NPI registry status
Active
2026 NPPES data Gastroenterology Physician NPI 1912963091 M. D.
Verify on CMS → Charles Parker, M. D.
Gastroenterology Physician in South Boston, Virginia.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 16,567 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
2K
Medicare Part D claims · 206 beneficiaries · Gastroenterology Physician avg: 833
Generic prescribing
93%
generic claims · 6% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$225.47
10 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
Charles Parker, M. D. filed 2,410 Medicare Part D claims in 2023 as a Gastroenterology Physician in South Boston, Virginia, prescribing 93% generic.
- 2K
- Part D claims, 2023
- 93%
- generic prescribing
- $225.47
- 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.
Charles Parker, M. D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
2,410 Top 14% higher than 86% 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)
Charles Parker, 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 Charles Parker, M. D.?
Quality data not reportedPrimary specialty
Gastroenterology Physician
Medicare Part D claims
2,410 189% vs specialty avg
Specialty distribution in Virginia
How Gastroenterology Physician compares to other specialties among Virginia 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).
Charles Parker, M. D. appears in the CMS NPPES registry as a Gastroenterology Physician provider holding M. D. credentials at 1627 SEYMOUR DR, South Boston, VA, 24592, with a listed phone of (434) 572-1171. NPI 1912963091 was issued on 04/26/2006.
Medicare Part D records for calendar year 2023 show 2,410 prescription claims written by this provider, covering 206 Medicare beneficiaries and totaling roughly $100K in drug spend, split 6% brand-name and 93% generic by claim count, with an opioid prescribing rate of 3.8%.
Gastroenterology Physician is a mid-sized specialty nationwide, with 16,567 enrolled providers across 54 states and an average of 833 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 | 1912963091 |
|---|---|
| Specialty | Gastroenterology Physician |
| Credentials | M. D. |
| Gender | Male |
| NPI Issued | 04/26/2006 |
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 Charles Parker, M. D.. Source: openpaymentsdata.cms.gov.
Total received
$225
Largest payer
Ardelyx, 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 · Generic-heavy
Charles Parker, M. D. - brand share 6.0%
Gastroenterology Physician average
6% brand-name claims vs 93% generic, on 2,410 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.
2,410
Total Claims
$100K
Total Drug Cost
206
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 4,124
- Total Day Supply
- 120,991
- Brand vs Generic
- 6% brand / 93% generic
- Brand Drug Cost
- $64K
- Generic Drug Cost
- $36K
- Opioid Claims
- 92 (3.8% rate)
- Antibiotic Claims
- 62
Patient Demographics
- Average Patient Age
- 72.7 years
- Avg HCC Risk Score
- 1.13
- Gender Split
- 51% female / 49% male
- Age Distribution
- <65: 32, 65-74: 80, 75-84: 66, 85+: 28
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Charles Parker, M. D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Alprazolam
Alprazolam
125 claims
- Amlodipine Besylate
Amlodipine Besylate
93 claims
- Omeprazole
Omeprazole
79 claims
- Hydrochlorothiazide
Hydrochlorothiazide
77 claims
- Metformin Hcl
Metformin Hcl
65 claims
- Gabapentin
Gabapentin
61 claims
- Tamsulosin Hcl
Tamsulosin Hcl
61 claims
- Atorvastatin Calcium
Atorvastatin Calcium
60 claims
| Drug | Claims |
|---|---|
| Alprazolam | 125 |
| Amlodipine Besylate | 93 |
| Omeprazole | 79 |
| Hydrochlorothiazide | 77 |
| Metformin Hcl | 65 |
| Gabapentin | 61 |
| Tamsulosin Hcl | 61 |
| Atorvastatin Calcium | 60 |
| Pantoprazole Sodium | 60 |
| Losartan Potassium | 57 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Gastroenterology Physician Overview
How Charles Parker, M. D. fits within the Gastroenterology Physician landscape nationally.
16,567
Gastroenterology Physician Providers in US
54
States with Gastroenterology Physician
833
Avg Claims per Provider
Charles Parker, M. D.'s 2,410 claims are above the specialty average of 833.
Nearby Gastroenterology Physician Providers in Virginia
Other clinicians with the same primary specialty enrolled in Virginia, drawn from the same CMS NPPES roster as Parker.
Dr. Mahmood Abedi
MD
Fairfax, VA
Dr. Mohammad Abidi
MD
Manassas, VA
Dr. Souheil Abou Assi
M.D.
Richmond, VA
Dr. Emad Abuhamda
MD
Alexandria, VA
Dr. Jason Adam
M.D.
North Chesterfield, VA
Compare Gastroenterology 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 Virginia medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Gastroenterology 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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How insurance networks affect your costs
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Frequently Asked Questions
What is Charles Parker, M. D.'s specialty? ▼
Charles Parker, M. D. specializes in Gastroenterology Physician and practices in South Boston, Virginia. Credentials: M. D..
How much does Charles Parker, M. D. prescribe under Medicare Part D? ▼
In 2023, Charles Parker, M. D. wrote 2,410 Medicare Part D claims totaling $100K in drug costs for 206 beneficiaries.
Where is Charles Parker, M. D. located? ▼
Charles Parker, M. D. is located at 1627 SEYMOUR DR, South Boston, VA, 24592. Phone: (434) 572-1171.
What is Charles Parker, M. D.'s NPI number? ▼
Charles Parker, M. D.'s National Provider Identifier (NPI) is 1912963091, issued on 04/26/2006.
Does Charles Parker, M. D. prescribe more brand-name or generic drugs? ▼
Charles Parker, M. D.'s prescribing is 6% brand-name and 93% generic drugs by claim count, with $64K in brand drug costs.
Does Charles Parker, M. D. prescribe opioids? ▼
Yes, Charles Parker, M. D. had 92 opioid claims in 2023 with an opioid prescribing rate of 3.8%.
How many Gastroenterology Physician providers are there in the US? ▼
There are 16,567 Gastroenterology Physician providers across 54 states in the US. The average Gastroenterology Physician provider writes 833 Medicare Part D claims per year.
What drugs does Charles Parker, M. D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Charles Parker, M. D.'s most frequently prescribed drugs include Alprazolam, Amlodipine Besylate, Omeprazole. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Charles Parker, M. D. accept Medicare? ▼
Charles Parker, M. D. appears in CMS Medicare data with 2,410 Part D claims and 206 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Charles Parker, M. D.'s credentials? ▼
Charles Parker, M. D.'s NPI is 1912963091 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.