Gastroenterol Hepatol
Drug Therapy, CombinationLiver Abscess, AmebicStreptococcal Infections
Dr. Gerald Nathan Karpman, MD
NPI1619905437
- Medicare services, 2020
- 486
- Part D claims, 2020
- 16
- Publications
- 4
- Industry payments
- $53
- Affiliated sites
- 1
- Practice address
- 16 Hawk Ridge Dr, Lake Saint Louis, MO 63367
- Practice phone
- Call (636) 561-5686
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Medical Transportation Management, Inc.
Lake Saint Louis, Missouri
Find Dr. Karpman'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. Gerald Nathan Karpman is a dermatologist in Lake Saint Louis, Missouri
Dr. Karpman practices at Medical Transportation Management, Inc. in Lake Saint Louis, Missouri.
Dr. Karpman's NPI, 1619905437, was assigned on June 29, 2006. Dr. Karpman graduated from Saint Louis University School Of Medicine in 1974. Dr. Karpman holds California license G29766.
NPI and contact details
- NPI
- 1619905437NPI Registry (opens in a new tab)
- NPI enumeration date
- June 29, 2006
- NPI status
- Active
- Practice phone
- (636) 561-5686
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Medical school graduation
- 1974
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Gerald Nathan Karpman practices at Medical Transportation Management, Inc. in Lake Saint Louis, Missouri
Dr. Karpman's primary practice is Medical Transportation Management, Inc., at 16 Hawk Ridge Dr, Lake Saint Louis, MO 63367 in Saint Charles County. The practice phone is (636) 561-5686.
- Medical Transportation Management, Inc.16 Hawk Ridge Dr, Lake Saint Louis, MO 63367 · Saint Charles CountyPhone(636) 561-5686
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Gerald Nathan Karpman is affiliated with 2 sites of care and 1 medical group
Dr. Karpman's primary practice is Medical Transportation Management, Inc. in Lake Saint Louis, Missouri. The medical group on file is Schweiger Dermatology Group, San Pedro. Dmand AI also links Dr. Karpman to 1 more group practice or clinic, named with a free account.
Medical Transportation Management, Inc.Primary
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Gerald Nathan Karpman's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Karpman practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Medical Transportation Management, Inc. | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gerald Nathan Karpman is one of 234 dermatologists in Missouri
Dermatology is Dr. Karpman's primary specialty in the NPI Registry, under taxonomy code 207N00000X. Dr. Karpman is board certified in dermatology by the American Board of Dermatology. Dmand AI has Dr. Karpman's licenses on file in 2 states: California and Hawaii.
Specialties and state licenses
- Dermatology, CaliforniaPrimary
- Hawaii license
Dermatologists near Dr. Karpman
Counts of dermatologists with a Dmand AI profile, by place and practice. Each opens the list.
234dermatologists in Missouri
2dermatologists in Lake Saint Louis
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Gerald Nathan Karpman billed Medicare for 486 services in 2020
CMS data shows 486 Medicare services from Dr. Karpman across 4 procedure codes in 2020. Medicare paid $6,438 for them. Every service was in an office.
Medicare services, 2020486
Paid by Medicare$6,438
Procedure codes4
Dr. Karpman's Medicare services by type, 2019 to 2020
- 2019
- 2020
- Surgery
- 2019: 2,4072020: 44182%
- Office and hospital visits
- 2019: 2192020: 4579%
Dr. Karpman compared with the Missouri median for dermatologists, 2020
- Dr. Karpman
- Missouri median
- Medicare services
- 486vs 2,18578% below
- Part D claims
- 16vs 55097% below
Medians across 223 dermatologists in Missouri with Dmand AI profiles that report each measure.
Dr. Karpman's most billed Medicare procedure codes, 2020
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. Karpman and other dermatologists in Missouri.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gerald Nathan Karpman's patients have a median age of 78
Across all payers, Dmand AI patient panel data puts Dr. Karpman's median patient age at 78, with 52% women.
Dr. Karpman's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 78
Patient panel by sex, all payers
- Women52%
- Men46%
Source: Dmand AI Patient Panel Data
Dr. Gerald Nathan Karpman wrote 16 Medicare Part D claims in 2020
In 2020, Dr. Karpman wrote 16 Medicare Part D claims. Every claim was for a generic drug. They cover 1 drug, with $62 in total drug cost. In 2019, CMS named 69 claims across 4 drugs.
Part D claims, 202016
Drugs named by CMS1
Total drug cost$62
Dr. Karpman's most prescribed drugs by claims, 2020
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2019 to 2020
- 2019
- 2020
- Claims for drugs CMS names
- 2019: 692020: 1677%
Drugs named by CMS: 1 in 2020, 4 in 2019.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Gerald Nathan Karpman has 4 publications on record
Dmand AI links 4 papers to Dr. Karpman. The most frequent topics are Drug Therapy, Combination. Dr. Karpman has published most often in Gastroenterol Hepatol.
Papers4
Topics Dr. Karpman writes about most
- Drug Therapy, Combination
Recent publications by Dr. Karpman
Rev Esp Enferm Dig
Bile Duct DiseasesCholangiopancreatography, Endoscopic Retrograde
Adenocarcinoma, MucinousAppendiceal NeoplasmsAppendix
Gastroenterol Hepatol
Antitubercular AgentsDrug Therapy, CombinationGlucocorticoids
See who Dr. Karpman researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Karpman works with, so you can find a warm path to the right dermatologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Gerald Nathan Karpman received $53 in industry payments from 2016 to 2020
CMS Open Payments shows 3 general payments to Dr. Karpman from 3 drug and device companies from 2016 to 2020. Food and beverage make up the largest share, 100% of the total. Sun Pharmaceutical Industries Inc. paid the most, $22.
General payments to Dr. Karpman by program year, 2016 to 2020
Companies that paid Dr. Karpman the most, 2016 to 2020
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Gerald Nathan Karpman has 3 awards and honors on record
Dmand AI lists 3 awards for Dr. Karpman, most recently CMS Stage 1 EHR in 2013.
Awards and honors for Dr. Karpman
- 2013
- CMS Stage 1 EHR
- Undated
- AAD Fellow
- ASDS Fellow
Source: Dmand AI Professional Profile Data
Dr. Gerald Nathan Karpman graduated from Saint Louis University School Of Medicine
Dr. Karpman graduated from Saint Louis University School Of Medicine in 1974. Dr. Karpman is a member of AAD and ASDS.
- Medical school
- Board certified in dermatology
Source: Dmand AI Professional Profile Data
Sources for Dr. Gerald Nathan Karpman'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 Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| 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. Gerald Nathan Karpman
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. Gerald Nathan Karpman's NPI number?
Dr. Gerald Nathan Karpman's NPI number is 1619905437. It was assigned on June 29, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Gerald Nathan Karpman?
Dr. Gerald Nathan Karpman is a dermatologist in Lake Saint Louis, Missouri. The primary specialty in the NPI Registry is Dermatology Physician (taxonomy code 207N00000X).
Where does Dr. Gerald Nathan Karpman practice?
Dr. Karpman practices at 16 Hawk Ridge Dr, Lake Saint Louis, MO 63367. Dr. Karpman's primary practice is Medical Transportation Management, Inc. in Lake Saint Louis, Missouri. Dmand AI also links Dr. Karpman to 1 group practice or clinic.
What is Dr. Gerald Nathan Karpman's office phone number?
The practice phone on file for Dr. Karpman is (636) 561-5686.
What is Dr. Gerald Nathan Karpman's medical license number?
Dr. Karpman holds California license G29766, one of the licenses on file in 2 states.
Which states has Dr. Gerald Nathan Karpman been licensed in?
Dmand AI has state licenses on file for Dr. Karpman in California (1975 to 2027) and Hawaii (1993 to 2014).
What medical group is Dr. Gerald Nathan Karpman part of?
Dr. Karpman is linked to Schweiger Dermatology Group, San Pedro.
Does Dr. Gerald Nathan Karpman accept Medicare?
Yes. CMS data shows Dr. Karpman billed Medicare for 486 services in 2020.
Is Dr. Gerald Nathan Karpman board certified?
Yes. Dr. Karpman is board certified in dermatology by the American Board of Dermatology.
What services does Dr. Gerald Nathan Karpman bill to Medicare?
In 2020, Dr. Karpman's most billed Medicare services were surgery: skin and soft tissue (17003), surgery: skin and soft tissue (17000) and office visit, established patient (99213).
Show 5 more questionsShow fewer questions
Where did Dr. Gerald Nathan Karpman go to medical school?
Dr. Karpman graduated from Saint Louis University School Of Medicine in 1974.
What drugs does Dr. Gerald Nathan Karpman prescribe most?
In 2020 Medicare Part D data, Dr. Karpman's most prescribed drugs by claims were Triamcinolone Acetonide.
Has Dr. Gerald Nathan Karpman received payments from drug or device companies?
CMS Open Payments shows $53 in general payments to Dr. Karpman from 3 companies from 2016 to 2020. The largest total came from Sun Pharmaceutical Industries Inc.
How long has Dr. Gerald Nathan Karpman been practicing?
Dr. Karpman graduated from medical school in 1974, 52 years ago.
Does Dr. Gerald Nathan Karpman do research?
Dmand AI links 4 publications to Dr. Karpman.
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