NPI registry status
Active
2026 NPPES data Colon & Rectal Surgery Physician NPI 1063684850 M.D.
Verify on CMS → Marjun Duldulao, M.D.
Colon & Rectal Surgery Physician in Los Angeles, California.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 1,608 in Colon & Rectal Surgery Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
46
Medicare Part D claims · 28 beneficiaries · Colon & Rectal Surgery Physician avg: 196
Industry payments
$434.92
5 payments · CMS Open Payments (Sunshine Act)
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Marjun Duldulao, M.D. filed 46 Medicare Part D claims in 2023 as a Colon & Rectal Surgery Physician in Los Angeles, California.
- 46
- Part D claims, 2023
- 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.
Marjun Duldulao, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
46 0th percentile higher than 0% of 1,370,886 prescribers
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)
Marjun Duldulao, 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 Marjun Duldulao, M.D.?
Quality data not reportedPrimary specialty
Colon & Rectal Surgery Physician
Medicare Part D claims
46 77% vs specialty avg
Specialty distribution in California
How Colon & Rectal Surgery Physician compares to other specialties among California providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Colon & Rectal Surgery Physician. Verify directly:
How MIPS and board certification work
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).
Marjun Duldulao, M.D. appears in the CMS NPPES registry as a Colon & Rectal Surgery Physician provider holding M.D. credentials at 1450 SAN PABLO STREET SUITE 6200, Los Angeles, CA, 90089, with a listed phone of (323) 865-3690. NPI 1063684850 was issued on 04/01/2008.
Medicare Part D records for calendar year 2023 show 46 prescription claims written by this provider, covering 28 Medicare beneficiaries and totaling roughly $1K in drug spend.
Colon & Rectal Surgery Physician is a narrow specialty nationwide, with 1,608 enrolled providers across 50 states and an average of 196 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
Provider Details
| NPI | 1063684850 |
|---|---|
| Specialty | Colon & Rectal Surgery Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 04/01/2008 |
Hospital and facility affiliations
Facilities where Marjun Duldulao, 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.
Usc Care Medical Group Inc
Los Angeles, CA
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 Marjun Duldulao, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$435
Largest payer
Guard Medical 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.
License & disciplinary context - California MBC 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~150K California medical licensees in 2023 - they are NOT specific to Marjun Duldulao, M.D.. To verify Marjun Duldulao, M.D.'s current license status, search the MBC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
576
Total board actions, California 2023
Across 556 cases
3.84
Actions per 1,000 licensees
California statewide rate
probation
Most common action type
186 cases
MBC publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the California disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
46
Total Claims
$1K
Total Drug Cost
28
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 56
- Total Day Supply
- 1,079
- Generic Drug Cost
- $1K
Patient Demographics
- Average Patient Age
- 71.4 years
- Avg HCC Risk Score
- 2.35
- Gender Split
- 54% female / 46% 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 |
|---|---|
| Gabapentin | 14 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Colon & Rectal Surgery Physician Overview
How Marjun Duldulao, M.D. fits within the Colon & Rectal Surgery Physician landscape nationally.
1,608
Colon & Rectal Surgery Physician Providers in US
50
States with Colon & Rectal Surgery Physician
196
Avg Claims per Provider
Marjun Duldulao, M.D.'s 46 claims are below the specialty average of 196.
Nearby Colon & Rectal Surgery Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Duldulao.
Dr. Kenneth Aaron
M.D.
Newport Beach, CA
Dr. Michael Abel
M.D.
San Francisco, CA
Dr. Piyush Aggarwal
MD
Walnut Creek, CA
Dr. Allison Aka
MD
Loma Linda, CA
Dr. Ahmed Alkoraishi
MD
Hayward, CA
Compare Colon & Rectal Surgery Physician nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the California medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Colon & Rectal Surgery Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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Frequently Asked Questions
What is Marjun Duldulao, M.D.'s specialty? ▼
Marjun Duldulao, M.D. specializes in Colon & Rectal Surgery Physician and practices in Los Angeles, California. Credentials: M.D..
How much does Marjun Duldulao, M.D. prescribe under Medicare Part D? ▼
In 2023, Marjun Duldulao, M.D. wrote 46 Medicare Part D claims totaling $1K in drug costs for 28 beneficiaries.
Where is Marjun Duldulao, M.D. located? ▼
Marjun Duldulao, M.D. is located at 1450 SAN PABLO STREET SUITE 6200, Los Angeles, CA, 90089. Phone: (323) 865-3690.
What is Marjun Duldulao, M.D.'s NPI number? ▼
Marjun Duldulao, M.D.'s National Provider Identifier (NPI) is 1063684850, issued on 04/01/2008.
How many Colon & Rectal Surgery Physician providers are there in the US? ▼
There are 1,608 Colon & Rectal Surgery Physician providers across 50 states in the US. The average Colon & Rectal Surgery Physician provider writes 196 Medicare Part D claims per year.
What drugs does Marjun Duldulao, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Marjun Duldulao, M.D.'s most frequently prescribed drugs include Gabapentin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Marjun Duldulao, M.D. accept Medicare? ▼
Marjun Duldulao, M.D. appears in CMS Medicare data with 46 Part D claims and 28 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Marjun Duldulao, M.D.'s credentials? ▼
Marjun Duldulao, M.D.'s NPI is 1063684850 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
View source datasets and methodology notes
- 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
Compiled from official public sources by the PlainDoctor editorial team.