NPI registry status
Active
2026 NPPES data Emergency Medicine Physician NPI 1922073055 M.D.
Verify on CMS → Randell Chapman, M.D.
Emergency Medicine Physician in Shawnee, Oklahoma.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 64,463 in Emergency Medicine 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
209
Medicare Part D claims · 151 beneficiaries · Emergency Medicine Physician avg: 352
What the federal data shows
Randell Chapman, M.D. filed 209 Medicare Part D claims in 2023 as an Emergency Medicine Physician in Shawnee, Oklahoma.
- 209
- Part D claims, 2023
- Likely
- board-certified (heuristic)
- ≥49th
- 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 Randell Chapman, 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 1922073055), first enumerated 02/22/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 209 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
2 CMS Care Compare hospital affiliations 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 1922073055 · Emergency Medicine Physician
NPI-10 · ENUM-LEGACY · TAX-MEGA · RX-LIGHT · BOOK-LIGHT · PHOTO-ENUM
- NPI-10 1922073055
- ENUM-LEGACY 2006
- TAX-MEGA 64K Emergency Medicine
- RX-LIGHT 209
- BOOK-LIGHT 685 in Oklahoma
- PHOTO-ENUM Seth Schonwald · 2006
Randell Chapman, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
209 ≥ 49th percentile 49% of 1,370,886 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 · 2023
✓
Board certification likely (heuristic, not verified)
Randell Chapman, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 2 hospital affiliations - 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 Randell Chapman, M.D.?
Quality data not reportedPrimary specialty
Emergency Medicine Physician
Medicare Part D claims
209 41% vs specialty avg
Specialty distribution in Oklahoma
How Emergency Medicine Physician compares to other specialties among Oklahoma 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 Emergency Medicine 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 | 1922073055 |
|---|---|
| Specialty | Emergency Medicine Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 02/22/2006 |
Hospital and facility affiliations
Facilities where Randell Chapman, 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.
Ehp OF Ponca City LLC
Ponca City, OK
Hospitalist Medicine Physicians OF Oklahoma Tcs LLC
Lawton, OK
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
209
Total Claims
$4K
Total Drug Cost
151
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 211
- Total Day Supply
- 2,141
- Generic Drug Cost
- $2K
- Opioid Claims
- 39 (18.7% rate)
- Antibiotic Claims
- 88
Patient Demographics
- Average Patient Age
- 68.1 years
- Avg HCC Risk Score
- 1.46
- Gender Split
- 68% female / 32% male
- Age Distribution
- <65: 45, 65-74: 55, 75-84: 31, 85+: 20
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Randell Chapman, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Hydrocodone-Acetam…
Hydrocodone-Acetaminophen
35 claims
- Cefdinir
Cefdinir
32 claims
- Doxycycline Hyclate
Doxycycline Hyclate
21 claims
- Clindamycin Hcl
Clindamycin Hcl
14 claims
- Albuterol Sulfate … 11
Albuterol Sulfate Hfa
11 claims
- Dexamethasone 11
Dexamethasone
11 claims
| Drug | Claims |
|---|---|
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 35 |
| Cefdinir | 32 |
| Doxycycline Hyclate | 21 |
| Clindamycin Hcl | 14 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 11 |
| Dexamethasone | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Emergency Medicine Physician Overview
How Randell Chapman, M.D. fits within the Emergency Medicine Physician landscape nationally.
64,463
Emergency Medicine Physician Providers in US
56
States with Emergency Medicine Physician
352
Avg Claims per Provider
Randell Chapman, M.D.'s 209 claims are below the specialty average of 352.
Nationwide Emergency Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Chapman, both outside Oklahoma 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 Emergency Medicine Physician Providers in Oklahoma
Other clinicians with the same primary specialty enrolled in Oklahoma, drawn from the same CMS NPPES roster as Chapman.
One of 685 Emergency Medicine Physician providers enrolled in Oklahoma, 5 are shown here.
Dr. David Abercrombie
MD
Oklahoma City, OK
Dr. Bobby Abernathy
D.O.
Tulsa, OK
Dr. Tyler Adams
D.O.
Lawton, OK
Dr. Tolulope Adepoju
MD
Norman, OK
Tinuola Agbabiaka
Oklahoma City, OK
Compare Emergency Medicine Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Randell Chapman, M.D.'s specialty? ▼
Randell Chapman, M.D. specializes in Emergency Medicine Physician and practices in Shawnee, Oklahoma. Credentials: M.D..
How much does Randell Chapman, M.D. prescribe under Medicare Part D? ▼
In 2023, Randell Chapman, M.D. wrote 209 Medicare Part D claims totaling $4K in drug costs for 151 beneficiaries.
Where is Randell Chapman, M.D. located? ▼
Randell Chapman, M.D. is located at 1102 W MACARTHUR ST, Shawnee, OK, 74804. Phone: (405) 878-8102.
What is Randell Chapman, M.D.'s NPI number? ▼
Randell Chapman, M.D.'s National Provider Identifier (NPI) is 1922073055, issued on 02/22/2006.
Does Randell Chapman, M.D. prescribe opioids? ▼
Yes, Randell Chapman, M.D. had 39 opioid claims in 2023 with an opioid prescribing rate of 18.7%.
How many Emergency Medicine Physician providers are there in the US? ▼
There are 64,463 Emergency Medicine Physician providers across 56 states in the US. The average Emergency Medicine Physician provider writes 352 Medicare Part D claims per year.
What drugs does Randell Chapman, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Randell Chapman, M.D.'s most frequently prescribed drugs include Hydrocodone-Acetaminophen, Cefdinir, Doxycycline Hyclate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Randell Chapman, M.D. accept Medicare? ▼
Randell Chapman, M.D. appears in CMS Medicare data with 209 Part D claims and 151 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Randell Chapman, M.D.'s credentials? ▼
Randell Chapman, M.D.'s NPI is 1922073055 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
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 May 2026.