Dr. Andrew Dawson Calhoun Sr., MD
- Medicare services, 2022
- 128
- Part D claims, 2024
- 227
- Industry payments
- $2,491
- Affiliated sites
- 1
- Medical group
- 1
- Practice address
- 1112 E Ascension Complex Blvd, Gonzales, LA 70737
- Practice phone
- Call (225) 621-5770
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Ascension Behavioral Health
Gonzales, Louisiana
Find Dr. Calhoun'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. Andrew Dawson Calhoun Sr. is a psychiatrist in Gonzales, Louisiana
Dr. Calhoun practices at Ascension Behavioral Health in Gonzales, Louisiana.
Dr. Calhoun's NPI, 1457422198, was assigned on November 13, 2006. Dr. Calhoun graduated from Louisiana State University School of Medicine in New Orleans in 1982. Dr. Calhoun holds Louisiana license 019198.
- NPI
- 1457422198NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9739130881
- NPI enumeration date
- November 13, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (225) 621-5770
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 70
- Medical school graduation
- 1982
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Andrew Dawson Calhoun Sr. practices at Ascension Behavioral Health in Gonzales, Louisiana
Dr. Calhoun's primary practice is Ascension Behavioral Health, at 1112 E Ascension Complex Blvd, Gonzales, LA 70737 in Ascension Parish. The practice phone is (225) 621-5770.
- Ascension Behavioral Health1112 E Ascension Complex Blvd, Gonzales, LA 70737 · Ascension ParishPhone(225) 621-5770
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Andrew Dawson Calhoun Sr. is affiliated with 2 sites of care and 1 medical group
Dr. Calhoun's primary practice is Ascension Behavioral Health in Gonzales, Louisiana. The medical group on file is Baton Rouge Behavioral Health. Dmand AI also links Dr. Calhoun to 1 more group practice or clinic, 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. Andrew Dawson Calhoun Sr.'s practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Calhoun practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Ascension Behavioral Health | Available with a free account |
| +1 more affiliated site | 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 each health system and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Andrew Dawson Calhoun Sr. is one of 443 psychiatrists in Louisiana
Psychiatry is Dr. Calhoun's primary specialty in the NPI Registry, under taxonomy code 2084P0800X. Dr. Calhoun is licensed in Louisiana.
Specialties and state licenses
- Psychiatry, LouisianaPrimary
Psychiatrists near Dr. Calhoun
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. Andrew Dawson Calhoun Sr. billed Medicare for 128 services in 2022
CMS data shows 128 Medicare services from Dr. Calhoun across 2 procedure codes in 2022. Medicare paid $4,180 for them. Every service was in an office.
Dr. Calhoun's Medicare services by type, 2021 to 2022
- 2021
- 2022
- Tests and treatments
- 2021: 682022: 726%
- Office and hospital visits
- 2021: 1392022: 5660%
Dr. Calhoun compared with the Louisiana median for psychiatrists, 2022
- Dr. Calhoun
- Louisiana median
- Medicare services
- 128vs 133Close to median
- Part D claims
- 109vs 34869% below
Medians across 456 psychiatrists in Louisiana with Dmand AI profiles that report each measure.
Dr. Calhoun's most billed Medicare procedure codes, 2022
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. Calhoun?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Calhoun and other psychiatrists in Louisiana.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Andrew Dawson Calhoun Sr.'s patients have a median age of 51
Across all payers, Dmand AI patient panel data puts Dr. Calhoun's median patient age at 51, with 56% women.
Dr. Calhoun's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 51
Patient panel by sex, all payers
- Women56%
- Men44%
Source: Dmand AI Patient Panel Data
Dr. Andrew Dawson Calhoun Sr. wrote 227 Medicare Part D claims in 2024
In 2024, Dr. Calhoun wrote 227 Medicare Part D claims for 39 patients. 95% of them were for generic drugs. CMS names the drug for 109 of them, across 8 drugs with 11 or more claims each, at $1,110 in total drug cost. In 2022, CMS named 3,112 claims across 50 drugs.
Dr. Calhoun's Part D claims by kind of drug, 2024
- Generic215 claims95%
- Brand-name12 claims5%
Dr. Calhoun'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. Calhoun's Part D claims, 2024
- Antipsychotics, patients 65 and over14%31 of 227 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, 2022 to 2024
- 2022
- 2024
- Claims for drugs CMS names
- 2022: 3,1122024: 10996%
Drugs named by CMS: 8 in 2024, 50 in 2022.
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. Andrew Dawson Calhoun Sr. takes part in Medicare
Dr. Calhoun 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)
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Andrew Dawson Calhoun Sr. received $2,491 in industry payments from 2016 to 2025
CMS Open Payments shows 147 general payments to Dr. Calhoun from 13 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 98% of the total. Sunovion Pharmaceuticals Inc. paid the most, $669.
General payments to Dr. Calhoun by program year, 2016 to 2025
General payments to Dr. Calhoun by kind, 2016 to 2025
- Food and beverage$2,44498%
- Education$472%
Companies that paid Dr. Calhoun 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. Andrew Dawson Calhoun Sr. graduated from Louisiana State University School of Medicine in New Orleans
Dr. Calhoun graduated from Louisiana State University School of Medicine in New Orleans in 1982.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Andrew Dawson Calhoun Sr.'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)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) |
| 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. Andrew Dawson Calhoun Sr.
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. Andrew Dawson Calhoun Sr.'s NPI number?
Dr. Andrew Dawson Calhoun Sr.'s NPI number is 1457422198. It was assigned on November 13, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Andrew Dawson Calhoun Sr.?
Dr. Andrew Dawson Calhoun Sr. is a psychiatrist in Gonzales, Louisiana. The primary specialty in the NPI Registry is Psychiatry Physician (taxonomy code 2084P0800X).
Where does Dr. Andrew Dawson Calhoun Sr. practice?
Dr. Calhoun practices at 1112 E Ascension Complex Blvd, Gonzales, LA 70737. Dr. Calhoun's primary practice is Ascension Behavioral Health in Gonzales, Louisiana. Dmand AI also links Dr. Calhoun to 1 group practice or clinic.
What is Dr. Andrew Dawson Calhoun Sr.'s office phone number?
The practice phone on file for Dr. Calhoun is (225) 621-5770.
What is Dr. Andrew Dawson Calhoun Sr.'s medical license number?
Dr. Calhoun holds Louisiana license 019198.
What medical group is Dr. Andrew Dawson Calhoun Sr. part of?
Dr. Calhoun is linked to Baton Rouge Behavioral Health.
Does Dr. Andrew Dawson Calhoun Sr. accept Medicare?
Yes. CMS data shows Dr. Calhoun billed Medicare for 128 services in 2022, and Dr. Calhoun accepts Medicare assignment.
What services does Dr. Andrew Dawson Calhoun Sr. bill to Medicare?
In 2022, Dr. Calhoun's most billed Medicare services were infusion or chemotherapy administration (96372) and office visit, established patient (99214).
Where did Dr. Andrew Dawson Calhoun Sr. go to medical school?
Dr. Calhoun graduated from Louisiana State University School of Medicine in New Orleans in 1982.
What drugs does Dr. Andrew Dawson Calhoun Sr. prescribe most?
In 2024 Medicare Part D data, Dr. Calhoun's most prescribed drugs by claims were Buspirone HCl, Trazodone HCl and Lamotrigine.
Has Dr. Andrew Dawson Calhoun Sr. received payments from drug or device companies?
CMS Open Payments shows $2,491 in general payments to Dr. Calhoun from 13 companies from 2016 to 2025. The largest total came from Sunovion Pharmaceuticals Inc.
How long has Dr. Andrew Dawson Calhoun Sr. been practicing?
Dr. Calhoun graduated from medical school in 1982, 44 years ago.
Selling to psychiatry practices?
See psychiatrists in Louisiana by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card