Dr. John P. Caster, MD
- Medicare services, 2024
- 4,863
- Medicare patients, 2024
- 344
- Part D claims, 2024
- 11,337
- MIPS score, 2024
- 82
- Hospital affiliations
- 2
- Practice address
- 1001 E Primrose St, Springfield, MO 65807
- Practice phone
- Call (417) 875-3332
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Ferrell - Duncan Clinic
Springfield, Missouri
Find Dr. Caster's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. John P. Caster is an internist in Springfield, Missouri
Dr. Caster practices at Ferrell - Duncan Clinic in Springfield, Missouri.
Dr. Caster's NPI, 1902849854, was assigned on June 14, 2006. Dr. Caster graduated from Saint Louis University School of Medicine in 1995. Dr. Caster holds Missouri license 108915.
- NPI
- 1902849854NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8820028632
- NPI enumeration date
- June 14, 2006
- NPI status
- Active
- Practice phone
- (417) 875-3332
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 57
- Medical school graduation
- 1995
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. John P. Caster practices at Ferrell - Duncan Clinic in Springfield, Missouri
Dr. Caster's primary practice is Ferrell - Duncan Clinic, at 1001 E Primrose St, Springfield, MO 65807 in Greene County. The practice phone is (417) 875-3332.
- Ferrell - Duncan Clinic1001 E Primrose St, Springfield, MO 65807 · Greene CountyPhone(417) 875-3332
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. John P. Caster is affiliated with 5 sites of care and 1 medical group
Dr. Caster's primary practice is Ferrell - Duncan Clinic in Springfield, Missouri. Dr. Caster is also affiliated with Cox Medical Center South. The medical group on file is Ferrell-Duncan Clinic. Dmand AI also links Dr. Caster to 1 more hospital, 1 group practice or clinic and 1 home health agency, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. John P. Caster's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Caster practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Ferrell - Duncan Clinic | Available with a free account |
| +4 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John P. Caster is one of 2,114 internists in Missouri
Internal medicine is Dr. Caster's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Caster is licensed in Missouri.
Specialties and state licenses
- Internal medicine, MissouriPrimary
Internists near Dr. Caster
Counts of internists 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. John P. Caster billed Medicare for 4,863 services in 2024
CMS data shows 4,863 Medicare services from Dr. Caster across 32 procedure codes in 2024, for 344 Medicare patients. Medicare paid $137,093 for them. Every service was in an office.
Dr. Caster's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Lab and pathology
- 2023: 2,7902024: 2,8803%
- Office and hospital visits
- 2023: 7892024: 7525%
- Surgery
- 2023: 5532024: 5683%
- Other services
- 2023: 4612024: 52815%
- Tests and treatments
- 2023: 1212024: 9720%
- Imaging
- 2023: 2952024: 3887%
Dr. Caster compared with the Missouri median for internists, 2024
- Dr. Caster
- Missouri median
- Medicare services
- 4,863vs 5309.2 times
- Medicare patients
- 344vs 21163% above
- Part D claims
- 10,741vs 32533.0 times
Medians across 2,076 internists in Missouri with Dmand AI profiles that report each measure.
Dr. Caster'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.
Need commercial claims for Dr. Caster?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Caster and other internists in Missouri.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John P. Caster treated 344 Medicare patients in 2024, average age 75
CMS counts 344 Medicare patients who saw Dr. Caster in 2024. The largest group is 65 to 74, with 153 patients. 75% of them have high blood pressure, and 75% have high cholesterol. Their average risk score is 0.96, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Caster's median patient age at 74, with 52% women.
Dr. Caster's Medicare patients by age, 2024
Dr. Caster's Medicare patients by sex, 2024
- Women17049%
- Men17451%
Chronic conditions among Dr. Caster's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis43%
- Diabetes24%
- Cancer22%
- Atrial fibrillation20%
- Ischemic heart disease19%
- Osteoporosis17%
Share of Medicare patients with each condition. A patient can have several.
Dr. Caster's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 74
Patient panel by sex, all payers
- Women52%
- Men48%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John P. Caster wrote 11,337 Medicare Part D claims in 2024
In 2024, Dr. Caster wrote 11,337 Medicare Part D claims for 654 patients. 86% of them were for generic drugs. CMS names the drug for 10,741 of them, across 156 drugs with 11 or more claims each, at $798,523 in total drug cost. In 2023, CMS named 10,364 claims across 152 drugs.
Dr. Caster's Part D claims by kind of drug, 2024
- Generic9,796 claims86%
- Brand-name1,456 claims13%
- Other85 claims1%
Dr. Caster'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. Caster's Part D claims, 2024
- Opioids2%282 of 11,337 claims
- Antibiotics1%146 of 11,337 claims
- Antipsychotics, patients 65 and over0%16 of 11,337 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: 10,3642024: 10,7414%
Drugs named by CMS: 156 in 2024, 152 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
Dr. John P. Caster scored 82 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 82 out of 100 for Dr. Caster for performance year 2024, reported as part of a group.
Dr. Caster's MIPS scores, performance year 2024
- 82of 100Final score
- 64.7of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 76of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Removal of skin lesions: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)
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Dr. John P. Caster received $19,605 in industry payments from 2016 to 2025
CMS Open Payments shows 1,388 general payments to Dr. Caster from 35 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. AstraZeneca Pharmaceuticals LP paid the most, $2,830.
General payments to Dr. Caster by program year, 2016 to 2025
General payments to Dr. Caster by kind, 2016 to 2025
- Food and beverage$19,561100%
- Education$430%
Companies that paid Dr. Caster the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John P. Caster graduated from Saint Louis University School of Medicine
Dr. Caster graduated from Saint Louis University School of Medicine in 1995.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. John P. Caster'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand 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 | Clinician Public Reporting: Overall MIPS Performance (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. John P. Caster
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. John P. Caster's NPI number?
Dr. John P. Caster's NPI number is 1902849854. It was assigned on June 14, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John P. Caster?
Dr. John P. Caster is an internist in Springfield, Missouri. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. John P. Caster practice?
Dr. Caster practices at 1001 E Primrose St, Springfield, MO 65807. Dr. Caster's primary practice is Ferrell - Duncan Clinic in Springfield, Missouri. Dmand AI also links Dr. Caster to 1 hospital, 1 group practice or clinic and 1 home health agency.
What is Dr. John P. Caster's office phone number?
The practice phone on file for Dr. Caster is (417) 875-3332.
What is Dr. John P. Caster's medical license number?
Dr. Caster holds Missouri license 108915.
Which hospitals is Dr. John P. Caster affiliated with?
Dr. Caster is affiliated with Cox Medical Center South. Dmand AI links Dr. Caster to 1 more hospital.
What medical group is Dr. John P. Caster part of?
Dr. Caster is linked to Ferrell-Duncan Clinic.
Does Dr. John P. Caster accept Medicare?
Yes. CMS data shows Dr. Caster billed Medicare for 4,863 services in 2024.
What is Dr. John P. Caster's MIPS score?
Dr. Caster's MIPS final score for performance year 2024 is 82 out of 100, reported as part of a group.
How many Medicare patients does Dr. John P. Caster see?
CMS counts 344 Medicare patients who saw Dr. Caster in 2024, with an average age of 75.
Show 5 more questionsShow fewer questions
What services does Dr. John P. Caster bill to Medicare?
In 2024, Dr. Caster's most billed Medicare services were office visit, established patient (99214), surgery: heart and blood vessels (36415) and lab and pathology test (80053).
Where did Dr. John P. Caster go to medical school?
Dr. Caster graduated from Saint Louis University School of Medicine in 1995.
What drugs does Dr. John P. Caster prescribe most?
In 2024 Medicare Part D data, Dr. Caster's most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Levothyroxine Sodium.
Has Dr. John P. Caster received payments from drug or device companies?
CMS Open Payments shows $19,605 in general payments to Dr. Caster from 35 companies from 2016 to 2025. The largest total came from AstraZeneca Pharmaceuticals LP.
How long has Dr. John P. Caster been practicing?
Dr. Caster graduated from medical school in 1995, 31 years ago.
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