NPI registry status
Active
2026 NPPES data Nephrology Physician NPI 1841412855 M.D.
Verify on CMS → Dar Shah, M.D.
Nephrology Physician in Fort Worth, Texas.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 10,534 in Nephrology 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
671
Medicare Part D claims · 134 beneficiaries · Nephrology Physician avg: 1K
Generic prescribing
81%
generic claims · 19% 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
Dar Shah, M.D. filed 671 Medicare Part D claims in 2023 as a Nephrology Physician in Fort Worth, Texas, prescribing 81% generic.
- 671
- Part D claims, 2023
- 81%
- 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.
Dar Shah, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
671 Top 31% higher than 69% 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)
Dar Shah, 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 Dar Shah, M.D.?
Quality data not reportedPrimary specialty
Nephrology Physician
Medicare Part D claims
671 54% vs specialty avg
Specialty distribution in Texas
How Nephrology Physician compares to other specialties among Texas 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 Nephrology 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).
Dar Shah, M.D. appears in the CMS NPPES registry as a Nephrology Physician provider holding M.D. credentials at 800 8TH AVENUE, Fort Worth, TX, 76104, with a listed phone of (817) 810-9800. NPI 1841412855 was issued on 05/02/2007.
Medicare Part D records for calendar year 2023 show 671 prescription claims written by this provider, covering 134 Medicare beneficiaries and totaling roughly $156K in drug spend, split 19% brand-name and 81% generic by claim count.
Nephrology Physician is a mid-sized specialty nationwide, with 10,534 enrolled providers across 55 states and an average of 1,454 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 | 1841412855 |
|---|---|
| Specialty | Nephrology Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 05/02/2007 |
License & disciplinary context - Texas TMB 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 ~77K Texas medical licensees in 2023 - they are NOT specific to Dar Shah, M.D.. To verify Dar Shah, M.D.'s current license status, search the TMB public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
344
Total board actions, Texas 2023
Across 334 cases
4.47
Actions per 1,000 licensees
Texas statewide rate
probation
Most common action type
94 cases
TMB 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 Texas disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Typical
Dar Shah, M.D. - brand share 19.0%
Nephrology Physician average
19% brand-name claims vs 81% generic, on 671 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.
671
Total Claims
$156K
Total Drug Cost
134
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,425
- Total Day Supply
- 42,446
- Brand vs Generic
- 19% brand / 81% generic
- Brand Drug Cost
- $127K
- Generic Drug Cost
- $29K
Patient Demographics
- Average Patient Age
- 73.0 years
- Avg HCC Risk Score
- 3.87
- Gender Split
- 45% female / 55% male
- Age Distribution
- <65: 20, 65-74: 50, 75-84: 51, 85+: 13
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Dar Shah, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Farxiga
Farxiga
67 claims
- Lisinopril
Lisinopril
42 claims
- Furosemide
Furosemide
39 claims
- Sevelamer Carbonate
Sevelamer Carbonate
36 claims
- Amlodipine Besylate
Amlodipine Besylate
34 claims
- Losartan Potassium
Losartan Potassium
31 claims
- Hydralazine Hcl
Hydralazine Hcl
30 claims
- Spironolactone
Spironolactone
29 claims
| Drug | Claims |
|---|---|
| Farxiga Dapagliflozin Propanediol | 67 |
| Lisinopril | 42 |
| Furosemide | 39 |
| Sevelamer Carbonate | 36 |
| Amlodipine Besylate | 34 |
| Losartan Potassium | 31 |
| Hydralazine Hcl | 30 |
| Spironolactone | 29 |
| Metoprolol Succinate | 28 |
| Velphoro Sucroferric Oxyhydroxide | 24 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Nephrology Physician Overview
How Dar Shah, M.D. fits within the Nephrology Physician landscape nationally.
10,534
Nephrology Physician Providers in US
55
States with Nephrology Physician
1,454
Avg Claims per Provider
Dar Shah, M.D.'s 671 claims are below the specialty average of 1,454.
Nearby Nephrology Physician Providers in Texas
Other clinicians with the same primary specialty enrolled in Texas, drawn from the same CMS NPPES roster as Shah.
Dr. Bernardino Abaya
M.D.
Houston, TX
Dr. Aisha Abbasi
MD
Conroe, TX
Dr. Fadi Abouzahr
MD
San Antonio, TX
Dr. Koshy Abraham
MD
Fort Worth, TX
Dr. Ala Abudayyeh
MD
Houston, TX
Compare Nephrology 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 Texas medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Nephrology 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 Dar Shah, M.D.'s specialty? ▼
Dar Shah, M.D. specializes in Nephrology Physician and practices in Fort Worth, Texas. Credentials: M.D..
How much does Dar Shah, M.D. prescribe under Medicare Part D? ▼
In 2023, Dar Shah, M.D. wrote 671 Medicare Part D claims totaling $156K in drug costs for 134 beneficiaries.
Where is Dar Shah, M.D. located? ▼
Dar Shah, M.D. is located at 800 8TH AVENUE, Fort Worth, TX, 76104. Phone: (817) 810-9800.
What is Dar Shah, M.D.'s NPI number? ▼
Dar Shah, M.D.'s National Provider Identifier (NPI) is 1841412855, issued on 05/02/2007.
Does Dar Shah, M.D. prescribe more brand-name or generic drugs? ▼
Dar Shah, M.D.'s prescribing is 19% brand-name and 81% generic drugs by claim count, with $127K in brand drug costs.
How many Nephrology Physician providers are there in the US? ▼
There are 10,534 Nephrology Physician providers across 55 states in the US. The average Nephrology Physician provider writes 1,454 Medicare Part D claims per year.
What drugs does Dar Shah, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Dar Shah, M.D.'s most frequently prescribed drugs include Farxiga, Lisinopril, Furosemide. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Dar Shah, M.D. accept Medicare? ▼
Dar Shah, M.D. appears in CMS Medicare data with 671 Part D claims and 134 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Dar Shah, M.D.'s credentials? ▼
Dar Shah, M.D.'s NPI is 1841412855 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.