Dr. Mervin Nigel Leader, MD
- Medicare services, 2018
- 21
- Part D claims, 2024
- 120
- Industry payments
- $1,992
- Medical groups
- 2
- State licenses
- 2
- Practice address
- 213 NW 10th St, Fairfield, IL 62837
- Practice phone
- Call (479) 259-8855
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Medical group
Find Dr. Leader'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. Mervin Nigel Leader is a psychiatrist in Fairfield, Illinois
Dr. Leader practices with Community Clinic, a medical group.
Dr. Leader's NPI, 1255522611, was assigned on August 9, 2007. Dr. Leader holds Illinois license 036163562.
- NPI
- 1255522611NPI Registry (opens in a new tab)
- NPI enumeration date
- August 9, 2007
- NPI status
- Active
- Practice phone
- (479) 259-8855
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); and Dmand AI Professional Profile Data
Dr. Mervin Nigel Leader's practice address is in Fairfield, Illinois
Dr. Leader's practice address in the NPI Registry is 213 NW 10th St, Fairfield, IL 62837, in Wayne County. The practice phone is (479) 259-8855.
- NPI Registry address213 NW 10th St, Fairfield, IL 62837 · Wayne CountyPhone(479) 259-8855
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Mervin Nigel Leader is affiliated with 2 medical groups
Dr. Leader is part of Community Clinic, a medical group in Springdale, Arkansas. The medical group on file is Resolutions Behavioral Health Services.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Mervin Nigel Leader's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Leader practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Community Clinic | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Community Clinic and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Mervin Nigel Leader is one of 1,527 psychiatrists in Illinois
Psychiatry is Dr. Leader's primary specialty in the NPI Registry, under taxonomy code 2084P0800X. Dmand AI has Dr. Leader's licenses on file in 2 states: Illinois and Arkansas.
Specialties and state licenses
- Psychiatry, IllinoisPrimary
- Arkansas license
Psychiatrists near Dr. Leader
Counts of psychiatrists 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. Mervin Nigel Leader billed Medicare for 21 services in 2018
CMS data shows 21 Medicare services from Dr. Leader across 1 procedure code in 2018, all of them office visits. Medicare paid $455 for them. Every service was in an office.
Dr. Leader's Medicare services by type, 2017 to 2018
- 2017
- 2018
- Office and hospital visits
- 2017: 1792018: 2188%
- Tests and treatments
- 2017: 492018: 0100%
Dr. Leader compared with the Illinois median for psychiatrists, 2018
- Dr. Leader
- Illinois median
- Medicare services
- 21vs 20390% below
- Part D claims
- 39vs 17478% below
Medians across 1,588 psychiatrists in Illinois with Dmand AI profiles that report each measure.
Dr. Leader's most billed Medicare procedure codes, 2018
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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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Mervin Nigel Leader wrote 120 Medicare Part D claims in 2024
In 2024, Dr. Leader wrote 120 Medicare Part D claims for 30 patients. 93% of them were for generic drugs. CMS names the drug for 39 of them, across 3 drugs with 11 or more claims each, at $856 in total drug cost. In 2023, CMS named 135 claims across 6 drugs.
Dr. Leader's Part D claims by kind of drug, 2024
- Generic112 claims93%
- Brand-name and other8 claims7%
Dr. Leader'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. Leader's Part D claims, 2024
- Antipsychotics, patients 65 and over11%13 of 120 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: 1352024: 3971%
Drugs named by CMS: 3 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
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Dr. Mervin Nigel Leader received $1,992 in industry payments from 2016 to 2025
CMS Open Payments shows 76 general payments to Dr. Leader from 14 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 99% of the total. Otsuka America Pharmaceutical, Inc. paid the most, $630.
General payments to Dr. Leader by program year, 2016 to 2025
General payments to Dr. Leader by kind, 2016 to 2025
- Food and beverage$1,97999%
- Education$90%
- Gifts$40%
Companies that paid Dr. Leader the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Mervin Nigel Leader'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 | 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 |
| 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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. Mervin Nigel Leader
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. Mervin Nigel Leader's NPI number?
Dr. Mervin Nigel Leader's NPI number is 1255522611. It was assigned on August 9, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Mervin Nigel Leader?
Dr. Mervin Nigel Leader is a psychiatrist in Fairfield, Illinois. The primary specialty in the NPI Registry is Psychiatry Physician (taxonomy code 2084P0800X).
Where does Dr. Mervin Nigel Leader practice?
Dr. Leader practices at 213 NW 10th St, Fairfield, IL 62837. Dr. Leader's primary practice is Community Clinic, a medical group.
What is Dr. Mervin Nigel Leader's office phone number?
The practice phone on file for Dr. Leader is (479) 259-8855.
What is Dr. Mervin Nigel Leader's medical license number?
Dr. Leader holds Illinois license 036163562, one of the licenses on file in 2 states.
Which states has Dr. Mervin Nigel Leader been licensed in?
Dmand AI has state licenses on file for Dr. Leader in Illinois and Arkansas.
What medical group is Dr. Mervin Nigel Leader part of?
Dr. Leader is part of Community Clinic in Springdale, Arkansas. Dr. Leader is also linked to Resolutions Behavioral Health Services. Dmand AI links Dr. Leader to 2 medical groups in all.
Does Dr. Mervin Nigel Leader accept Medicare?
Yes. CMS data shows Dr. Leader billed Medicare for 21 services in 2018.
What services does Dr. Mervin Nigel Leader bill to Medicare?
In 2018, Dr. Leader's most billed Medicare services were office visit, established patient (99213).
What drugs does Dr. Mervin Nigel Leader prescribe most?
In 2024 Medicare Part D data, Dr. Leader's most prescribed drugs by claims were Fluoxetine HCl, Hydroxyzine HCl and Lithium Carbonate.
Has Dr. Mervin Nigel Leader received payments from drug or device companies?
CMS Open Payments shows $1,992 in general payments to Dr. Leader from 14 companies from 2016 to 2025. The largest total came from Otsuka America Pharmaceutical, Inc.
How long has Dr. Mervin Nigel Leader been practicing?
Dr. Leader's NPI was assigned in 2007.
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