Dr. David Alan Janssen, MD
- Medicare services, 2024
- 571
- Medicare patients, 2024
- 93
- Part D claims, 2024
- 659
- Hospital affiliations
- 3
- Medical groups
- 2
- Practice address
- 1101 W Liberty St, Farmington, MO 63640
- Practice phone
- Call (573) 756-6451
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
BJC Parkland Health Center
Farmington, Missouri
Find Dr. Janssen'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. David Alan Janssen is an infectious disease specialist in Farmington, Missouri
Dr. Janssen practices at BJC Parkland Health Center in Farmington, Missouri.
Dr. Janssen's NPI, 1700995339, was assigned on August 29, 2006. Dr. Janssen graduated from Indiana University School of Medicine in 1988. Dr. Janssen holds Missouri license 208810309.
- NPI
- 1700995339NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3173622339
- NPI enumeration date
- August 29, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (573) 756-6451
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 64
- Medical school graduation
- 1988
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. David Alan Janssen practices at BJC Parkland Health Center in Farmington, Missouri
Dr. Janssen's primary practice is BJC Parkland Health Center, at 1101 W Liberty St, Farmington, MO 63640 in Saint Francois County. The practice phone is (573) 756-6451.
- BJC Parkland Health Center1101 W Liberty St, Farmington, MO 63640 · Saint Francois CountyPhone(573) 756-6451
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. David Alan Janssen is affiliated with 5 sites of care and 2 medical groups
Dr. Janssen's primary practice is BJC Parkland Health Center in Farmington, Missouri. Dr. Janssen is also affiliated with Parkland Health Center. The medical group on file is Parkland Health Center. Dmand AI also links Dr. Janssen to 2 more hospitals, 1 group practice or clinic and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. David Alan Janssen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Janssen practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| BJC Parkland Health Center | Available with a free account |
| +4 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. David Alan Janssen is one of 179 infectious disease specialists in Missouri
Infectious disease is Dr. Janssen's primary specialty in the NPI Registry, under taxonomy code 207RI0200X. Dmand AI has Dr. Janssen's licenses on file in 2 states: Missouri and Illinois.
Specialties and state licenses
- Infectious disease, MissouriPrimary
- Illinois license
Infectious disease specialists near Dr. Janssen
Counts of infectious disease specialists 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. David Alan Janssen billed Medicare for 571 services in 2024
CMS data shows 571 Medicare services from Dr. Janssen across 5 procedure codes in 2024, for 93 Medicare patients. Medicare paid $40,119 for them.
Where Dr. Janssen's Medicare services took place, 2024
- In an office529%
- In a facility51991%
Dr. Janssen compared with the Missouri median for infectious disease specialists, 2024
- Dr. Janssen
- Missouri median
- Medicare services
- 571vs 2762.1 times
- Medicare patients
- 93vs 12727% below
- Part D claims
- 539vs 2032.7 times
Medians across 176 infectious disease specialists in Missouri with Dmand AI profiles that report each measure.
Dr. Janssen'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. Janssen and other infectious disease specialists in Missouri.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. David Alan Janssen treated 93 Medicare patients in 2024, average age 72
CMS counts 93 Medicare patients who saw Dr. Janssen in 2024. The largest group is 65 to 74, with 34 patients. 75% of them have chronic kidney disease, and 75% have high blood pressure. 20% are also on Medicaid. Their average risk score is 3.56, 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. Janssen's median patient age at 63, with 41% women.
Dr. Janssen's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Janssen's Medicare patients by sex, 2024
- Women5559%
- Men3841%
Chronic conditions among Dr. Janssen's Medicare patients, 2024
- Chronic kidney disease75%
- High blood pressure75%
- High cholesterol75%
- Arthritis73%
- Mood disorders62%
- Ischemic heart disease56%
- Depression55%
- Diabetes49%
Share of Medicare patients with each condition. A patient can have several.
Dr. Janssen's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 63
Patient panel by sex, all payers
- Women41%
- Men57%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. David Alan Janssen wrote 659 Medicare Part D claims in 2024
In 2024, Dr. Janssen wrote 659 Medicare Part D claims for 93 patients. 91% of them were for generic drugs. CMS names the drug for 539 of them, across 18 drugs with 11 or more claims each, at $74,587 in total drug cost.
Dr. Janssen's Part D claims by kind of drug, 2024
- Generic602 claims91%
- Brand-name57 claims9%
Dr. Janssen'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. Janssen's Part D claims, 2024
- Antibiotics80%527 of 659 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
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. David Alan Janssen takes part in Medicare
Dr. Janssen accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. David Alan Janssen graduated from Indiana University School of Medicine
Dr. Janssen graduated from Indiana University School of Medicine in 1988.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. David Alan Janssen'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 DataDmand AI Org Hierarchy 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) |
| 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. David Alan Janssen
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. David Alan Janssen's NPI number?
Dr. David Alan Janssen's NPI number is 1700995339. It was assigned on August 29, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. David Alan Janssen?
Dr. David Alan Janssen is an infectious disease specialist in Farmington, Missouri. The primary specialty in the NPI Registry is Infectious Disease Physician (taxonomy code 207RI0200X).
Where does Dr. David Alan Janssen practice?
Dr. Janssen practices at 1101 W Liberty St, Farmington, MO 63640. Dr. Janssen's primary practice is BJC Parkland Health Center in Farmington, Missouri. Dmand AI also links Dr. Janssen to 2 hospitals, 1 group practice or clinic and 1 medical group.
What is Dr. David Alan Janssen's office phone number?
The practice phone on file for Dr. Janssen is (573) 756-6451.
What is Dr. David Alan Janssen's medical license number?
Dr. Janssen holds Missouri license 208810309, one of the licenses on file in 2 states.
Which states has Dr. David Alan Janssen been licensed in?
Dmand AI has state licenses on file for Dr. Janssen in Missouri and Illinois.
Which hospitals is Dr. David Alan Janssen affiliated with?
Dr. Janssen is affiliated with Parkland Health Center. Dmand AI links Dr. Janssen to 2 more hospitals.
What medical group is Dr. David Alan Janssen part of?
Dr. Janssen is linked to Parkland Health Center. Dmand AI links Dr. Janssen to 1 more medical group.
Does Dr. David Alan Janssen accept Medicare?
Yes. CMS data shows Dr. Janssen billed Medicare for 571 services in 2024, and Dr. Janssen accepts Medicare assignment.
How many Medicare patients does Dr. David Alan Janssen see?
CMS counts 93 Medicare patients who saw Dr. Janssen in 2024, with an average age of 72.
Show 4 more questionsShow fewer questions
What services does Dr. David Alan Janssen bill to Medicare?
In 2024, Dr. Janssen's most billed Medicare services were hospital inpatient care (99232), hospital inpatient care (99223) and office visit, established patient (99214).
Where did Dr. David Alan Janssen go to medical school?
Dr. Janssen graduated from Indiana University School of Medicine in 1988.
What drugs does Dr. David Alan Janssen prescribe most?
In 2024 Medicare Part D data, Dr. Janssen's most prescribed drugs by claims were Cefuroxime, Ceftriaxone and Amoxicillin-Clavulanate Potass.
How long has Dr. David Alan Janssen been practicing?
Dr. Janssen graduated from medical school in 1988, 38 years ago.
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