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 1,642 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
348
Medicare Part D claims · 126 beneficiaries · Colon & Rectal Surgery Physician avg: 210
Generic prescribing
56%
generic claims · 44% 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, 2024
What the federal data shows
Robert West, D.O. filed 348 Medicare Part D claims in 2024 as a Colon & Rectal Surgery Physician in Chesterfield, Missouri, prescribing 56% generic.
- 348
- Part D claims, 2024
- 56%
- generic prescribing
- $141.86
- industry payments (Sunshine Act)
- ≥56th
- 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.
Federal trust snapshot
What official records show about Robert West, D.O.
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1801051255), first enumerated 07/25/2008.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 348 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Practices in an ABMS-board-eligible specialty; board certification not confirmed in federal records.
- Reported
Industry payment transparency
$141.86 in reported industry payments (8 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1801051255 · Colon & Rectal Surgery Physician
NPI-10 · ENUM-MID · TAX-NARROW · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1801051255
- ENUM-MID 2008
- TAX-NARROW 1,642
- RX-LIGHT 348
- BOOK-THIN 25 in Missouri
- PHOTO-ENUM Janet Lee · 2008
Robert West, D.O.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
348 ≥ 56th percentile 56% of 1,416,883 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 · 2024
◑
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
348 66% 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).
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 · Above average
Robert West, D.O. - brand share 44.0%
Colon & Rectal Surgery Physician average
44% brand-name claims vs 56% generic, on 348 2024 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 2024.
348
Total Claims
$53K
Total Drug Cost
126
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 379.333
- Total Day Supply
- 6,690
- Brand vs Generic
- 44% brand / 56% generic
- Brand Drug Cost
- $45K
- Generic Drug Cost
- $8K
- Opioid Claims
- 23 (6.6% rate)
- Antibiotic Claims
- 40
Patient Demographics
- Average Patient Age
- 70.6 years
- Avg HCC Risk Score
- 1.19
- Gender Split
- 51% female / 49% male
- Age Distribution
- <65: 24, 65-74: 58, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Robert West, D.O. prescribes most
Top Medicare Part D drugs by claim count, 2024
- Hydrocortisone
Hydrocortisone
90 claims
- Clotrimazole-Betam…
Clotrimazole-Betamethasone
61 claims
- Linzess
Linzess
38 claims
- Lubiprostone 13
Lubiprostone
13 claims
- Oxycodone-Acetamin… 13
Oxycodone-Acetaminophen
13 claims
- Lidocaine-Prilocaine 12
Lidocaine-Prilocaine
12 claims
- Amoxicillin 11
Amoxicillin
11 claims
| Drug | Claims |
|---|---|
| Hydrocortisone | 90 |
| Clotrimazole-Betamethasone Clotrimazole/Betamethasone Dip | 61 |
| Linzess Linaclotide | 38 |
| Lubiprostone | 13 |
| Oxycodone-Acetaminophen Oxycodone Hcl/Acetaminophen | 13 |
| Lidocaine-Prilocaine Lidocaine/Prilocaine | 12 |
| Amoxicillin | 11 |
* 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.
1,642
Colon & Rectal Surgery Physician Providers in US
50
States with Colon & Rectal Surgery Physician
210
Avg Claims per Provider
Robert West, D.O.'s 348 claims are above the specialty average of 210.
Nationwide Colon & Rectal Surgery Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for West, both outside Missouri so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2008)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
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.
One of 25 Colon & Rectal Surgery Physician providers enrolled in Missouri, 5 are shown here.
Dr. Steven Abbadessa
D.O.
Saint Louis, MO
Dr. Robert Amajoyi
M.D.
Kansas City, MO
Dr. Todd Arends
M.D.
Chesterfield, MO
Dr. Tiffany Chan
MD
Saint Louis, MO
Patrick Chizek
Saint Louis, MO
Compare Colon & Rectal Surgery Physician nationally: see state-by-state distribution →
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 2024, Robert West, D.O. wrote 348 Medicare Part D claims totaling $53K in drug costs for 126 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 44% brand-name and 56% generic drugs by claim count, with $45K in brand drug costs.
Does Robert West, D.O. prescribe opioids? ▼
Yes, Robert West, D.O. had 23 opioid claims in 2024 with an opioid prescribing rate of 6.6%.
How many Colon & Rectal Surgery Physician providers are there in the US? ▼
There are 1,642 Colon & Rectal Surgery Physician providers across 50 states in the US. The average Colon & Rectal Surgery Physician provider writes 210 Medicare Part D claims per year.
What drugs does Robert West, D.O. prescribe most often? ▼
Based on 2024 Medicare Part D data, Robert West, D.O.'s most frequently prescribed drugs include Hydrocortisone, Clotrimazole-Betamethasone, Linzess. 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 348 Part D claims and 126 Medicare beneficiaries in 2024. 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 (2024). 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 August 2026 (NPPES) / 2024 (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 August 2026.