NPI registry status
Active
2026 NPPES data Internal Medicine Physician NPI 1689746166 MD
Verify on CMS → Mannul Wahab Ahmed, MD
Internal Medicine Physician in Chantilly, Virginia.
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 · 3K beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
88%
generic claims · 9% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Mannul Wahab Ahmed, MD filed 6,597 Medicare Part D claims in 2023 as a Internal Medicine Physician in Chantilly, Virginia, prescribing 88% generic.
- 7K
- Part D claims, 2023
- 88%
- generic prescribing
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.
Mannul Wahab Ahmed, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
6,597 Top 4% higher than 96% 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-eligible specialty (heuristic, not verified)
Mannul Wahab Ahmed, MD 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 Mannul Wahab Ahmed, MD?
Quality data not reportedPrimary specialty
Internal Medicine Physician
Medicare Part D claims
6,597 143% vs specialty avg
Specialty distribution in Virginia
How Internal Medicine Physician compares to other specialties among Virginia 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).
Mannul Wahab Ahmed, MD appears in the CMS NPPES registry as a Internal Medicine Physician provider holding MD credentials at 13893 REMBRANDT WAY, Chantilly, VA, 20151, with a listed phone of (703) 403-0460. NPI 1689746166 was issued on 11/14/2006.
Medicare Part D records for calendar year 2023 show 6,597 prescription claims written by this provider, covering 3,334 Medicare beneficiaries and totaling roughly $331K in drug spend, split 9% brand-name and 88% generic by claim count.
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 | 1689746166 |
|---|---|
| Specialty | Internal Medicine Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 11/14/2006 |
Brand vs generic prescribing mix · Generic-heavy
Mannul Wahab Ahmed, MD - brand share 9.0%
Internal Medicine Physician average
9% brand-name claims vs 88% generic, on 6,597 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.
6,597
Total Claims
$331K
Total Drug Cost
3,334
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 16,614
- Total Day Supply
- 488,025
- Brand vs Generic
- 9% brand / 88% generic
- Brand Drug Cost
- $223K
- Generic Drug Cost
- $105K
- Antibiotic Claims
- 102
Patient Demographics
- Average Patient Age
- 73.8 years
- Avg HCC Risk Score
- 1.14
- Gender Split
- 59% female / 41% male
- Age Distribution
- <65: 228, 65-74: 1,624, 75-84: 1,187, 85+: 295
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Mannul Wahab Ahmed, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
816 claims
- Amlodipine Besylate
Amlodipine Besylate
492 claims
- Lisinopril
Lisinopril
332 claims
- Losartan Potassium 308
Losartan Potassium
308 claims
- Metformin Hcl 225
Metformin Hcl
225 claims
- Levothyroxine Sodium 208
Levothyroxine Sodium
208 claims
- Hydrochlorothiazide 184
Hydrochlorothiazide
184 claims
- Albuterol Sulfate … 150
Albuterol Sulfate Hfa
150 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 816 |
| Amlodipine Besylate | 492 |
| Lisinopril | 332 |
| Losartan Potassium | 308 |
| Metformin Hcl | 225 |
| Levothyroxine Sodium | 208 |
| Hydrochlorothiazide | 184 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 150 |
| Glipizide | 144 |
| Pantoprazole Sodium | 138 |
* 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 Mannul Wahab Ahmed, MD 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
Mannul Wahab Ahmed, MD's 6,597 claims are above the specialty average of 2,716.
Nearby Internal Medicine Physician Providers in Virginia
Other clinicians with the same primary specialty enrolled in Virginia, drawn from the same CMS NPPES roster as Ahmed.
Dr. Caren Aaron
M.D.
Martinsville, VA
Dr. Michael Abadier
DO
Gloucester, VA
Dr. Salma Abbas
MD
Richmond, VA
Dr. Gohar Abbasi
MD
Chester, VA
Dr. Mustafa Abbasi
MD
Alexandria, VA
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 Virginia 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.
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Frequently Asked Questions
What is Mannul Wahab Ahmed, MD's specialty? ▼
Mannul Wahab Ahmed, MD specializes in Internal Medicine Physician and practices in Chantilly, Virginia. Credentials: MD.
How much does Mannul Wahab Ahmed, MD prescribe under Medicare Part D? ▼
In 2023, Mannul Wahab Ahmed, MD wrote 6,597 Medicare Part D claims totaling $331K in drug costs for 3,334 beneficiaries.
Where is Mannul Wahab Ahmed, MD located? ▼
Mannul Wahab Ahmed, MD is located at 13893 REMBRANDT WAY, Chantilly, VA, 20151. Phone: (703) 403-0460.
What is Mannul Wahab Ahmed, MD's NPI number? ▼
Mannul Wahab Ahmed, MD's National Provider Identifier (NPI) is 1689746166, issued on 11/14/2006.
Does Mannul Wahab Ahmed, MD prescribe more brand-name or generic drugs? ▼
Mannul Wahab Ahmed, MD's prescribing is 9% brand-name and 88% generic drugs by claim count, with $223K in brand drug costs.
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 Mannul Wahab Ahmed, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Mannul Wahab Ahmed, MD's most frequently prescribed drugs include Atorvastatin Calcium, Amlodipine Besylate, Lisinopril. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Mannul Wahab Ahmed, MD accept Medicare? ▼
Mannul Wahab Ahmed, MD appears in CMS Medicare data with 6,597 Part D claims and 3,334 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Mannul Wahab Ahmed, MD's credentials? ▼
Mannul Wahab Ahmed, MD's NPI is 1689746166 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
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.