generic prescribing
47%
generic claims · 53% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$1.1K
2 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

RAM NARAYAN, M.D. filed 36 Medicare Part D claims in 2023 as a Radiation Oncology Physician in MERRILLVILLE, Indiana, prescribing 47% generic.

36
Part D claims, 2023
47%
generic prescribing
Likely
board-certified (heuristic)

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.

RAM NARAYAN, M.D.'s Medicare Part D volume vs every U.S. prescriber

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

36 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. 2,000–2,200: 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 certification likely (heuristic — not verified)

RAM NARAYAN, 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).

What does the federal data show about RAM NARAYAN, M.D.?

Quality data not reported

NPI registry status

Active

Issued 05/09/2014

NPI 1376954693

Primary specialty

Radiation Oncology Physician

Mid-sized

6,018 US NPIs in this specialty

Medicare Part D claims

36 81% vs specialty avg

2023 prescription claims

Specialty avg: 186

Specialty distribution in Indiana

How Radiation Oncology Physician compares to other specialties among Indiana providers

Indiana providers

Radiation Oncology Physician share within Indiana

1. Radiation Oncology Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Radiation Oncology Physician share within Indiana

Specialty board-certification context

Estimated specialty board-certified rate — Radiation Oncology Physician (ABMS / AOA reference)

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

Est. board-certified rate (Radiation Oncology Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Radiation Oncology 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).

RAM NARAYAN, M.D. appears in the CMS NPPES registry as a Radiation Oncology Physician provider holding M.D. credentials at 200 E 89TH AVE, MERRILLVILLE, IN, 46410, with a listed phone of (219) 738-5598. NPI 1376954693 was issued on 05/09/2014. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what NARAYAN 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 36 prescription claims written by this provider, covering 22 Medicare beneficiaries and totaling roughly $463 in drug spend, split 53% brand-name and 47% 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.

Radiation Oncology Physician is a mid-sized specialty nationwide, with 6,018 enrolled providers across 52 states and an average of 186 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

200 E 89TH AVE
MERRILLVILLE, IN 46410

Provider Details

NPI 1376954693
Specialty Radiation Oncology Physician
Credentials M.D.
Gender Male
NPI Issued 05/09/2014

Hospital and facility affiliations

Facilities where RAM NARAYAN, 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.

PROMEDICA MULTI SPECIALTY PHYSICIANS
TOLEDO, OH

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 RAM NARAYAN, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$1.1K

Largest payer

AstraZeneca Pharmaceuticals LP

Most common payment type

Consulting Fee

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 · Brand-heavy

RAM NARAYAN, M.D. — brand share 53.0%
Specialty average (est.)

53% brand-name claims vs 47% generic, on 36 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.

36
Total Claims
$463
Total Drug Cost
22
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
38
Total Day Supply
757
Brand vs Generic
53% brand / 47% generic
Brand Drug Cost
$132
Generic Drug Cost
$331

Patient Demographics

Average Patient Age
71.5 years
Avg HCC Risk Score
2.09

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Silver Sulfadiazine
17

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

Radiation Oncology Physician Overview

How RAM NARAYAN, M.D. fits within the Radiation Oncology Physician landscape nationally.

6,018
Radiation Oncology Physician Providers in US
52
States with Radiation Oncology Physician
186
Avg Claims per Provider

RAM NARAYAN, M.D.'s 36 claims are below the specialty average of 186.

Nearby Radiation Oncology Physician Providers in Indiana

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

Compare Radiation Oncology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is RAM NARAYAN, M.D.'s specialty?
RAM NARAYAN, M.D. specializes in Radiation Oncology Physician and practices in MERRILLVILLE, Indiana. Credentials: M.D..
How much does RAM NARAYAN, M.D. prescribe under Medicare Part D?
In 2023, RAM NARAYAN, M.D. wrote 36 Medicare Part D claims totaling $463 in drug costs for 22 beneficiaries.
Where is RAM NARAYAN, M.D. located?
RAM NARAYAN, M.D. is located at 200 E 89TH AVE, MERRILLVILLE, IN, 46410. Phone: (219) 738-5598.
What is RAM NARAYAN, M.D.'s NPI number?
RAM NARAYAN, M.D.'s National Provider Identifier (NPI) is 1376954693, issued on 05/09/2014.
Does RAM NARAYAN, M.D. prescribe more brand-name or generic drugs?
RAM NARAYAN, M.D.'s prescribing is 53% brand-name and 47% generic drugs by claim count, with $132 in brand drug costs.
How many Radiation Oncology Physician providers are there in the US?
There are 6,018 Radiation Oncology Physician providers across 52 states in the US. The average Radiation Oncology Physician provider writes 186 Medicare Part D claims per year.
What drugs does RAM NARAYAN, M.D. prescribe most often?
Based on 2023 Medicare Part D data, RAM NARAYAN, M.D.'s most frequently prescribed drugs include Silver Sulfadiazine. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does RAM NARAYAN, M.D. accept Medicare?
RAM NARAYAN, M.D. appears in CMS Medicare data with 36 Part D claims and 22 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify RAM NARAYAN, M.D.'s credentials?
RAM NARAYAN, M.D.'s NPI is 1376954693 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