NPI registry status
Active
2026 NPPES data Rheumatology Physician NPI 1255583407 MD
Verify on CMS → Farhat Shereen, MD
Rheumatology Physician in Lake Saint Louis, Missouri.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 6,181 in Rheumatology 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
1K
Medicare Part D claims · 199 beneficiaries · Rheumatology Physician avg: 2K
Generic prescribing
90%
generic claims · 10% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$154.67
3 payments · CMS Open Payments (Sunshine Act)
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
Farhat Shereen, MD filed 1,182 Medicare Part D claims in 2023 as a Rheumatology Physician in Lake Saint Louis, Missouri, prescribing 90% generic.
- 1K
- Part D claims, 2023
- 90%
- generic prescribing
- $154.67
- industry payments (Sunshine Act)
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.
Farhat Shereen, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
1,182 Top 23% higher than 77% 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)
Farhat Shereen, 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 Farhat Shereen, MD?
Quality data not reportedPrimary specialty
Rheumatology Physician
Medicare Part D claims
1,182 42% vs specialty avg
Specialty distribution in Missouri
How Rheumatology Physician compares to other specialties among Missouri 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 Rheumatology 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).
Farhat Shereen, MD appears in the CMS NPPES registry as a Rheumatology Physician provider holding MD credentials at 300 MEDICAL PLZ, Lake Saint Louis, MO, 63367, with a listed phone of (636) 625-8300. NPI 1255583407 was issued on 10/21/2008.
Medicare Part D records for calendar year 2023 show 1,182 prescription claims written by this provider, covering 199 Medicare beneficiaries and totaling roughly $808K in drug spend, split 10% brand-name and 90% generic by claim count.
Rheumatology Physician is a mid-sized specialty nationwide, with 6,181 enrolled providers across 52 states and an average of 2,054 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 | 1255583407 |
|---|---|
| Specialty | Rheumatology Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 10/21/2008 |
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 Farhat Shereen, MD. Source: openpaymentsdata.cms.gov.
Total received
$155
Largest payer
Phathom Pharmaceuticals, 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 · Typical
Farhat Shereen, MD - brand share 10.0%
Rheumatology Physician average
10% brand-name claims vs 90% generic, on 1,182 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.
1,182
Total Claims
$808K
Total Drug Cost
199
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 2,309
- Total Day Supply
- 67,925
- Brand vs Generic
- 10% brand / 90% generic
- Brand Drug Cost
- $770K
- Generic Drug Cost
- $37K
Patient Demographics
- Average Patient Age
- 72.8 years
- Avg HCC Risk Score
- 1.93
- Gender Split
- 74% female / 26% male
- Age Distribution
- <65: 25, 65-74: 79, 75-84: 74, 85+: 21
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Farhat Shereen, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Prednisone
Prednisone
236 claims
- Hydroxychloroquine…
Hydroxychloroquine Sulfate
235 claims
- Methotrexate
Methotrexate
209 claims
- Folic Acid 83
Folic Acid
83 claims
- Duloxetine Hcl 69
Duloxetine Hcl
69 claims
- Leflunomide 50
Leflunomide
50 claims
- Allopurinol 27
Allopurinol
27 claims
- Meloxicam 26
Meloxicam
26 claims
| Drug | Claims |
|---|---|
| Prednisone | 236 |
| Hydroxychloroquine Sulfate | 235 |
| Methotrexate Methotrexate Sodium | 209 |
| Folic Acid | 83 |
| Duloxetine Hcl | 69 |
| Leflunomide | 50 |
| Allopurinol | 27 |
| Meloxicam | 26 |
| Naproxen | 22 |
| Cosentyx Sensoready Pen Secukinumab | 17 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Rheumatology Physician Overview
How Farhat Shereen, MD fits within the Rheumatology Physician landscape nationally.
6,181
Rheumatology Physician Providers in US
52
States with Rheumatology Physician
2,054
Avg Claims per Provider
Farhat Shereen, MD's 1,182 claims are below the specialty average of 2,054.
Nearby Rheumatology Physician Providers in Missouri
Other clinicians with the same primary specialty enrolled in Missouri, drawn from the same CMS NPPES roster as Shereen.
Dr. Zaki Abou Zahr
M.D.
Columbia, MO
Dr. Anam Ahmad
MD
Chesterfield, MO
Dr. Stephen Armstrong
MD
Springfield, MO
Dr. Romila Aslam
M.D.
Bridgeton, MO
Dr. John Atkinson
MD
Saint Louis, MO
Compare Rheumatology 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 Missouri medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Rheumatology 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
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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 Missouri
Frequently Asked Questions
What is Farhat Shereen, MD's specialty? ▼
Farhat Shereen, MD specializes in Rheumatology Physician and practices in Lake Saint Louis, Missouri. Credentials: MD.
How much does Farhat Shereen, MD prescribe under Medicare Part D? ▼
In 2023, Farhat Shereen, MD wrote 1,182 Medicare Part D claims totaling $808K in drug costs for 199 beneficiaries.
Where is Farhat Shereen, MD located? ▼
Farhat Shereen, MD is located at 300 MEDICAL PLZ, Lake Saint Louis, MO, 63367. Phone: (636) 625-8300.
What is Farhat Shereen, MD's NPI number? ▼
Farhat Shereen, MD's National Provider Identifier (NPI) is 1255583407, issued on 10/21/2008.
Does Farhat Shereen, MD prescribe more brand-name or generic drugs? ▼
Farhat Shereen, MD's prescribing is 10% brand-name and 90% generic drugs by claim count, with $770K in brand drug costs.
How many Rheumatology Physician providers are there in the US? ▼
There are 6,181 Rheumatology Physician providers across 52 states in the US. The average Rheumatology Physician provider writes 2,054 Medicare Part D claims per year.
What drugs does Farhat Shereen, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Farhat Shereen, MD's most frequently prescribed drugs include Prednisone, Hydroxychloroquine Sulfate, Methotrexate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Farhat Shereen, MD accept Medicare? ▼
Farhat Shereen, MD appears in CMS Medicare data with 1,182 Part D claims and 199 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Farhat Shereen, MD's credentials? ▼
Farhat Shereen, MD's NPI is 1255583407 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.