NPI registry status
Active
2026 NPPES data Internal Medicine Physician NPI 1881687390 M.D.
Verify on CMS → Mohammad Khamis, M.D.
Internal Medicine Physician in Chicago, Illinois.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 172,737 in Internal Medicine 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
7K
Medicare Part D claims · 156 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
87%
generic claims · 11% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$540.17
4 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Mohammad Khamis, M.D. filed 7,478 Medicare Part D claims in 2023 as an Internal Medicine Physician in Chicago, Illinois, prescribing 87% generic.
- 7K
- Part D claims, 2023
- 87%
- generic prescribing
- $540.17
- industry payments (Sunshine Act)
- ≥97th
- pct by Part D claim volume (lower-bound band)
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.
Mohammad Khamis, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
7,478 ≥ 97th percentile 97% of 1,370,886 prescribers are in lower value bands
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.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2023
◑
Board-eligible specialty (heuristic, not verified)
Mohammad Khamis, M.D. practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Mohammad Khamis, M.D.?
Quality data not reportedPrimary specialty
Internal Medicine Physician
Medicare Part D claims
7,478 175% vs specialty avg
Specialty distribution in Illinois
How Internal Medicine Physician compares to other specialties among Illinois 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 Internal Medicine 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).
Mohammad Khamis, M.D. appears in the CMS NPPES registry as an Internal Medicine Physician provider holding M.D. credentials at 1501 S CALIFORNIA AVE, Chicago, IL, 60608, with a listed phone of (773) 257-6552. NPI 1881687390 was issued on 08/30/2005.
Medicare Part D records for calendar year 2023 show 7,478 prescription claims written by this provider, covering 156 Medicare beneficiaries and totaling roughly $878K in drug spend, split 11% brand-name and 87% generic by claim count, with an opioid prescribing rate of 2.3%.
Internal Medicine Physician is a high-volume specialty nationwide, with 172,737 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
Provider Details
| NPI | 1881687390 |
|---|---|
| Specialty | Internal Medicine Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 08/30/2005 |
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 Mohammad Khamis, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$540
Largest payer
INTUITIVE SURGICAL, INC.
Most common payment type
Travel and Lodging
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 Mohammad Khamis, M.D.. To verify Mohammad Khamis, M.D.'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.
Brand vs generic prescribing mix · Typical
Mohammad Khamis, M.D. - brand share 11.0%
Internal Medicine Physician average
11% brand-name claims vs 87% generic, on 7,478 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.
7,478
Total Claims
$878K
Total Drug Cost
156
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 9,426
- Total Day Supply
- 263,337
- Brand vs Generic
- 11% brand / 87% generic
- Brand Drug Cost
- $443K
- Generic Drug Cost
- $426K
- Opioid Claims
- 170 (2.3% rate)
- Antibiotic Claims
- 212
Patient Demographics
- Average Patient Age
- 64.5 years
- Avg HCC Risk Score
- 1.63
- Gender Split
- 53% female / 47% male
- Age Distribution
- <65: 58, 65-74: 75, 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 Mohammad Khamis, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Diclofenac Sodium
Diclofenac Sodium
427 claims
- Famotidine
Famotidine
413 claims
- Albuterol Sulfate …
Albuterol Sulfate Hfa
400 claims
- Atorvastatin Calcium
Atorvastatin Calcium
269 claims
- Metoprolol Succinate
Metoprolol Succinate
261 claims
- Naproxen Sodium
Naproxen Sodium
257 claims
- Alprazolam
Alprazolam
226 claims
- Hydrochlorothiazide
Hydrochlorothiazide
213 claims
| Drug | Claims |
|---|---|
| Diclofenac Sodium | 427 |
| Famotidine | 413 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 400 |
| Atorvastatin Calcium | 269 |
| Metoprolol Succinate | 261 |
| Naproxen Sodium | 257 |
| Alprazolam | 226 |
| Hydrochlorothiazide | 213 |
| Amlodipine Besylate | 169 |
| Metformin Hcl | 165 |
* 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 Mohammad Khamis, M.D. fits within the Internal Medicine Physician landscape nationally.
172,737
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider
Mohammad Khamis, M.D.'s 7,478 claims are above 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 Khamis.
Dr. Hasan Abad
D.O.
Chicago, IL
Dr. Peter Abadeer
D.O.
Bloomington, IL
Dr. Pamela Abadi
D.O.
Winfield, IL
Dr. Motaz Abas
MD
Peoria, IL
Dr. Estefania Abasolo Lopez
MD
Chicago, IL
Compare Internal Medicine 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 Illinois medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Internal Medicine 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.
Healthcare Guides
Learn more about finding, verifying, and understanding healthcare providers.
How to Find a Doctor
Step-by-step guide to choosing a provider
Verify Credentials
Check NPI, board certification & license status
Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore Illinois
Frequently Asked Questions
What is Mohammad Khamis, M.D.'s specialty? ▼
Mohammad Khamis, M.D. specializes in Internal Medicine Physician and practices in Chicago, Illinois. Credentials: M.D..
How much does Mohammad Khamis, M.D. prescribe under Medicare Part D? ▼
In 2023, Mohammad Khamis, M.D. wrote 7,478 Medicare Part D claims totaling $878K in drug costs for 156 beneficiaries.
Where is Mohammad Khamis, M.D. located? ▼
Mohammad Khamis, M.D. is located at 1501 S CALIFORNIA AVE, Chicago, IL, 60608. Phone: (773) 257-6552.
What is Mohammad Khamis, M.D.'s NPI number? ▼
Mohammad Khamis, M.D.'s National Provider Identifier (NPI) is 1881687390, issued on 08/30/2005.
Does Mohammad Khamis, M.D. prescribe more brand-name or generic drugs? ▼
Mohammad Khamis, M.D.'s prescribing is 11% brand-name and 87% generic drugs by claim count, with $443K in brand drug costs.
Does Mohammad Khamis, M.D. prescribe opioids? ▼
Yes, Mohammad Khamis, M.D. had 170 opioid claims in 2023 with an opioid prescribing rate of 2.3%.
How many Internal Medicine Physician providers are there in the US? ▼
There are 172,737 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 Mohammad Khamis, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Mohammad Khamis, M.D.'s most frequently prescribed drugs include Diclofenac Sodium, Famotidine, Albuterol Sulfate Hfa. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Mohammad Khamis, M.D. accept Medicare? ▼
Mohammad Khamis, M.D. appears in CMS Medicare data with 7,478 Part D claims and 156 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Mohammad Khamis, M.D.'s credentials? ▼
Mohammad Khamis, M.D.'s NPI is 1881687390 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
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.