Dr. Randell B. Chapman, MD
- Medicare services, 2024
- 690
- Medicare patients, 2024
- 504
- Part D claims, 2024
- 383
- Hospital affiliations
- 4
- Industry payments
- $20
- Practice address
- 5602 SW Lee Blvd, Lawton, OK 73505
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Southwestern Medical Center - HOPD
Acute Care Hospital outpatient department · Lawton, Oklahoma
Find Dr. Chapman's professional email, personal email and mobile number
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Dr. Randell B. Chapman is an emergency medicine physician in Lawton, Oklahoma
Dr. Chapman practices at Southwestern Medical Center - HOPD in Lawton, Oklahoma.
Dr. Chapman's NPI, 1922073055, was assigned on February 22, 2006. Dr. Chapman graduated from University of Oklahoma College of Medicine in 1983. Dr. Chapman holds Oklahoma license 14857.
- NPI
- 1922073055NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3779559018
- NPI enumeration date
- February 22, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 69
- Medical school graduation
- 1983
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Randell B. Chapman practices at Southwestern Medical Center - HOPD in Lawton, Oklahoma
Dr. Chapman's primary practice is Southwestern Medical Center - HOPD, at 5602 SW Lee Blvd, Lawton, OK 73505.
- Southwestern Medical Center - HOPD5602 SW Lee Blvd, Lawton, OK 73505
Source: Dmand AI Affiliation Data
Dr. Randell B. Chapman is affiliated with 5 sites of care and 4 medical groups
Dr. Chapman's primary practice is Southwestern Medical Center - HOPD in Lawton, Oklahoma. Dr. Chapman is also affiliated with Memorial Health Southwest. The medical group on file is Emergency Services of Oklahoma PC. Dmand AI also links Dr. Chapman to 3 more hospitals and 3 medical groups, each named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Randell B. Chapman's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chapman practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Southwestern Medical Center - HOPD | Available with a free account |
| +4 more sites and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Randell B. Chapman is one of 695 emergency medicine physicians in Oklahoma
Emergency medicine is Dr. Chapman's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dmand AI has Dr. Chapman's licenses on file in 2 states: Oklahoma and Kansas.
Specialties and state licenses
- Emergency medicine, OklahomaPrimary
- Kansas license
Emergency medicine physicians near Dr. Chapman
Counts of emergency medicine physicians with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Randell B. Chapman billed Medicare for 690 services in 2024
CMS data shows 690 Medicare services from Dr. Chapman across 5 procedure codes in 2024, for 504 Medicare patients. Medicare paid $64,560 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Chapman's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 5512024: 5541%
- Tests and treatments
- 2023: 1392024: 1362%
Dr. Chapman compared with the Oklahoma median for emergency medicine physicians, 2024
- Dr. Chapman
- Oklahoma median
- Medicare services
- 690vs 3242.1 times
- Medicare patients
- 504vs 29471% above
- Part D claims
- 237vs 882.7 times
Medians across 669 emergency medicine physicians in Oklahoma with Dmand AI profiles that report each measure.
Dr. Chapman's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Chapman and other emergency medicine physicians in Oklahoma.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Randell B. Chapman treated 504 Medicare patients in 2024, average age 73
CMS counts 504 Medicare patients who saw Dr. Chapman in 2024. The largest group is 65 to 74, with 188 patients. 75% of them have high blood pressure, and 72% have high cholesterol. 21% are also on Medicaid. Their average risk score is 1.67, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Chapman's median patient age at 48, with 57% women.
Dr. Chapman's Medicare patients by age, 2024
Dr. Chapman's Medicare patients by sex, 2024
- Women27855%
- Men22645%
Chronic conditions among Dr. Chapman's Medicare patients, 2024
- High blood pressure75%
- High cholesterol72%
- Arthritis53%
- Diabetes41%
- Mood disorders38%
- Anxiety37%
- Ischemic heart disease37%
- Depression36%
Share of Medicare patients with each condition. A patient can have several.
Dr. Chapman's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 48
Patient panel by sex, all payers
- Women57%
- Men42%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Randell B. Chapman wrote 383 Medicare Part D claims in 2024
In 2024, Dr. Chapman wrote 383 Medicare Part D claims for 266 patients. 93% of them were for generic drugs. CMS names the drug for 237 of them, across 7 drugs with 11 or more claims each, at $2,446 in total drug cost. In 2023, CMS named 124 claims across 6 drugs.
Dr. Chapman's Part D claims by kind of drug, 2024
- Generic358 claims93%
- Brand-name and other25 claims7%
Dr. Chapman's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Chapman's Part D claims, 2024
- Opioids22%83 of 383 claims
- Antibiotics37%142 of 383 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1242024: 23791%
Drugs named by CMS: 7 in 2024, 6 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Randell B. Chapman takes part in Medicare
Dr. Chapman accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Removal of nail tissue: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Randell B. Chapman received $20 in industry payments in 2017
CMS Open Payments shows 1 general payment to Dr. Chapman from 1 drug or device company in 2017. Food and beverage make up the largest share, 100% of the total. Allergan Inc. paid the most, $20.
Companies that paid Dr. Chapman the most, 2017 to 2017
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Randell B. Chapman graduated from University of Oklahoma College of Medicine
Dr. Chapman graduated from University of Oklahoma College of Medicine in 1983.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Randell B. Chapman's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Randell B. Chapman
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Randell B. Chapman's NPI number?
Dr. Randell B. Chapman's NPI number is 1922073055. It was assigned on February 22, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Randell B. Chapman?
Dr. Randell B. Chapman is an emergency medicine physician in Lawton, Oklahoma. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Randell B. Chapman practice?
Dr. Chapman practices at 5602 SW Lee Blvd, Lawton, OK 73505. Dr. Chapman's primary practice is Southwestern Medical Center - HOPD in Lawton, Oklahoma. Dmand AI also links Dr. Chapman to 3 hospitals and 3 medical groups.
What is Dr. Randell B. Chapman's medical license number?
Dr. Chapman holds Oklahoma license 14857, one of the licenses on file in 2 states.
Which states has Dr. Randell B. Chapman been licensed in?
Dmand AI has state licenses on file for Dr. Chapman in Oklahoma and Kansas.
Which hospitals is Dr. Randell B. Chapman affiliated with?
Dr. Chapman is affiliated with Memorial Health Southwest. Dmand AI links Dr. Chapman to 3 more hospitals.
What medical group is Dr. Randell B. Chapman part of?
Dr. Chapman is linked to Emergency Services of Oklahoma PC. Dmand AI links Dr. Chapman to 3 more medical groups.
Does Dr. Randell B. Chapman accept Medicare?
Yes. CMS data shows Dr. Chapman billed Medicare for 690 services in 2024, and Dr. Chapman accepts Medicare assignment.
How many Medicare patients does Dr. Randell B. Chapman see?
CMS counts 504 Medicare patients who saw Dr. Chapman in 2024, with an average age of 73.
What services does Dr. Randell B. Chapman bill to Medicare?
In 2024, Dr. Chapman's most billed Medicare services were emergency department visit (99285), emergency department visit (99284) and heart test or procedure (93010).
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Where did Dr. Randell B. Chapman go to medical school?
Dr. Chapman graduated from University of Oklahoma College of Medicine in 1983.
What drugs does Dr. Randell B. Chapman prescribe most?
In 2024 Medicare Part D data, Dr. Chapman's most prescribed drugs by claims were Hydrocodone-Acetaminophen, Cefdinir and Doxycycline Hyclate.
Has Dr. Randell B. Chapman received payments from drug or device companies?
CMS Open Payments shows $20 in general payments to Dr. Chapman from 1 company from 2017 to 2017. The largest total came from Allergan Inc.
How long has Dr. Randell B. Chapman been practicing?
Dr. Chapman graduated from medical school in 1983, 43 years ago.
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