Dr. John Lambert Flach, DO
- Part D claims, 2024
- 183
- Hospital affiliations
- 1
- Industry payments
- $221
- Medical group
- 1
- State license
- 1
- Practice address
- 800 W Central Road, Arlington Heights, IL 60005
- Practice phone
- Call (847) 618-1000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Flach'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 Lambert Flach is a neurologist in Arlington Heights, Illinois
Dr. Flach practices at Northwest Community Hospital in Arlington Heights, Illinois, part of Endeavor Health.
Dr. Flach's NPI, 1386223089, was assigned on April 8, 2021. Dr. Flach graduated from Lincoln Mem Univ, Debusk Col of Osteopathic Med in 2021. Dr. Flach holds Illinois license 036173195.
- NPI
- 1386223089NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5395146559
- NPI enumeration date
- April 8, 2021
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (847) 618-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 31
- Medical school graduation
- 2021
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John Lambert Flach practices at Northwest Community Hospital in Arlington Heights, Illinois
Dr. Flach's primary practice is Northwest Community Hospital, at 800 W Central Road, Arlington Heights, IL 60005 in Cook County. The practice phone is (847) 618-1000.
- Northwest Community Hospital800 W Central Road, Arlington Heights, IL 60005 · Cook CountyPhone(847) 618-1000
Source: Dmand AI Affiliation Data
Dr. John Lambert Flach is affiliated with 3 sites of care and 1 medical group
Dr. Flach's primary practice is Northwest Community Hospital in Arlington Heights, Illinois, part of Endeavor Health. The medical group on file is Endeavor Health Medical Group. Dmand AI also links Dr. Flach to 1 more group practice or clinic and 1 hospital outpatient department, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. John Lambert Flach's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Flach practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Northwest Community Hospital | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dmand AI maps EHR vendors, IT decision makers and buying committees across Endeavor Health and 6.2K+ hospitals, with verified contacts in the same login.
Dr. John Lambert Flach is one of 822 neurologists in Illinois
Neurology is Dr. Flach's primary specialty in the NPI Registry, under taxonomy code 2084N0400X. Dr. Flach is licensed in Illinois.
Specialties and state licenses
- Neurology, IllinoisPrimary
Neurologists near Dr. Flach
Counts of neurologists 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 Lambert Flach's patients have a median age of 60
Across all payers, Dmand AI patient panel data puts Dr. Flach's median patient age at 60, with 63% women.
Dr. Flach's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 60
Patient panel by sex, all payers
- Women63%
- Men36%
Source: Dmand AI Patient Panel Data
Dr. John Lambert Flach wrote 183 Medicare Part D claims in 2024
In 2024, Dr. Flach wrote 183 Medicare Part D claims for 30 patients. 94% of them were for generic drugs. CMS names the drug for 104 of them, across 6 drugs with 11 or more claims each, at $19,771 in total drug cost.
Dr. Flach's Part D claims by kind of drug, 2024
- Generic172 claims94%
- Brand-name11 claims6%
Dr. Flach'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.
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 Lambert Flach offers telehealth to Medicare patients
Dr. Flach accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Flach as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Skin biopsy: 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. John Lambert Flach received $221 in industry payments in 2025
CMS Open Payments shows 8 general payments to Dr. Flach from 8 drug and device companies in 2025. Food and beverage make up the largest share, 100% of the total. Harmony Biosciences LLC paid the most, $37.
Companies that paid Dr. Flach the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John Lambert Flach graduated from Lincoln Mem Univ, Debusk Col of Osteopathic Med
Dr. Flach graduated from Lincoln Mem Univ, Debusk Col of Osteopathic Med in 2021.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. John Lambert Flach'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 DataDmand AI Org Hierarchy Data |
| 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)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. John Lambert Flach
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 Lambert Flach's NPI number?
Dr. John Lambert Flach's NPI number is 1386223089. It was assigned on April 8, 2021, and it is active in the NPI Registry.
What kind of doctor is Dr. John Lambert Flach?
Dr. John Lambert Flach is a neurologist in Arlington Heights, Illinois. The primary specialty in the NPI Registry is Neurology Physician (taxonomy code 2084N0400X).
Where does Dr. John Lambert Flach practice?
Dr. Flach practices at 800 W Central Road, Arlington Heights, IL 60005. Dr. Flach's primary practice is Northwest Community Hospital in Arlington Heights, Illinois, part of Endeavor Health. Dmand AI also links Dr. Flach to 1 group practice or clinic and 1 hospital outpatient department.
What is Dr. John Lambert Flach's office phone number?
The practice phone on file for Dr. Flach is (847) 618-1000.
What is Dr. John Lambert Flach's medical license number?
Dr. Flach holds Illinois license 036173195.
Which hospitals is Dr. John Lambert Flach affiliated with?
Dr. Flach practices at Northwest Community Hospital in Arlington Heights, Illinois.
What medical group is Dr. John Lambert Flach part of?
Dr. Flach is linked to Endeavor Health Medical Group.
Does Dr. John Lambert Flach accept Medicare?
Yes. CMS lists Dr. Flach as accepting Medicare assignment.
Does Dr. John Lambert Flach offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Flach as offering telehealth services.
Where did Dr. John Lambert Flach go to medical school?
Dr. Flach graduated from Lincoln Mem Univ, Debusk Col of Osteopathic Med in 2021.
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What drugs does Dr. John Lambert Flach prescribe most?
In 2024 Medicare Part D data, Dr. Flach's most prescribed drugs by claims were Levetiracetam, Topiramate and Carbidopa-Levodopa.
Has Dr. John Lambert Flach received payments from drug or device companies?
CMS Open Payments shows $221 in general payments to Dr. Flach from 8 companies from 2025 to 2025. The largest total came from Harmony Biosciences LLC.
How long has Dr. John Lambert Flach been practicing?
Dr. Flach graduated from medical school in 2021, 5 years ago.
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