2026 NPPES data Addiction Medicine (Internal Medicine) Physician NPI 1124465745 M. D.
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AMUTHA RAJAGOPAL, M. D.

Addiction Medicine (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
4K
Medicare Part D claims · 157 beneficiaries · Addiction Medicine (Internal Medicine) Physician avg: 1K
Generic prescribing
65%
generic claims · 35% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

AMUTHA RAJAGOPAL, M. D. filed 4,099 Medicare Part D claims in 2023 as a Addiction Medicine (Internal Medicine) Physician in PORTLAND, Oregon, prescribing 65% generic.

4K
Part D claims, 2023
65%
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.

AMUTHA RAJAGOPAL, M. D.'s Medicare Part D volume vs every U.S. prescriber

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

4,099 Top 8% higher than 92% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). Below this entry. 600–800: 56,224 prescribers (4%). Below this entry. 800–1,000: 40,919 prescribers (3%). Below this entry. 1,000–1,200: 31,827 prescribers (2%). Below this entry. 1,200–1,400: 26,224 prescribers (2%). Below this entry. 1,400–1,600: 21,710 prescribers (2%). Below this entry. 1,600–1,800: 19,072 prescribers (1%). Below this entry. 1,800–2,000: 16,451 prescribers (1%). Below this entry. 2,000–2,200: 213,991 prescribers (16%). This entry sits in this band. 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)

AMUTHA RAJAGOPAL, M. D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 4 hospital affiliations — 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 AMUTHA RAJAGOPAL, M. D.?

Quality data not reported

NPI registry status

Active

Issued 05/23/2013

NPI 1124465745

Primary specialty

Addiction Medicine (Internal Medicine) Physician

Niche

553 US NPIs in this specialty

Medicare Part D claims

4,099 192% vs specialty avg

2023 prescription claims

Specialty avg: 1,403

Specialty distribution in Oregon

How Addiction Medicine (Internal Medicine) Physician compares to other specialties among Oregon providers

Oregon providers

Addiction Medicine (Internal Medicine) Physician share within Oregon

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

Specialty board-certification context

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

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

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

0%100%78%
Est. board-certified rate (Addiction Medicine (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).

AMUTHA RAJAGOPAL, M. D. appears in the CMS NPPES registry as a Addiction Medicine (Internal Medicine) Physician provider holding M. D. credentials at 3181 SW SAM JACKSON PARK RD, PORTLAND, OR, 97239, with a listed phone of (503) 494-5862. NPI 1124465745 was issued on 05/23/2013. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what RAJAGOPAL 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 4,099 prescription claims written by this provider, covering 157 Medicare beneficiaries and totaling roughly $3.4 million in drug spend, split 35% brand-name and 65% generic by claim count, with an opioid prescribing rate of 3.8%. 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.

Addiction Medicine (Internal Medicine) Physician is a narrow specialty nationwide, with 553 enrolled providers across 46 states and an average of 1,403 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 1124465745
Specialty Addiction Medicine (Internal Medicine) Physician
Credentials M. D.
Gender Female
NPI Issued 05/23/2013

Hospital and facility affiliations

Facilities where AMUTHA RAJAGOPAL, 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.

CITY AND COUNTY OF SAN FRANCISCO
SAN FRANCISCO, CA
PORTLAND ADVENTIST MEDICAL CENTER
PORTLAND, OR
UNIVERSITY OF CALIFORNIA SFGH MEDICAL GROUP
SAN FRANCISCO, CA
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).

Brand vs generic prescribing mix · Above average

AMUTHA RAJAGOPAL, M. D. — brand share 35.0%
Specialty average (est.)

35% brand-name claims vs 65% generic, on 4,099 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.

4,099
Total Claims
$3.4M
Total Drug Cost
157
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
5,091
Total Day Supply
144,175
Brand vs Generic
35% brand / 65% generic
Brand Drug Cost
$3.3M
Generic Drug Cost
$117K
Opioid Claims
157 (3.8% rate)
Antibiotic Claims
41

Patient Demographics

Average Patient Age
61.8 years
Avg HCC Risk Score
1.96
Gender Split
17% female / 83% male
Age Distribution
<65: 90, 65-74: 58, 75-84: N/A, 85+: N/A

Top Prescribed Drugs (Medicare Part D)

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

What AMUTHA RAJAGOPAL, M. D. prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Biktarvy
Bictegrav/Emtricit/Tenofov Ala
342
Atorvastatin Calcium
231
Pifeltro
Doravirine
102
Gabapentin
91
Tamsulosin Hcl
90
Vascepa
Icosapent Ethyl
85
Amlodipine Besylate-Benazepril
Amlodipine Besylate/Benazepril
81
Ozempic
Semaglutide
75
Hydrocodone-Acetaminophen
Hydrocodone/Acetaminophen
74
Pregabalin
72

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

Addiction Medicine (Internal Medicine) Physician Overview

How AMUTHA RAJAGOPAL, M. D. fits within the Addiction Medicine (Internal Medicine) Physician landscape nationally.

553
Addiction Medicine (Internal Medicine) Physician Providers in US
46
States with Addiction Medicine (Internal Medicine) Physician
1,403
Avg Claims per Provider

AMUTHA RAJAGOPAL, M. D.'s 4,099 claims are above the specialty average of 1,403.

Nearby Addiction Medicine (Internal Medicine) Physician Providers in Oregon

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

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

Frequently Asked Questions

What is AMUTHA RAJAGOPAL, M. D.'s specialty?
AMUTHA RAJAGOPAL, M. D. specializes in Addiction Medicine (Internal Medicine) Physician and practices in PORTLAND, Oregon. Credentials: M. D..
How much does AMUTHA RAJAGOPAL, M. D. prescribe under Medicare Part D?
In 2023, AMUTHA RAJAGOPAL, M. D. wrote 4,099 Medicare Part D claims totaling $3.4M in drug costs for 157 beneficiaries.
Where is AMUTHA RAJAGOPAL, M. D. located?
AMUTHA RAJAGOPAL, M. D. is located at 3181 SW SAM JACKSON PARK RD, PORTLAND, OR, 97239. Phone: (503) 494-5862.
What is AMUTHA RAJAGOPAL, M. D.'s NPI number?
AMUTHA RAJAGOPAL, M. D.'s National Provider Identifier (NPI) is 1124465745, issued on 05/23/2013.
Does AMUTHA RAJAGOPAL, M. D. prescribe more brand-name or generic drugs?
AMUTHA RAJAGOPAL, M. D.'s prescribing is 35% brand-name and 65% generic drugs by claim count, with $3.3M in brand drug costs.
Does AMUTHA RAJAGOPAL, M. D. prescribe opioids?
Yes, AMUTHA RAJAGOPAL, M. D. had 157 opioid claims in 2023 with an opioid prescribing rate of 3.8%.
How many Addiction Medicine (Internal Medicine) Physician providers are there in the US?
There are 553 Addiction Medicine (Internal Medicine) Physician providers across 46 states in the US. The average Addiction Medicine (Internal Medicine) Physician provider writes 1,403 Medicare Part D claims per year.
What drugs does AMUTHA RAJAGOPAL, M. D. prescribe most often?
Based on 2023 Medicare Part D data, AMUTHA RAJAGOPAL, M. D.'s most frequently prescribed drugs include Biktarvy, Atorvastatin Calcium, Pifeltro. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does AMUTHA RAJAGOPAL, M. D. accept Medicare?
AMUTHA RAJAGOPAL, M. D. appears in CMS Medicare data with 4,099 Part D claims and 157 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify AMUTHA RAJAGOPAL, M. D.'s credentials?
AMUTHA RAJAGOPAL, M. D.'s NPI is 1124465745 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