Marshall Scott Irby, M.D.
Pulmonary Disease Physician · Monroe, LA
Marshall Scott Irby, M.D. is a pulmonary disease physician with a practice address in Monroe, Louisiana, and NPI 1679560411, issued on Oct 5, 2005. Check the license (Louisiana 08027R, as entered in NPPES) on the Louisiana State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Marshall Scott Irby
- Credential
- M.D.
- Primary taxonomy
- Pulmonary Disease Physician 207RP1001X
- License number
- 08027R LA
Self-reported in NPPES; status is on the state search - Practice location
- 2810 Armand St, Monroe, LA 71201
- Phone
- (318) 322-5864
- Enumerated
- Oct 5, 2005
- Record last updated
- Jan 16, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (318) 322-5992
- Medicaid ID
- 1388068 LA
- Medicare enrollment
- Enrolled (PECOS I20100322000056); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest pulmonary disease physician records → All 208 in Louisiana → Look up another NPI →
Verify Marshall Scott Irby in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersLouisiana State Board of Medical Examiners
Search for license 08027RCheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
27% more Medicare Part D claims than the average pulmonary disease physician in 2024
1,808 Medicare Part D claims for 287 beneficiaries, against an average of 1,425 among the 11,596 providers of this specialty who prescribed in Part D. Brand-name drugs were 57% of claims.
Most prescribed
- Trelegy Ellipta225 claims
- Azithromycin213 claims
- Stiolto Respimat202 claims
- Albuterol Sulfate Hfa156 claims
- Spiriva Respimat117 claims
- Anoro Ellipta112 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The MIPS final score for 2023 (Medicare payment program): 5.9 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $500.60
25 payments; by number, the most common kind was food and beverage; the largest payer was Mylan Specialty L.P. The 8,806 providers of this specialty with any payment received $5,159.88 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Marshall Scott Irby among 208 pulmonary disease physician records in Louisiana
Marshall Scott Irby, M.D. is one of 208 pulmonary disease physician records with a practice address in Louisiana. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 84% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 75% of these records are
- Graduated1982 · median 2001 among the 156 with a school on file
- Record last updated2008 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RP1001X and a Louisiana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Pulmonary Disease Physician providers in Louisiana
There are 208 pulmonary disease physician records in Louisiana.
All 208 in Louisiana → Every provider in Monroe → Pulmonary Disease Physician nationwide →
The 8 pulmonary disease physician records with the nearest ZIP codes
- Charles Gbadouwey, MDMonroe, LA 712011043255177
- Thomas Gullatt, MDMonroe, LA 712011154487627
- Ronald Hammett, MDMonroe, LA 712011295746634
- Antti Maran, MDMonroe, LA 712011053352328
- Matthew Raley, MDMonroe, LA 712011235573361
- Allyn Resch, M.D.Monroe, LA 712011841452661
- Otto Villa, MDMonroe, LA 712011669461414
- Francis Wiser, D.O.Monroe, LA 712011154653418
Common questions
What is Marshall Scott Irby, M.D.'s NPI number?
Marshall Scott Irby, M.D.'s National Provider Identifier (NPI) is 1679560411, issued on Oct 5, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Marshall Scott Irby, M.D. located?
The NPPES record lists a practice address at 2810 Armand St, Monroe, LA, 71201. Phone: (318) 322-5864. Providers update this record themselves, so call before visiting.
How can I verify Marshall Scott Irby, M.D.'s license?
NPPES lists Louisiana license number 08027R, as entered by the provider. Search the Louisiana State Board of Medical Examiners at https://www.lsbme.la.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Marshall Scott Irby, M.D. prescribe under Medicare Part D?
In 2024, Marshall Scott Irby, M.D. had 1,808 Medicare Part D claims for 287 beneficiaries; the average among pulmonary disease physician prescribers was 1,425. Part D covers Medicare prescriptions only.
What is Marshall Scott Irby, M.D.'s MIPS final score?
The 2023 MIPS final score is 5.9 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.