2026 NPPES data Internal Medicine Physician NPI 1598346918 MD
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SOHIUB ASSAF, MD

Internal Medicine Physician in PEORIA, Illinois. 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
360
Medicare Part D claims · 43 beneficiaries · Internal Medicine Physician avg: 3K
Industry payments
$125.19
6 payments · CMS Open Payments (Sunshine Act)
What the federal data reveals: SOHIUB ASSAF, MD is a Internal Medicine Physician ([object Object]) practicing in PEORIA, Illinois with a Medicare Part D prescribing footprint of 360 claims across 43 beneficiaries . Industry payments of $125.19 across 6 transactions are disclosed under CMS Open Payments (Sunshine Act).

What stands out: SOHIUB ASSAF, MD filed 360 Medicare Part D claims in 2023 across PEORIA, Illinois. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

SOHIUB ASSAF, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 7 hospital affiliations — signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

SOHIUB ASSAF, MD at a glance

Quality data not reported

NPI registry status

Active

Issued 04/16/2021

NPI 1598346918

Primary specialty

Internal Medicine Physician

High-volume

172,858 US NPIs in this specialty

Medicare Part D claims

360 87% vs specialty avg

2023 prescription claims

Specialty avg: 2,716

Specialty distribution in Illinois

How Internal Medicine Physician compares to other specialties among Illinois providers

Illinois providers

Internal Medicine Physician share within Illinois

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

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).

SOHIUB ASSAF, MD is a Internal Medicine Physician provider practicing in PEORIA, Illinois, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD. NPI: 1598346918. 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.

SOHIUB ASSAF, MD appears in the CMS NPPES registry as a Internal Medicine Physician provider holding MD credentials at 530 NE GLEN OAK AVE, PEORIA, IL, 61637, with a listed phone of (309) 624-8818. NPI 1598346918 was issued on 04/16/2021. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what ASSAF 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 360 prescription claims written by this provider, covering 43 Medicare beneficiaries and totaling roughly $47K in drug spend. 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

530 NE GLEN OAK AVE
PEORIA, IL 61637

Provider Details

NPI 1598346918
Specialty Internal Medicine Physician
Credentials MD
Gender Male
NPI Issued 04/16/2021

Hospital and facility affiliations

Facilities where SOHIUB ASSAF, MD 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.

DECATUR MEMORIAL HOSPITAL
★★★☆☆ 3/5
DECATUR, IL
Acute Care Hospitals
CMS CCN: 140135
CARLE HEALTH CARE INCORPORATED
PEORIA, IL
FIRST DOCS PC
PALOS HEIGHTS, IL
HEARTLAND COMMUNITY HEALTH CLINIC
PEORIA, IL
METHODIST MEDICAL CENTER OF ILLINOIS
PEORIA, IL
OSF MULTI-SPECIALTY GROUP
PEORIA, IL

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 SOHIUB ASSAF, MD. Source: openpaymentsdata.cms.gov.

Total received

$125

Largest payer

ZOLL Services LLC (A/K/A ZOLL LifeCor Corp)

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 — Illinois IDFPR 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 ~42K Illinois medical licensees in 2023 — they are NOT specific to SOHIUB ASSAF, MD. To verify SOHIUB ASSAF, MD's current license status, search the IDFPR public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

106
Total board actions, Illinois 2023
Across 103 cases
2.52
Actions per 1,000 licensees
Illinois statewide rate
probation
Most common action type
38 cases

IDFPR 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 Illinois 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.

360
Total Claims
$47K
Total Drug Cost
43
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
672
Total Day Supply
19,789
Generic Drug Cost
$6K

Patient Demographics

Average Patient Age
65.0 years
Avg HCC Risk Score
2.19
Gender Split
56% female / 44% male
Age Distribution
<65: 16, 65-74: 17, 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.

Drug Claims
Lisinopril
27
Atorvastatin Calcium
25
Gabapentin
18
Albuterol Sulfate Hfa
Albuterol Sulfate
16
Amlodipine Besylate
16
Omeprazole
15
Pantoprazole Sodium
14
Hydrochlorothiazide
11
Simvastatin
11

* 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 SOHIUB ASSAF, MD 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

SOHIUB ASSAF, MD's 360 claims are below the specialty average of 2,716.

Nearby Internal Medicine Physician Providers in Illinois

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

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

Frequently Asked Questions

What is SOHIUB ASSAF, MD's specialty?
SOHIUB ASSAF, MD specializes in Internal Medicine Physician and practices in PEORIA, Illinois. Credentials: MD.
How much does SOHIUB ASSAF, MD prescribe under Medicare Part D?
In 2023, SOHIUB ASSAF, MD wrote 360 Medicare Part D claims totaling $47K in drug costs for 43 beneficiaries.
Where is SOHIUB ASSAF, MD located?
SOHIUB ASSAF, MD is located at 530 NE GLEN OAK AVE, PEORIA, IL, 61637. Phone: (309) 624-8818.
What is SOHIUB ASSAF, MD's NPI number?
SOHIUB ASSAF, MD's National Provider Identifier (NPI) is 1598346918, issued on 04/16/2021.
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 SOHIUB ASSAF, MD prescribe most often?
Based on 2023 Medicare Part D data, SOHIUB ASSAF, MD's most frequently prescribed drugs include Lisinopril, Atorvastatin Calcium, Gabapentin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does SOHIUB ASSAF, MD accept Medicare?
SOHIUB ASSAF, MD appears in CMS Medicare data with 360 Part D claims and 43 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify SOHIUB ASSAF, MD's credentials?
SOHIUB ASSAF, MD's NPI is 1598346918 with credentials MD. 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