NPI registry status
Active
2026 NPPES data Colon & Rectal Surgery Physician NPI 1801051255 D.O.
Verify on CMS → Robert West, D.O.
Colon & Rectal Surgery Physician in Chesterfield, 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 1,608 in Colon & Rectal Surgery 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
420
Medicare Part D claims · 137 beneficiaries · Colon & Rectal Surgery Physician avg: 196
Generic prescribing
44%
generic claims · 56% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$141.86
8 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
Robert West, D.O. filed 420 Medicare Part D claims in 2023 as a Colon & Rectal Surgery Physician in Chesterfield, Missouri, prescribing 44% generic.
- 420
- Part D claims, 2023
- 44%
- generic prescribing
- $141.86
- 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.
Robert West, D.O.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
420 Top 38% higher than 62% 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)
Robert West, D.O. 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 Robert West, D.O.?
Quality data not reportedPrimary specialty
Colon & Rectal Surgery Physician
Medicare Part D claims
420 114% vs specialty avg
Specialty distribution in Missouri
How Colon & Rectal Surgery 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 Colon & Rectal Surgery 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).
Robert West, D.O. appears in the CMS NPPES registry as a Colon & Rectal Surgery Physician provider holding D.O. credentials at 15510 OLIVE BLVD, Chesterfield, MO, 63017, with a listed phone of (314) 720-0050. NPI 1801051255 was issued on 07/25/2008.
Medicare Part D records for calendar year 2023 show 420 prescription claims written by this provider, covering 137 Medicare beneficiaries and totaling roughly $93K in drug spend, split 56% brand-name and 44% generic by claim count, with an opioid prescribing rate of 3.3%.
Colon & Rectal Surgery Physician is a narrow specialty nationwide, with 1,608 enrolled providers across 50 states and an average of 196 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 | 1801051255 |
|---|---|
| Specialty | Colon & Rectal Surgery Physician |
| Credentials | D.O. |
| Gender | Male |
| NPI Issued | 07/25/2008 |
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 Robert West, D.O.. Source: openpaymentsdata.cms.gov.
Total received
$142
Largest payer
Salix Pharmaceuticals, a division of Bausch Health US, LLC
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 · Brand-heavy
Robert West, D.O. - brand share 56.0%
Colon & Rectal Surgery Physician average
56% brand-name claims vs 44% generic, on 420 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.
420
Total Claims
$93K
Total Drug Cost
137
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 467
- Total Day Supply
- 8,409
- Brand vs Generic
- 56% brand / 44% generic
- Brand Drug Cost
- $85K
- Generic Drug Cost
- $8K
- Opioid Claims
- 14 (3.3% rate)
- Antibiotic Claims
- 47
Patient Demographics
- Average Patient Age
- 69.6 years
- Avg HCC Risk Score
- 1.29
- Gender Split
- 46% female / 54% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Robert West, D.O. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Hydrocortisone
Hydrocortisone
140 claims
- Linzess
Linzess
67 claims
- Clotrimazole-Betam… 50
Clotrimazole-Betamethasone
50 claims
- Amoxicillin 30
Amoxicillin
30 claims
- Trulance 14
Trulance
14 claims
- Rectiv 13
Rectiv
13 claims
- Amitiza 12
Amitiza
12 claims
| Drug | Claims |
|---|---|
| Hydrocortisone | 140 |
| Linzess Linaclotide | 67 |
| Clotrimazole-Betamethasone Clotrimazole/Betamethasone Dip | 50 |
| Amoxicillin | 30 |
| Trulance Plecanatide | 14 |
| Rectiv Nitroglycerin | 13 |
| Amitiza Lubiprostone | 12 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Colon & Rectal Surgery Physician Overview
How Robert West, D.O. fits within the Colon & Rectal Surgery Physician landscape nationally.
1,608
Colon & Rectal Surgery Physician Providers in US
50
States with Colon & Rectal Surgery Physician
196
Avg Claims per Provider
Robert West, D.O.'s 420 claims are above the specialty average of 196.
Nearby Colon & Rectal Surgery Physician Providers in Missouri
Other clinicians with the same primary specialty enrolled in Missouri, drawn from the same CMS NPPES roster as West.
Dr. Steven Abbadessa
D.O.
Saint Louis, MO
Dr. Robert Amajoyi
M.D.
Kansas City, MO
Dr. Todd Arends
M.D.
Chesterfield, MO
Dylan Carroll
Springfield, MO
Dr. Tiffany Chan
MD
Saint Louis, MO
Compare Colon & Rectal Surgery 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 Colon & Rectal Surgery 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 Robert West, D.O.'s specialty? ▼
Robert West, D.O. specializes in Colon & Rectal Surgery Physician and practices in Chesterfield, Missouri. Credentials: D.O..
How much does Robert West, D.O. prescribe under Medicare Part D? ▼
In 2023, Robert West, D.O. wrote 420 Medicare Part D claims totaling $93K in drug costs for 137 beneficiaries.
Where is Robert West, D.O. located? ▼
Robert West, D.O. is located at 15510 OLIVE BLVD, Chesterfield, MO, 63017. Phone: (314) 720-0050.
What is Robert West, D.O.'s NPI number? ▼
Robert West, D.O.'s National Provider Identifier (NPI) is 1801051255, issued on 07/25/2008.
Does Robert West, D.O. prescribe more brand-name or generic drugs? ▼
Robert West, D.O.'s prescribing is 56% brand-name and 44% generic drugs by claim count, with $85K in brand drug costs.
Does Robert West, D.O. prescribe opioids? ▼
Yes, Robert West, D.O. had 14 opioid claims in 2023 with an opioid prescribing rate of 3.3%.
How many Colon & Rectal Surgery Physician providers are there in the US? ▼
There are 1,608 Colon & Rectal Surgery Physician providers across 50 states in the US. The average Colon & Rectal Surgery Physician provider writes 196 Medicare Part D claims per year.
What drugs does Robert West, D.O. prescribe most often? ▼
Based on 2023 Medicare Part D data, Robert West, D.O.'s most frequently prescribed drugs include Hydrocortisone, Linzess, Clotrimazole-Betamethasone. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Robert West, D.O. accept Medicare? ▼
Robert West, D.O. appears in CMS Medicare data with 420 Part D claims and 137 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Robert West, D.O.'s credentials? ▼
Robert West, D.O.'s NPI is 1801051255 with credentials D.O.. 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.