NPI registry status
Active
2026 NPPES data Gastroenterology Physician NPI 1346264959 M.D.
Verify on CMS → Andrew Brock, M.D.
Gastroenterology Physician in Charleston, South Carolina.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 17,061 in Gastroenterology 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
790
Medicare Part D claims · 462 beneficiaries · Gastroenterology Physician avg: 848
Generic prescribing
77%
generic claims · 23% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Andrew Brock, M.D. filed 790 Medicare Part D claims in 2024 as a Gastroenterology Physician in Charleston, South Carolina, prescribing 77% generic.
- 790
- Part D claims, 2024
- 77%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥70th
- 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 Andrew Brock, M.D.
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 1346264959), first enumerated 07/27/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 790 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
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- 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 1346264959 · Gastroenterology Physician
NPI-10 · ENUM-LEGACY · TAX-MID · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1346264959
- ENUM-LEGACY 2006
- TAX-MID 17K Gastroenterology Physician
- RX-LIGHT 790
- BOOK-THIN 254 in South Carolina
- PHOTO-ENUM Samer Eldika · 2006
Andrew Brock, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
790 ≥ 70th percentile 70% 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 certification likely (heuristic, not verified)
Andrew Brock, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Andrew Brock, M.D.?
Quality data not reportedPrimary specialty
Gastroenterology Physician
Medicare Part D claims
790 7% vs specialty avg
Specialty distribution in South Carolina
How Gastroenterology Physician compares to other specialties among South Carolina 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 Gastroenterology 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 | 1346264959 |
|---|---|
| Specialty | Gastroenterology Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 07/27/2006 |
Hospital and facility affiliations
Facilities where Andrew Brock, M.D. bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
University Medical Associates OF The Medical University OF South Carol
Charleston, SC
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Brand vs generic prescribing mix · Typical
Andrew Brock, M.D. - brand share 23.0%
Gastroenterology Physician average
23% brand-name claims vs 77% generic, on 790 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.
790
Total Claims
$79K
Total Drug Cost
462
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,053.233
- Total Day Supply
- 19,129
- Brand vs Generic
- 23% brand / 77% generic
- Brand Drug Cost
- $60K
- Generic Drug Cost
- $20K
- Antibiotic Claims
- 28
Patient Demographics
- Average Patient Age
- 69.2 years
- Avg HCC Risk Score
- 1.75
- Gender Split
- 56% female / 44% male
- Age Distribution
- <65: 91, 65-74: 243, 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 Andrew Brock, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2024
- Gavilyte-G
Gavilyte-G
205 claims
- Omeprazole
Omeprazole
148 claims
- Peg-3350 And Elect…
Peg-3350 And Electrolytes
113 claims
- Gavilyte-C 74
Gavilyte-C
74 claims
- Famotidine 28
Famotidine
28 claims
- Linzess 27
Linzess
27 claims
- Motegrity 25
Motegrity
25 claims
- Pantoprazole Sodium 25
Pantoprazole Sodium
25 claims
| Drug | Claims |
|---|---|
| Gavilyte-G Peg3350/Sod Sulf,bicarb,cl/Kcl | 205 |
| Omeprazole | 148 |
| Peg-3350 And Electrolytes Peg3350/Sod Sulf,bicarb,cl/Kcl | 113 |
| Gavilyte-C Peg3350/Sod Sulf,bicarb,cl/Kcl | 74 |
| Famotidine | 28 |
| Linzess Linaclotide | 27 |
| Motegrity Prucalopride Succinate | 25 |
| Pantoprazole Sodium | 25 |
| Lubiprostone | 19 |
| Dicyclomine Hcl | 16 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Gastroenterology Physician Overview
How Andrew Brock, M.D. fits within the Gastroenterology Physician landscape nationally.
17,061
Gastroenterology Physician Providers in US
54
States with Gastroenterology Physician
848
Avg Claims per Provider
Andrew Brock, M.D.'s 790 claims are below the specialty average of 848.
Nationwide Gastroenterology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Brock, both outside South Carolina so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Gastroenterology Physician Providers in South Carolina
Other clinicians with the same primary specialty enrolled in South Carolina, drawn from the same CMS NPPES roster as Brock.
One of 254 Gastroenterology Physician providers enrolled in South Carolina, 5 are shown here.
Dr. Sebastian Abadie
M.D.
Murrells Inlet, SC
Dr. Judd Adelman
MD
North Charleston, SC
Dr. Olayinka Afolabi
M.D.
Florence, SC
Dr. Amit Agrawal
MD
Charleston, SC
Dr. Amir Ahmed
M.D.
Columbia, SC
Compare Gastroenterology Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Andrew Brock, M.D.'s specialty? ▼
Andrew Brock, M.D. specializes in Gastroenterology Physician and practices in Charleston, South Carolina. Credentials: M.D..
How much does Andrew Brock, M.D. prescribe under Medicare Part D? ▼
In 2024, Andrew Brock, M.D. wrote 790 Medicare Part D claims totaling $79K in drug costs for 462 beneficiaries.
Where is Andrew Brock, M.D. located? ▼
Andrew Brock, M.D. is located at 171 ASHLEY AVE, Charleston, SC, 29425. Phone: (843) 792-1414.
What is Andrew Brock, M.D.'s NPI number? ▼
Andrew Brock, M.D.'s National Provider Identifier (NPI) is 1346264959, issued on 07/27/2006.
Does Andrew Brock, M.D. prescribe more brand-name or generic drugs? ▼
Andrew Brock, M.D.'s prescribing is 23% brand-name and 77% generic drugs by claim count, with $60K in brand drug costs.
How many Gastroenterology Physician providers are there in the US? ▼
There are 17,061 Gastroenterology Physician providers across 54 states in the US. The average Gastroenterology Physician provider writes 848 Medicare Part D claims per year.
What drugs does Andrew Brock, M.D. prescribe most often? ▼
Based on 2024 Medicare Part D data, Andrew Brock, M.D.'s most frequently prescribed drugs include Gavilyte-G, Omeprazole, Peg-3350 And Electrolytes. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Andrew Brock, M.D. accept Medicare? ▼
Andrew Brock, M.D. appears in CMS Medicare data with 790 Part D claims and 462 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Andrew Brock, M.D.'s credentials? ▼
Andrew Brock, M.D.'s NPI is 1346264959 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 (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.