2026 NPPES data Surgical Oncology Physician NPI 1659711661 MD, PHD, FRCSC
Verify on CMS →

CARLOS CHAN, MD, PHD, FRCSC

Surgical Oncology Physician in IOWA CITY, Iowa. 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
85
Medicare Part D claims · 30 beneficiaries · Surgical Oncology Physician avg: 97
Generic prescribing
48%
generic claims · 52% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$32.55
1 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

CARLOS CHAN, MD, PHD, FRCSC filed 85 Medicare Part D claims in 2023 as a Surgical Oncology Physician in IOWA CITY, Iowa, prescribing 48% generic.

85
Part D claims, 2023
48%
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.

CARLOS CHAN, MD, PHD, FRCSC's Medicare Part D volume vs every U.S. prescriber

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

85 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)

CARLOS CHAN, MD, PHD, FRCSC 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 CARLOS CHAN, MD, PHD, FRCSC?

Quality data not reported

NPI registry status

Active

Issued 07/05/2013

NPI 1659711661

Primary specialty

Surgical Oncology Physician

Niche

1,410 US NPIs in this specialty

Medicare Part D claims

85 12% vs specialty avg

2023 prescription claims

Specialty avg: 97

Specialty distribution in Iowa

How Surgical Oncology Physician compares to other specialties among Iowa providers

Iowa providers

Surgical Oncology Physician share within Iowa

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

Specialty board-certification context

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

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

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

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

CARLOS CHAN, MD, PHD, FRCSC is a Surgical Oncology Physician provider practicing in IOWA CITY, Iowa, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD, PHD, FRCSC. NPI: 1659711661. 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.

CARLOS CHAN, MD, PHD, FRCSC appears in the CMS NPPES registry as a Surgical Oncology Physician provider holding MD, PHD, FRCSC credentials at 200 HAWKINS DR, IOWA CITY, IA, 52242, with a listed phone of (319) 356-2649. NPI 1659711661 was issued on 07/05/2013. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what CHAN 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 85 prescription claims written by this provider, covering 30 Medicare beneficiaries and totaling roughly $62K in drug spend, split 52% brand-name and 48% 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.

Surgical Oncology Physician is a narrow specialty nationwide, with 1,410 enrolled providers across 50 states and an average of 97 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 HAWKINS DR
IOWA CITY, IA 52242

Provider Details

NPI 1659711661
Specialty Surgical Oncology Physician
Credentials MD, PHD, FRCSC
Gender Male
NPI Issued 07/05/2013

Hospital and facility affiliations

Facilities where CARLOS CHAN, MD, PHD, FRCSC 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.

STATE UNIVERSITY OF IOWA
IOWA CITY, IA

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 CARLOS CHAN, MD, PHD, FRCSC. Source: openpaymentsdata.cms.gov.

Total received

$33

Largest payer

AngioDynamics, Inc.

Most common payment type

Food and Beverage

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

CARLOS CHAN, MD, PHD, FRCSC — brand share 52.0%
Specialty average (est.)

52% brand-name claims vs 48% generic, on 85 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.

85
Total Claims
$62K
Total Drug Cost
30
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
94
Total Day Supply
1,504
Brand vs Generic
52% brand / 48% generic
Brand Drug Cost
$61K
Generic Drug Cost
$440
Antibiotic Claims
20

Patient Demographics

Average Patient Age
70.9 years
Avg HCC Risk Score
2.47
Gender Split
53% female / 47% 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
Creon
Lipase/Protease/Amylase
37

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

Surgical Oncology Physician Overview

How CARLOS CHAN, MD, PHD, FRCSC fits within the Surgical Oncology Physician landscape nationally.

1,410
Surgical Oncology Physician Providers in US
50
States with Surgical Oncology Physician
97
Avg Claims per Provider

CARLOS CHAN, MD, PHD, FRCSC's 85 claims are below the specialty average of 97.

Nearby Surgical Oncology Physician Providers in Iowa

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

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

Frequently Asked Questions

What is CARLOS CHAN, MD, PHD, FRCSC's specialty?
CARLOS CHAN, MD, PHD, FRCSC specializes in Surgical Oncology Physician and practices in IOWA CITY, Iowa. Credentials: MD, PHD, FRCSC.
How much does CARLOS CHAN, MD, PHD, FRCSC prescribe under Medicare Part D?
In 2023, CARLOS CHAN, MD, PHD, FRCSC wrote 85 Medicare Part D claims totaling $62K in drug costs for 30 beneficiaries.
Where is CARLOS CHAN, MD, PHD, FRCSC located?
CARLOS CHAN, MD, PHD, FRCSC is located at 200 HAWKINS DR, IOWA CITY, IA, 52242. Phone: (319) 356-2649.
What is CARLOS CHAN, MD, PHD, FRCSC's NPI number?
CARLOS CHAN, MD, PHD, FRCSC's National Provider Identifier (NPI) is 1659711661, issued on 07/05/2013.
Does CARLOS CHAN, MD, PHD, FRCSC prescribe more brand-name or generic drugs?
CARLOS CHAN, MD, PHD, FRCSC's prescribing is 52% brand-name and 48% generic drugs by claim count, with $61K in brand drug costs.
How many Surgical Oncology Physician providers are there in the US?
There are 1,410 Surgical Oncology Physician providers across 50 states in the US. The average Surgical Oncology Physician provider writes 97 Medicare Part D claims per year.
What drugs does CARLOS CHAN, MD, PHD, FRCSC prescribe most often?
Based on 2023 Medicare Part D data, CARLOS CHAN, MD, PHD, FRCSC's most frequently prescribed drugs include Creon. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does CARLOS CHAN, MD, PHD, FRCSC accept Medicare?
CARLOS CHAN, MD, PHD, FRCSC appears in CMS Medicare data with 85 Part D claims and 30 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify CARLOS CHAN, MD, PHD, FRCSC's credentials?
CARLOS CHAN, MD, PHD, FRCSC's NPI is 1659711661 with credentials MD, PHD, FRCSC. 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